KEW BULLETIN (2018) 73:15 DOI 10.1007/S12225-018-9735-8 ISSN: 0075-5974 (print) ISSN: 1874-933X (electronic) Lectotypifications in Nephelium L. and Xerospermum Blume (Sapindaceae) Boonchuang Boonsuk1 & Pranom Chantaranothai1 Summary. Eleven synonyms for five Nephelium species: N. cuspidatum Blume, N. hypoleucum Kurz, N. juglandifolium Blume, N. lappaceum L. and N. melanomiscum Radlk. and 11 synonyms of Xerospermum noronhianum (Blume) Blume are discussed and typified. Key Words. Nephelieae, nomenclature, Southeast Asia, synonym, taxonomy, Thailand. Introduction The genera Nephelium L. and Xerospermum Blume have generally been placed in Sapindaceae tribe Nephelieae (Radlkofer 1931), although AcevedoRodriguez et al. (2011) treated them as genera of uncertain position. The former genus comprises 22 species distributed from Assam, Yunnan, Hainan to Southeast Asia (Leenhouts 1986), whereas only two species were recognised for the latter, occurring from Bangladesh, Assam, Myanmar, Indo-China and the Malay Peninsula, to Sumatra, Java and Borneo (Leenhouts 1983). Nephelium is extremely difficult to identify based on sterile parts or flowers. Fruits and vegetative parts are important for species delimitation (Welzen 1999) but it rather resembles Mischocarpus Blume and Xerospermum in overall morphology, which can easily cause mis-identification (Leenhouts 1983). Revisions of Nephelium, Xerospermum and the wider Sapindaceae in Malesia have been undertaken (Leenhouts 1983, 1986; Adema et al. 1994) but the typification of several accepted names and synonyms remained unclear. Therefore, the present study aims to lectotypify names as required by the International Code for Nomenclature (ICN), especially Articles 9.5, 9.11, 9.12 and 9.17 (McNeill et al. 2012). Materials and methods Type specimens of Nephelium cuspidatum Blume, N. hypoleucum Kurz, N. juglandifolium Blume, N. lappaceum L., N. melanomiscum Radlk., Xerospermum noronhianum (Blume) Blume and associated synonyms, deposited in herbaria at A, BM, C, CAL, FI, G, K, L, M, NY, P, SING, U and US, were examined. Nearly all type specimens housed at BM, K and SING and specimen images from A, BM, FI, G, K, L, M, NY, P, U and US were seen. Those not seen are indicated by ‘n.v.’. For taxa from Myanmar and the Malay Peninsu- la, many collections were deposited in CAL, especially those made by King, Kurz, etc. We requested all appropriate material, namely of N. dasyneurum Radlk., N. longana (Lam.) Cambess. var. hypoleuca (Kurz) King, Cupania glabrata Kurz, Xerospermum echinulatum Radlk., X. intermedium Radlk. and X. wallichii King. However, only the type of X. echinulatum was located. Typifications Nephelium cuspidatum Blume (1847: 110). Type: Indonesia, Borneo, Korthals s.n. (lectotype L! [L0014463], selected here; isolectotype L! – 3 sheets [L0014464, L0014465, L0014466]). Nephelium beccarianum Radlk. (Radlkofer 1879a: 97). Type: Malaysia, Sarawak, Gunon Mattan, July 1866, fl., Beccari 2279 (lectotype FI! [FI008668], selected by Leenhouts (1986)). N. multinerve Radlk. (Radlkofer 1879a: 97). Type: Malaysia, Sarawak, cult., Beccari 2820 (holotype FI! [FI008667]). N. ophiodes Radlk. (Radlkofer 1879b: 116). Type: Malay Peninsula, Maingay 543 (lectotype K! [K000701872], selected here). N. bassacense Pierre (1894: pl. 319B). Type: Laos, ad Bassac, Harmand 1427 (lectotype P! [P02297355], selected by Leenhouts (1986); isolectotypes K! [K000701756], M! [M0224992], P! – 3 sheets [P02297356, P02297359, P02297366]). N. dasyneurum Radlk. (Radlkofer 1907: 353). Type: Indonesia, Sumatra, Forbes 2842 (lectotype FI! [FI008670], selected here; isolectotypes L!-3 sheets [L0014468, L0014469, L0014470], P!-2 sheets [P02297374, P02297375], SING! [SING0045632]). N. obliquinerve Radlk. (Radlkofer 1907: 354). Type: Malay Peninsula, Malacca, Kesang Tua, Goodenough 1304 (lectotype SING! [SING0045630], selected here). Accepted for publication 31 January 2018. 1 Department of Biology and Centre of Excellence on Biodiversity (BDC), Faculty of Science, Khon Kaen University, Khon Kaen, 40002, Thailand. e-mail: chantaranothai@gmail.com © The Board of Trustees of the Royal Botanic Gardens, Kew, 2018 15 Page 2 of 6 KEW BULLETIN (2018) 73:15 N. robustum Radlk. (Radlkofer 1913: 1607). Type: Philippines, Palawan, Elmer 12934 (lectotype M! [M0224990], selected here; isolectotypes A! [A00050857], C! [C10018642], F! [FI010505], G! [G00074237], K! [K000701769], L! [L0014472], M! [M0224991], NY! [NY00337934], P! [P02297376], U! [U0006529], US! [US00095308]). Radlkofer (1913) also described Nephelium robustum based on Elmer 12934 but without any herbarium cited. Duplicates were distributed to several herbaria. We select the specimen at M (M0224990) as the lectotype because it is a good specimen and also conforms to the description by Radlkofer. NOTES. Blume (1847) described Nephelium cuspidatum Nephelium hypoleucum Kurz (1871: 50). Nephelium longana (Lam.) Cambess. var. hypoleuca (Kurz) King (1896: 435). Type: Burma, Martaban, Jan. 1862, fl., Brandis 691 (lectotype K! [K000701844], selected by Leenhouts (1986); isolectotype M! [M0224985]). Nephelium cochinchinense Pierre (1895: text with pl. 321). Type: Vietnam, Bien Hua, Thu dan mot, April 1865, fr., Pierre 875 (lectotype P! [P02297360], selected here; isolectotype K! [K000701752]). Xerospermum laoticum Gagnep. (Gagnepain 1947: 69). Type: Laos, near Suvannakhet, y. fr., Poilane 12089 (lectotype P! [P06667937], selected here; isolectotype K! [K000701753]). without any specimens or herbarium location cited in the protologue. Leenhouts (1986) cited Korthals’ specimens as an undefined type although ‘holotype’ was written by Leenhouts on one of the sheets (L0014463). However, all four sheets are still effectively syntypes and the name needs lectotypification. Korthals s.n. L0014463 is designated here as the lectotype because it is the best preserved. Nephelium ophiodes was first described by Radlkofer (1879b) without any specimens and herbarium cited but Leenhouts (1986) verified Maingay 543 as Radlkofer’s type for the species. He cited the specimen at B as the holotype without seeing the specimens and the specimen at K was cited as an isotype by him. Nevertheless, the specimen at B should be the lectoype (designated by Leenhouts (1986)) but we agree that the specimen at B may have been destroyed and the remaining extant specimen is at K. Therefore, we select the specimen at K (K000701872) as the lectotype according to Article 9.11 of the ICN (McNeill et al. 2012). Pierre (1894) described Nephelium bassacense, including a line drawing in the protologue but without any type specimen cited. However, Leenhouts (1986) cited Harmand 1427 at P (P02297355) as the holotype (also labelled on the sheet), with isotypes at K and M. This can be treated as effective lectotypification by Leenhouts. Radlkofer (1907) noted the collection Forbes 2842 at ‘Hb. Berol.’ from Sumatra in the protologue of Nephelium dasyneurum. However, Leenhouts (1986) cited Forbes 2842 (CAL) as the holotype but the specimen had not been seen. We requested to see it from CAL and found that it does not exist there. According to the protologue, we conclude that the holotype should be in B but may be lost or destroyed. Following Article 9.12 of ICN (McNeill et al. 2012), we select the specimen at FI (FI008670), one of the isotypes verified by Leenhouts (1986), as the lectotype because it is a perfect specimen and congruent with the protologue. Radlkofer (1907) investigated and described specimens of Goodenough 1304 and 1782 and Maingay 450 collected from Malacca for Nephelium obliquinerve. All specimens are syntypes and lectotypification is required according to Article 9.11 of the ICN (McNeill et al. 2012). We found that the specimen of Goodenough 1304 at SING has leaves and fruits which are in good condition and we select this specimen as the lectotype. © The Board of Trustees of the Royal Botanic Gardens, Kew, 2018 NOTES. Kurz (1871) cited a Brandis specimen from Burma in the protologue of Nephelium hypoleucum without citing a herbarium location. The type is not in CAL and we assume that it was deposited elsewhere. Leenhouts (1986) verified Brandis 691 at K as the original material with a duplicate at M. Therefore, the lectotype was automatically selected by Leenhouts (1986). Nephelium cochinchinense was first described by Pierre (1895) based on a gathering of several specimens under Pierre 875. He noted the localities as ‘Habite toute la Basse Cochinchine ct le Cambodge’ in the protologue but without a collection date. Specimens under this number were collected at different times and localities between January 1865 and February 1872 in Cambodia and Vietnam. Therefore, the name needs to be lectotypified using one of these specimens. We select Pierre 875 (P02297360), collected from Bien Hua, Vietnam in April 1865, as the lectotype because it agrees well with the protologue and has fruits which are very useful for identification. Seven different collections, namely Chevalier 31910 ( P 0 6 6 6 7 9 3 6 ) f r o m C a m b o d i a , P o i la n e 2 5 0 3 (K000701748, L0037669, P06667910), 23602 (P06667935), 13287bis (K000701747, P06667934) from Vietnam, and Poilane 11697 (K000701755, P06667907), 11961 (K000701754, P06667912), 12089 (K000701753, P06667937) from Laos are mentioned in the original description of Xerospermum laoticum by Gagnepain (1947). However, this taxon was placed in synonymy under N. hypoleucum by Leenhouts (1986). All specimens comprise labels with handwriting which we assume to be that of Gagnepain. Poilane 12089 (P06667937) is selected as the lectotype because it is one of Poilane’s specimens collected from Laos and KEW BULLETIN (2018) 73:15 has vegetative parts with fruits which are important characteristics for species diagnosis. Nephelium juglandifolium Blume (1847: 106). Type: Indonesia, West Java, Anon. s.n. (lectotype L! [L0037673], selected here; isolectotypes K! [K000701757], L! – 5 sheets [L0037671, L0037672, L0037674, L0037675, L0037676], NY! [NY00337932], P! [P02297377]). Nephelium altissimum Teijsm. & Binn. (Teijsman & Binnendijk (1851: 306). Type: Java, Bogor Bot. Gard. III.E. 25a, Nedi s.n. (holotype BO n.v.; isotypes L! – 4 sheets [L0037677, L0037678, L0037679, L0037680], M! [M0224978]). N. tuberculatum Radlk. (Radlkofer 1907: 352). Type: Malaya, Perak, Scortechini 1767 (lectotype M! [M0224979], selected here; isolectotype K! [K000701869]). NOTES. Nephelium juglandifolium was first described by Blume (1847) but without specimens cited in the protologue. Leenhouts (1986) cited specimen ‘L sh. no. 908.270-181’ (L0037673) as the holotype. Therefore, the specimen is accepted as the lectotype designated by Leenhouts (1986). Two syntypes of Nephelium tuberculatum from Perak, Malaysia, King's collector 7903 (ex eodem Hb. Comm.) and Scortechini 1767 (ex Hb. Calcutt. comm. c. Hb. Monac.) were cited by Radlkofer (1907) in the protologue. The former collection is deposited at M and the latter is found at K and M, whereas no specimen is available at CAL. We select Scortechini 1767 (M0224979) as the lectotype because it is a good specimen and associated with the workplace of Radlkofer. Nephelium lappaceum L. (Linnaeus 1767: 125). Euphoria nephelium DC. (Candolle 1824: 612), nom. illegit. Type: Indonesia, Java, Bogor, Bogor Bot. Gard. III. H. 10, Sutrisno 71 (neotype L! [L0014480], selected here; isoneotypes BISH! – 2 sheets [BISH1004941, BISH1004942], L! [L0014481]). Euphoria glabra Blume (1825: 233), nom. illegit. Nephelium glabrum (Blume) Cambess. (Cambessèdes 1829: 30). Nephelium lappaceum L. var. glabrum Blume (1847: 104). Type: Indonesia, Java, Anon. s.n. (lectotype L! [L0014473], selected here). Nephelium chryseum Blume (1847: 105). Type: Borneo, Korthals s.n. (lectotype L! [L0014484], selected by Leenhouts (1986); isolectotype L! – 4 sheets [L0014482, L0014483, L0014485, L0014486]). N. mutabile Blume var. pallens Hiern (1875: 687). Nephelium pallens (Hiern) Radlk. (Radlkofer 1907: 351). Type: Malay Peninsula, Maingay 1527 (lectotype K! [K000701865], selected by Leenhouts (1986)). Page 3 of 6 15 N. xanthioides Radlk. (Radlkofer 1879a: 97). Type: Malaysia, Sarawak, Beccari PB 2849 (holotype FI! [FI007861]). N. maculatum Radlk., (Radlkofer 1925: 400). Type: Indonesia, West Java, Koorders 38975 (holotype BO n.v.). N. obovatum Ridl. (Ridley 1933: 191). Type: Malaysia, Sarawak, Haviland 2275 (lectotype K! [K000701776], selected by Leenhouts (1986); isolectotypes BM! [BM000884037], L! [L0178423], SING n.v.). NOTES. The first-step neotypification of Nephelium lappaceum was carried out by Leenhouts (1986), who cited the collection in L made from a tree in bed III. H. 10 at Bogor Botanic Garden, as the neotype. However, it appears that several collections were made from the same tree by different collectors (Anon. s.n. (M0224977), Carocci-Buzi 190 (L0014479), Nedi 12 (L0014475, L0014476, L0014477, L0014478) and Sutrisno 71 (BISH1004941, BISH1004942, L0014480, L0014481), all of which were cited by Leenhouts (1986). Therefore, we select Sutrisno 71 at L (L0014480), one of the best specimens among those collections, for a second-step neotypification according to Article 9.17 of the ICN (McNeill et al. 2012). The type of Euphoria glabra was not cited in the protologue but Leenhouts (1986) cited two specimens of an anonymous collector at L as syntypes. We choose one of these (L0014473) as the lectotype because it is a perfect specimen and congruent with the protologue. Ridley described Nephelium obovatum based on Haviland 2275 with male flowers collected from Borneo (Sarawak), but no herbarium was cited in the protologue. The name does not have a holotype although Leenhouts (1986) mentioned Haviland 2275 at K (K000701776) as the holotype. We conclude that the type at K should not be a holotype but a lectotype which was automatically selected by Leenhouts (1986). Nephelium melanomiscum Radlk. (Radlkofer 1879b: 112). Type: Malaysia, Sarawak, Beccari 39l8 (lectotype FI! [FI007858], selected by Leenhouts (1986); isolectotypes G! [G00074242], K! [K000701778], L! [L0037690], P! [P02297386]). Nephelium xerospermoides Radlk. (Radlkofer 1913: 1608). Type: Philippines, Mindanao, Distr. of Davao, Todaya, Mt Apo, Sibulan R., Elmer 11205 (lectotype M! [M0224974], selected here; isolectotypes A! [A00050859], FI! [FI010507], K! [K000701767], L! [L0037691], U! [U0006533]). NOTES . Radlkofer (1879b) described Nephelium melanomiscum without citation of a herbarium specimen. Leenhouts cited only a specimen at FI as the © The Board of Trustees of the Royal Botanic Gardens, Kew, 2018 15 Page 4 of 6 type but we found duplicates at K, L and P. We accept the specimen at FI to be the lectotype selected by Leenhouts (1986). Raldkofer (1913) referred to two collections collected from Mindanao, Elmer 11205 and Klemme 15215, in the protologue of N. xerospermoides. Because the name has no holotype and needs lectotypification, we select the Elmer 11205 (M0224974) as the lectotype because it is in good condition and congruent with the protologue. KEW BULLETIN (2018) 73:15 X. X. Xerospermum noronhianum (Blume) Blume (1847: 100); Euphoria noronhiana Blume (1825: 234), nom. illegit.; Nephelium noronhianum Cambess. (Cambessèdes 1829: 30). Type: Indonesia, Java, Blume s.n. (lectotype L! [L0014666], selected by Leenhouts (1983); isolectotype, L! [L0014667]). Cupania glabrata Kurz (1872: 303). Type: Myanmar (Burma), Pegu Yomah, 4 June 1871, Kurz 2058 (lectotype K! [K000701835], selected here; isolectotype M! [M0224906]). Xerospermum lanceolatum Radlk. (Radlkofer 1879a: 95). Type: Malaysia, Sarawak, Beccari PB 1031 (lectotype FI n.v., selected by Leenhouts (1983); isolectotypes K n.v., M! [M0224907], G-DC! [G00006116], P! [P02297345]). X. muricatum Radlk. (Radlkofer 1879a: 95). Type: Malay Peninsula, Griffith KD 1004 (lectotype M! [M0224902], selected by Leenhouts (1983); isolectotypes C! [C10018761], K! – 3 sheets [K000701875, K000701876, K000701877], L! [L0014661], P! – 3 sheets [P02297348, P02297349, P02297350]). X. microcarpum Pierre (1894: text with pl. 320). Type: Vietnam, Kien Giang (Austro-Cochinechine), Phu Quoc, March 1877, fl. & y. fr., Pierre 2067 (lectotype P! [P02297331], selected here; isolectotype P! [P02297332]). X. microcarpum Pierre var. ellipticum Pierre (1894: text with pl. 320). Type: Vietnam, Austro-Cochinchine, Phu Quoc, Feb. 1874, fr., Pierre 4119 (lectotype P! [P02297329], selected here; isolectotypes K! – 2 sheets [K0007011827, K0007011828]). X. wallichii King (1896: 432). Type: Malay Peninsula, King's collector 8725 (lectotype K! [K000701796], selected here; isolectotype BM! [BM000884107]). X. brachyphyllum Radlk. (Radlkofer 1907: 348). Type: Indonesia, West Java, Dec. 1879, Forbes 452 (lectotype G-DC! [G0000 6109 ], selected here; isolectotypes BM! – 2 sheets [BM000884106, BM000884108], BO n.v., L! [L0014668]). X. intermedium Radlk. (Radlkofer 1907: 349). Type: Burma, Kadan Kyun (King's Island), 2 Dec. 1838, Helfer KD 1005 (lectotype K! [K000701838], selected here; isolectotypes C! [C10018759], FI! [FI010503], K! [K000701839], L! [L0014648], M! [M0224908], P! – 2 sheets [P02297322, P02297323]). X. echinulatum Radlk. (Radlkofer 1907: 350). Type: Malaysia, Perak, near Ulu Kerling, March 1886, fr., © The Board of Trustees of the Royal Botanic Gardens, Kew, 2018 X. X. X. X. King's collector 8637 (lectotype G-DC! [G00006111], selected here; isolectotypes BM! [BM000884103], CAL! [CAL0000025844], K! [K000701802], L! [L0014660]). tonkinense Radlk. (Radlkofer 1910: 303). Type: Vietnam, Tonkin, Vallee de Lankok, 25 July 1888, fr., Balansa 3419 (lectotype G-BOIS! [G00006123], selected here; isolectotypes G-BOIS! [G00006124], K! K000701825]). fallax Radlk. (Radlkofer 1922: 340). Type: Java, Blume s.n. (holotype M! [M0224903]). testudineum Radlk. (Radlkofer 1922: 340). Type: Indonesia, Sumatra, Lampongs, Bogor Bot. Gard. III. H. 17, Teysmann s.n. (lectotype M! [M0224914], selected here; isolectotypes BO n.v., L! [L0014670], P! [P02297346]). xanthophyllum Radlk. (Radlkofer 1925: 400). Type: Indonesia, Java, Bogor Bot. Gard. 111. 1. 50a, Anon. 11 (holotype M! [M0224919]; isotypes BO n.v., L! [L0014669], P n.v.). donnaiense Gagnep. (Gagnepain 1947: 70). Type: Vietnam, Annam, Huat Douai, near Djiring, Mt Bra an, 1 March 1935, Poilane 24682 (lectotype P! [P02297342], selected here). poilanei Gagnep. (Gagnepain 1947: 71). Type: Vietnam, Annam, Thanh Hoa, Quan Hoa, Hoi Xuan, 24 Aug. 1920, Poilane 1770 (lectotype P! [P02297333], selected here; isolectotype P! [P02297334]). NOTES. Kurz (1872) described Cupania glabrata based on his own collections from Pegu and Martaban. However, he did not cite the herbarium in which the type was located. Leenhouts (1983) cited Kurz 2058, collected from Pegu, in K and M as isotypes only. We assumed that the holotype was deposited at CAL but we were unable to locate it. Therefore, we select the specimen Kurz 2058 (K) as the lectotype because it is a perfect and well-preserved specimen. Radlkofer (1879a) first described Xerospermum lanceolatum but did not cite any specimens. In a later description (Radlkofer 1932) cited Beccari 1031 at ‘Hb. Florent., Vindob. and Monac.’. Beccari’s specimens should be syntypes although Leenhouts (1983) cited the specimen at FI as an undefined type. Nevertheless, the specimen at FI should be cited as the lectotype because we conclude that the lectotypification was already made automatically by Leenhouts (1983). Radlkofer (1879a) described Xerospermum muricatum but without a specimen cited in the protologue. Leenhouts (1983) referred to Griffith KD 1004 (M0224902) as the holotype which should be cited as the lectotype. According to his choice of specimen for the holotype, this counts as an effective lectotypification by him. Pierre (1894) described and cited specimen ‘Hb. Pierre no. 2067’ collected from Phu Quoc, Vietnam for Xerospermum microcarpum but we have seen two KEW BULLETIN (2018) 73:15 sheets of this collection at P; therefore, we select P (P02297331) as the lectotype. Xerospermum microcarpum var. elliptica was first described by Pierre (1894) based on Pierre 714 and 4119 from Cambodia and Southern Vietnam. It was later accepted as var. ellipticum by Leenhouts (1983). Thirty syntype sheets of Pierre 714 and 4119 were collected at various times and localities and deposited in many herbaria. In addition, the unambiguous labels of Pierre 714 and 4119 were presented in several specimens because both numbers were usually written on the same label. We studied the protologue for the correct collector number and best specimen for lectotypification. Accordingly, we select Pierre 4119 (P02297329) which was collected from Phu Quoc, Vietnam in Feb. 1874 as the lectotype for the variety, because it is a clearly numbered and perfect specimen. Duplicate specimens are deposited in K. King (1896) described Xerospermum wallichii and cited several syntypes collected from Singapore and Penang, Perak and Pahang. Leenhouts (1983) designated King's collector 8725 (CAL) as lectotype (not seen). However, we assume that there is no type collection at CAL although the collection is present at BM and K. Therefore, we select King's collector 872 (K000701796) as the lectotype because it is a perfect specimen. Radlkofer (1907) cited two collections in the protologue of Xerospermum echinulatum, namely King's collector 8637 and Scortechini 2104, both from the Malay Peninsula and deposited at ‘Hb. DC.’. Duplicates of King's collector 8637 are in BM, CAL, K and L and Scortechini 2104 in K, L and P. We select King's collector 8637 at G-DC (G00006111) as the lectotype because it is a good specimen. Xerospermum intermedium was first described by Radlkofer (1907) based on four collections, namely, Curtis 3436, Helfer KD 1005, Helfer KD 1006 and Kehding 90. Helfer KD 1005 (K000701838) is selected here as the lectotype because it is a better specimen in good condition. Radlkofer (1907) described Xerospermum brachyphyllum and cited Forbes 452 at Hb. DC. as the type. We also found duplicates in BM, BO and L. Therefore, we select the specimen at G-DC (G00006109) as the lectotype. Radlkofer (1910) cited Balansa 3419 from Tonkin and deposited at ‘Hb. Berol. and Hb. Boiss’, in the original description of Xerospermum tonkinense. We have not seen the material in B which may have been destroyed during World War II. Leenhouts (1983) referred to Balansa 3419 (G) as the holotype with isotypes at K and P. We assume that the lectotype was already designated at G by Leenhouts. However, we found that the specimen of Balansa 3419 comprises two sheets at G-BOIS. Following Article 9.17 of the ICN (McNeill et al. 2012), we select the specimen at G-BIOS (G00006123) as a second-step lectotypification. Page 5 of 6 15 Several type collections of Xerospermum testudineum were collected from Sumatra and Java and cultivated in the Bogor Botanic Gardens as cited by Radlkofer (1922), namely, Forbes 1216a (from Java meridionali-orientalis), Jelinek s.n. (from Java) and Teysmann s.n. (from Bogor Bot. Gard. III. 1.28, origin from Priaman; from Bogor Bot. Gard. III. H. 17, origin from Lampongs). Teysmann s.n. (M0224914) is selected here as the lectotype because it is the better specimen in having flowers, a clear label and a good distribution of duplicates in several other herbaria. Xerospermum xanthophyllum was first described by Radlkofer (1925), who cited specimens from plants cultivated in Bogor Botanic Gardens (Culta in Hort. Bogoriensi, n. III, i, 50a) and kept at Hb. Monac. We select Anon. 11 (M0224919) as the lectotype because it is a perfect specimen and congruent with the protologue. Gagnepain (1947) noted several collections made by Poilane in the protologue of Xerospermum donnaiense as the types, without indication of the herbarium. Specimens are present in BM and P. All were collected over a short period of time between February and March 1935 from the same locality in Vietnam. Poilane 24122, 24472 and 24489 have vegetative parts and inflorescences whereas Poilane 24682 also has fruits. The latter is selected as the lectotype because it is a good and clear specimen which may be helpful for species identification. Xerospermum poilanei was named for Poilane by Gagnepain (1947) based on two of Poilane’s collections, without indication of the herbarium. We select Poilane 1770 at P (P02297333) as the lectotype because it is in good condition. Acknowledgements We thank the directors and curators of BM, K and SING for access to specimens. This work was aided by the herbarium images and data available online from the following institutions: A, BM, C, FI, G, K, L, M, NY, P, U and US. We are grateful to Dr Paramjit Singh, Roxali Bijmoer, Dr Hans-Joachim Esser and Serena Lee for providing the type specimen images from CAL, L, M, and SING, respectively. We also thank Dr Brigitta de Wilde-Duyfjes and Dr David Simpson for their very helpful suggestions. Financial support was granted by the Post-Doctoral Program from Research Affairs and Graduate School, Khon Kaen University, Grant no. 58218 to the first author. References Adema, F., Leenhouts, P. W. & Welzen, P. C. van (1994). Sapindaceae. In: W. J. J. O. de Wilde (ed.), Flora Malesiana, Ser. 1, Spermatatophytes 11: 419 – 768. Noordhoff-Kolff, Djakarta [Jakarta]. © The Board of Trustees of the Royal Botanic Gardens, Kew, 2018 15 Page 6 of 6 Acevedo-Rodriguez, P., Welzen, P. C. van, Adema, F. & Ham, R. W. J. M. van der (2011). Sapindaceae. In: K. Kubitzki, (ed.), The Families and Genera of Vascular Plants 10: 357 – 407. Springer, Heidelberg. Blume, C. L. (1825). Bijdragen tot de Flora van Nederlandsch Indië. Ter Lands Drukkerij, Batavia. ____ (1847). Rumphia Vol. 3. C. G. Sulpke, Amstelodami. Cambessèdes, J. (1829). Mémoire sur la famille des Sapindacées. Mém. Mus. Hist. Nat. Paris 18: 1 – 50. Candolle, A. P. de (1824). Prodromus Systematis Naturalis Regni Vegetabilis. Sumptibus Sociorum Treuttel et Würtz, Parisii. Gagnepain, F. (1947). Sapindacées nouvelles ou litigieuses. Notul. Syst. (Paris) 13: 63 – 72. Hiern, W. P. (1875). Sapindaceae. In: J. D. Hooker (ed.), The Flora of British India 1: 668 – 699. L. Reeve & Co., London. King, G. (1896). Materials for a flora of the Malayan Peninsula. J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 65: 339 – 516. Kurz, W. S. (1871). On some new or imperfectly known Indian plants. J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 40: 45 – 78. ____ (1872). New Burmese plants. J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 41: 291 – 318. Leenhouts, P. W. (1983). A taxonomic revision of Xerospermum (Sapindaceae). Blumea 28: 389 – 401. ____ (1986). A taxonomic revision of Nephelium (Sapindaceae). Blumea 31: 373 – 436. Linnaeus, C. (1767). Car. a Linné Mantissa Plantarum. Generum Editionis vi. et Specierum Editionis. Impensis Direct. Laurentii Salvii, Holmiæ. McNeill, J., Barrie, F. R., Buck, W. R., Demoulin, V., Greuter, W., Hawksworth, D. L., Herendeen, P. S., Knapp, S., Marhold, K., Prado, J., Prud’homme van Reine, W. F., Smith, G. F., Wiersema, J. H. & Turland, N. J. (eds, 2012). International Code of Nomenclature for Algae, Fungi, and Plants (Melbourne Code), Adopted by the Eighteenth International Botanical Congress Melbourne, Australia, © The Board of Trustees of the Royal Botanic Gardens, Kew, 2018 KEW BULLETIN (2018) 73:15 July 2011. Regnum Veg. 154. Koeltz Scientific Books, Königstein. (http://www.iapt-taxon.org/ nomen/main.php). Pierre, L. (1894). Flore Forestière de la Cochinchine, Vol. 3. Octave Doin, Éditeur, Paris. ____ (1895). Flore Forestière de la Cochinchine, Vol. 4. Octave Doin, Éditeur, Paris. Radlkofer, L. (1879a). Über die Sapindaceen Holländisch-Indiens. Actes Congr. Int. Bot., Amsterdam 1877: 70 – 133. Sijthoff, Leiden. ____ (1879b). Nachträge zur Uebersicht der Sapindaceen Holländisch-Indiens. Actes Congr. Int. Bot., Amsterdam 1877: 216 – 254. Sijthoff, Leiden. ____ (1907). Sapindaceae novae Indicae et Malaicae ex Herbario Calcuttensi. Rec. Bot. Surv. India 3: 341 – 355. ____ (1910). Sapindacées nouvæ ex Indo-China, adjecto genere emendato. Notul. Syst. (Paris) 1: 298 – 306. ____ (1913). Sapindaceae Philippinenses novae II. In: A. D. E. Elmer (ed.), Leafl. Philipp. Bot. 5, pp. 1601 – 1616. Oriental Printing Co., Manila. ____ (1922). Sapindaceae asiaticae novae vel emendatae. In: F. Fedde (ed.), Repert. Spec. Nov. Regni Veg. 18: 332 – 344. ____ (1925). Sapindaceae tres Javanicae novae e tribu Nepheliearum. Flora 118 – 119: 399 – 401. ____ (1931). Sapindaceae I (Bogen 1 – 20). In: A. Engler (ed.), Das Pflanzenreich, Heft 98a. Verlag von Wilhelm Engelmann, Leipzig. ____ (1932). Sapindaceae IV (Bogen 51 – 60). In: A. Engler (ed.), Das Pflanzenreich, Heft 98a. Verlag von Wilhelm Engelmann, Leipzig. Ridley, H. N. (1933). Additions to the Flora of Borneo and other Borneo Islands: IV. Bull. Misc. Inform., Kew 1933: 190 – 202. Teijsman, J. E. & Binnendijk, S. (1851). Nieuwe Plantensoorten in ’s Lands Plantentuin te Buitenzorg. Natuurk. Tijdschr. Ned.-Indië 2: 303 – 310. Welzen, P. C. van (1999). Sapindaceae. In: T. Santisuk & K. Larsen (eds), Flora of Thailand 7: 169 – 250. Diamond Printing Co. Ltd., Bangkok.