RMC1WN2A–Sea lettuce, Ulva lactuca, anchored to a small rock, on a beach at low tide.
RM2RAHDMN–The lonely single yellow wall lettuce flower on a stalk
RFD8H0F7–Sea lettuce (Ulva lactuca)
RF2GYB3R7–Blüte des Stachel-Lattichs, Lactuca serriola, etwa 10 mm Durchmesser. Dieser Lattich kommt häufig in sonnigen, lückigen Unkrautfluren, an Wegrändern,
RF2PGA6TC–Seedlings lettuce oakleaf bio red Lactuca sativa vegetables young planting oak leaf green detail greenhouse foil field root crop farm farming garden s
RMMA5T0R–A plant of purslane bordering lettuce (Batavia 'Rouge Grenobloise'), harvesting green beans and potatoes (Suzanne 's garden, Mayenne, Fr).
RMFC6FN0–Romaine lettuce
RM2J6X5FB–Various salad vegetables including lettuce, spinach, coriander and spring onions growing in a no dig style vegetable garden in spring.
RF2B29GNW–Hydroponic farm salad plants on water without soil agriculture in the greenhouse organic vegetable hydroponic system young and fresh red oak lettuce s
RMCXT1W1–Boy holding a head of lettuce
RFHA4XHR–Gulley's Favorite Lettuce plants growing in Maple Valley, Washington, USA.
RM2GJA50J–Romaine Lettuce
RFEXW6RD–Flashy Trout's Back Lettuce plants growing in a raised bed vegetable garden in Issaquah, Washington, USA
RM2JRBDN5–USA, SE Alaska, Inside Passage, Wood Spit. Young red king crab aka Alaska king crab (Paralithodes camtschaticus) on common sea lettuce seaweed.
RM2C1B38N–Lactuca canadensis L Lactuca canadensis L.
RM2BXANP0–Lactuca papuana S Moore Mattf Lactuca papuana S Moore Mattf.
RM2AFJC2H–. Bulletin. s sp. ? Wild lettuce Lactuca canadensis L. Evening primrose Oenothera biennis L. Field corn.Sweet corn. This borer has not been found in any ofthe above weeds except where they were grow-ing near infested smartweed, and apparently itgoes to them in fall as a more desirable place tohibernate than the smartweed stems. It hasnot been found in the stems of any weeds wheresuch stems were hard and woody, although itmay be abundant in the softer parts of the sameplants. In some fields where the smartweedwas very heavily infested, the borers were foundfully as numerous in the stems of some
RM2BT58PF–Purple viper grass, Scorzonera purpurea, perennial lettuce, Lactuca perennis, blue catananche, Catananche caerulea, serrated-leaved chaetanthera, Chaetanthera serrata, and white prenanthes, Prenanthes alba. Handfinished chromolithograph by Henry Noel Humphreys after an illustration by Jane Loudon from Mrs. Jane Loudon's Ladies Flower Garden of Ornamental Perennials, William S. Orr, London, 1849.
RMM4XRFM–Purple viper grass, Scorzonera purpurea, perennial lettuce, Lactuca perennis, blue catananche, Catananche caerulea, serrated-leaved chaetanthera, Chaetanthera serrata, and white prenanthes, Prenanthes alba. Handfinished chromolithograph by Henry Noel Humphreys after an illustration by Jane Loudon from Mrs. Jane Loudon's Ladies Flower Garden of Ornamental Perennials, William S. Orr, London, 1849.
RF2PGJN79–Seedlings lettuce oakleaf bio red Lactuca sativa vegetables young planting oak leaf green detail greenhouse foil field root crop farm farming garden s
RF2BP5WK7–Hydroponic farm salad plants on water without soil agriculture in the greenhouse organic vegetable hydroponic system young and fresh red oak lettuce s
RM2JRBDHP–USA, SE Alaska, Inside Passage, Wood Spit. Young red king crab aka Alaska king crab (Paralithodes camtschaticus) on common sea lettuce seaweed.
RM2JCK7RM–French oak. A. Cross-section through the wood of the English oak (Quercus robur). Hf1 thin-walled, Hf 11 strongly thickened wood fibres, Hp) wood parenchyma, S) mirror fibres, G11) small vessels, a very large vessel leans against G1), the circumference of which is only somewhat indicated by the curved piece at the bottom left. B) Cross-section through the bast of the wild lettuce (Lactuca scariola). Bf) bast fibres, Bp bast parenchyma, M11) outer, M1 inner milky sap vessels, Rp) bark parenchyma, Hlf) wood fibres., Quercus robur, anonym (botany book, 1875), Stieleiche. A. Querschnitt durch das
RMW23NJJ–Archive image from page 176 of Das Leben der Pflanze (1906). Das Leben der Pflanze daslebenderpflan07fran Year: 1906 S)ic tflanjcn. 151 entroidlung im 'Jei= unb diottoi gleirf)5eitig bie I)üd)[len 3Infprüd)e an 9Räf)rftoff unb 3eurf)tigfeit macf)en. 2. tatt= unb (Stengelgemüje. a) atote, Lactiica sativa L., oon Lactüca scariola L., bcm wilben SatticE); im füblid)en uropa f)eimifd), fd)on üon bcn alten @rierf)en unb ?f{'6rmxn fultioiert. 3:eüpraft (um 312 d. ®t)r.) fannte 3 SSarietäten. ®ie Diafjenjurfit ber eujeit f)at auc biefc 3Irt mzx oerooUfommnet unb ben üerfd)iebenen Qmzdzn ber 2;reib=
RM2BTR670–Lactuca scariola.
RM2AGDGGB–. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. form beaks,may be a hybrid with L. spicata. 7. Lactuca sagittifolia Ell. Arrow-leavedLettuce. Fig. 4074. L. sagittifolia Ell. Bot. S. C. & Ga. 2: 253. 1821-24.Lactuca integrifolia Bigel. Fl. Bost. Ed. 2, 287. 1824. Not Nutt. 1818.L. elongata var. integ. T. & G. Fl. N. A. 2: 496. 1843. Biennial; stem glabrous throughout, or hirsutebelow, leafy nearly up to the usually panicula
RMPFBEFJ–. Descriptive catalog of vegetables. Commercial catalogs; Nurseries (Horticulture) Catalogs; Vegetables Seeds Catalogs; Seeds Catalogs; Fruit Catalogs; Herbs Catalogs. 54 ASSOCIATED SEED GROWERS, INC. LETTUCE Lactuca sativa The column of Days represents the time required to develop marketable heads from the planting of seed, under average conditions, but since maturity varies with weather and growing conditions, the figures indicate relative rather than exact periods. The letters b.s. indicate black seeded varieties, and w.s. white seeded. The Imperial strains and varieties developed by the la
RF2PGA99M–Seedlings lettuce oakleaf bio red Lactuca sativa vegetables young planting oak leaf green detail greenhouse foil field root crop farm farming garden s
RMMCTKTK–. Fie 162. A Teil des Blbd. von Andryala dentata Sibth. et Sra. - B Fr. dorselben. - C' Fr. ohne Pp. von Rfichardia iinoitana (L.) Eoth. - I> Fr. von Taraxacum vulgare (Lam.) Schrk. - £ Fr ohne Pp. von 6^W ^ ^''«^a marginaia Eaton. - F Fr. von ChondrUla juncea L. - 0 Fr. xon Lygodesmia extgua A. Gr. - H unte er lel derselben. - J, K Stb. und Ft. von Hieracium umbellatum L. - i Fr. von Mxdgedium alpmum (L.) Ca.s. --31 Fr. von Ceyis biennis L. - .V unterer Teil derselben. - 0 Fr. von Troximon ärandtßortou A.Gr. - P Qir^ von Lactuca virosa L. nebst Querschnitt. - R äußere Fr. ohne Pp. von Laun
RM2JRBDJ1–USA, SE Alaska, Inside Passage, Wood Spit. Young red king crab aka Alaska king crab (Paralithodes camtschaticus) on common sea lettuce seaweed.
RMW23604–Archive image from page 137 of Curtis, Cobb & Washburn's amateur. Curtis, Cobb & Washburn's amateur cultivator's guide to the flower and kitchen garden for 1878 curtiscobbwashbu1878curt Year: 1878 ' ' ' rf LETTUCE (Lactuca Sativa). German, Z,aiic/i. — French, Xaiwe. — Spanish, Lechuga. I'tie Lettuce is generally divkled into two classes: viz., Cabbage Lettuces and CDs Let- tuces. The Cabbaee have round heads and broad-spreading leaves; the Cos varieties have long heads, and upright, oblong leaves. Culture.—A very rich soii is necessary to produce fine head Lettuce. Its crisp and tender quali
RM2BTR66K–Lactuca scariola.
RM2AGDF61–. An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian. s spicatus Lam. Encycl. 3: 401. 1789.Mulgedium leucophaeuni DC. Prodr. 7 : 250. 1838.Lactuca lencophaea var. integrifolia A. Gray, Syn. Fl. I : Part 2, 444. 1884.Lactuca spicata integrifolia Britton, Mem. Torr. Club 5 : 350. 1894.L. spicata Hitchc.; Britt. & Brown, 111. Fl. 3 : 276. 1898. Annual or biennial; stem usually stout, gla-brous, 3°-i2° high, leafy up to the large,ra
RMPFEEYX–. Descriptive catalog of vegetables. Commercial catalogs; Nurseries (Horticulture) Catalogs; Vegetables Seeds Catalogs; Seeds Catalogs; Fruit Catalogs; Herbs Catalogs. 46 ASSOCIATED SEED GROWERS, INC. LETTUCE Lactuca sativa The column of Days represents the time required to develop marketable heads fiom seed, under average conditions, but since maturity varies with weather and growing conditions, the figures indicate relative rather than exact periods. The letters b.s. indicate black seeded varieties, and w.s. white seeded. The Imperial strains and varieties developed by the late I. C. Jagger,
RM2JRBDJ7–USA, SE Alaska, Inside Passage, Wood Spit. Young red king crab aka Alaska king crab (Paralithodes camtschaticus) on common sea lettuce seaweed.
RMW1BM74–Archive image from page 427 of Des plantes vénéneuses et des. Des plantes vÃnÃneuses et des empoisonnements qu'elles dÃterminent . desplantesvn00corn Year: 1893 â PC 1. 'â /' FiG. 43. â Lactuca virosa. â Laitue vireuse. (D'après Gourdon et Naudin)
RM2BTR666–Lactuca scariola.
RM2CE3BCC–. Plants and their uses; an introduction to botany . ^•^-^?^S^Ui^S: Fig. 75.—Lettuce (Luctuca salioa. Sunflower Family, CotnjMsitce). Plantduring early period of growth, showing the compacted rosette of leaves.(Xicholson.)—The plant is an annual, smooth throughout, attaininga height of about 1 m., flowers yellow. HERBAGE-VEGETABLES 73. Fig. 76.—Lettuce. Plant in flower and fruit. (Atkinson.)—This is thewild form known as Lactuca scariola from which the garden varietiesare believed to be derived. When growing in open land the leaves com-monly arrange thom.selves in two vertical rows with one ed
RMPFXF4T–. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Rhacophyllum lactuca, Stern. {Schi^nptpris lactuca. ^ Fucoi- des cris pus. Gutb ; Hymeno- phyllites lactuca Lesq. Geol. 111., '^IV, 418; Pachy- phyllum lactuca^ Lesq. Geol. Fa., , -, .- 1858, p. L'^Sg4^S^:^a^^iypj^;it^^ /^^.^. rl. ^, l 863, plate 8, tig. 4, 5, from Gate Vein, New FhiladeJphia, iSchuylkill Co., Fa. Not scarce in the European and American coal measures. Lesquereux has seen a iragment with leaves, or wings, at- tached (?) to a broad common ra
RMW1CFP4–Archive image from page 63 of Descriptive catalog of vegetables (1947). Descriptive catalog of vegetables . descriptivecatal1947asso Year: 1947 60 ASSOCIATED SEED GROWERS, INC. A southern field of shipping lettuce LETTUCE Lactuca sativa The column of Days represents the time required to develop marketable heads from the planting of seed, under average conditions, but since the maturity of the New York types varies with weather and growing conditions in the lettuce-producing sections of California and Arizona, the figures indicate relative rather than exact periods. The letters b.s. indicat
RM2BTR66M–Lactuca scariola.
RMRDJPC6–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. Wild Opium. Fig. 4073. Lactuca canadensis L. Sp. PI. 796. 1753. Lactuca elongata Muhl.; Willd. Sp. PI. }i^s- 1804. Lactuca canadensis montana Britton, in Britton and Brown, 111. Fl. 3: 274. 1898. Biennial or annual, glabrous throughout, some- what glaucous; stem leafy up to the inflorescence, 3°-io° high, branching above into a narrow pan- icle. Leaves mostly s
RMPFXH6P–. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. piJ: pi. 9, f. 5, 5a; also Geol. bur. Ky. Vol. 4; in loioest coals ex- posed at the Salines of the Kenawha, W. N^.—XIII Ilymenophyllites inflatum. Rhac. inflatum. XIIL Hymenophyllites lactuea, Rhacophyllum lactuca. XIII HymenophijlUtes pinnatiMus. Sphen. tridactylites. XI Hymenophyllites -? Wayneslurgcoal^ (K, 59.) XV, Hyolithellus micans {Hyolithes micans, Billings, 1872, Can. Nat. [2] 6, 213, 215, W If- figs.3^, I.) Walcott, Bull. U. S. G. S. No. 30, page 1
RMT3XF4G–Archive image from page 405 of Die Pflanzenfeinde aus der Klasse. Die Pflanzenfeinde aus der Klasse der Insekten. Ein nach Pflanzenfamilien geordnetes Handbuch sämmtlicher auf den einheimischen Pflanzen bisher beobachteten Insekten zum Gebrauch für Entomologen, Insektensammler, Botaniker, Land- und Forstwirthe und Gartenfreunde diepflanzenfeind00kalt Year: 1874 392 Klasse I. Zweisanieublättrige Pflanzen. 57. Gattung. Lattich. Salat. Lactuca. b. Falte r. I. Arctia Caja. L. (Vergl. Kubus, Sambucus.) '2. Arctia villica, L. (Vergl. Fragaria.) 3. Arctia Hebe, L. Die überwinterten Raupen, welche s
RM2BTR66H–Lactuca scariola.
RMRDJPCD–. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 320 CICHORIACEAE. Vol. III. 6. Lactuca canadensis L. Wild or Tall Lettuce. Wild Opium. Fig. 4073. Lactuca canadensis L. Sp. PI. 796. 1753. Lactuca elongata Muhl.; Willd. Sp. PI. }i^s- 1804. Lactuca canadensis montana Britton, in Britton and Brown, 111. Fl. 3: 274. 1898. Biennial or annual, glabrous throughout, some- what glaucous; stem leafy up to the infloresc
RMRDWPPP–. Illustrations of the British flora: a series of wood engravings, with dissections, of British plants. Botany; Botany. 5S7. Hypochceris maculala, L. Spotted HypocJuere; Y.. 589. Lactuca Scariola, L. L. S^rrio'a, L. PHcMy Lettitce ; V. L Z. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Fitch, W. H. (Walter Hood), 1817-1892; Smith, George Worthington, 1835-1917; Bentham, George, 1800-1884. Handbook of the British flora. Lo
RM2BTR698–Lactuca virosa.
RMRD9323–. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. Rhacophyllum lactuca, Stern. {Schi^nptpris lactuca. ^ Fucoi- des cris pus. Gutb ; Hymeno- phyllites lactuca Lesq. Geol. 111., '^IV, 418; Pachy- phyllum lactuca^ Lesq. Geol. Fa., , -, .- 1858, p. L'^Sg4^S^:^a^^iypj^;it^^ /^^.^. rl. ^, l 863, plate 8, tig. 4, 5, from Gate Vein, New FhiladeJphia, iSchuylkill Co., Fa. Not scarce in the European and American coal measures. Lesquereux has seen a iragment with leaves, or wings, at- tached (?) to a broad common ra
RM2BTR66T–Lactuca scariola.
RMRD7CH4–. Electrolytes in biological systems, incorporating papers presented at a symposium at the Marine Biological Laboratory in Woods Hole, Massachusetts, on September 8, 1954. Electrophysiology; Electrolytes; Electrolytes; Electrophysiology; Physiology, Comparative. 20 30 - HOURS - SODIUM 100 T 90 80 70 H 60 50 40 H 30 20. 10 20 30 - hours- Figs. 13 {top) and 14. Influence of 4,6-clinitro-o-cresol (DNC) on the potassium and sodium contents of Viva lactuca. noted that the kinetics of potassium loss are distinctly different from those of sodium uptake in the presence of this 'decoupling agent'. It s
RM2BTR679–Lactuca scariola.
RMRENEP2–. Common weeds of Canada [microform] : a pocket guide. Weeds; Mauvaises herbes, Lutte contre les; Weeds; Mauvaises herbes. 128 NOXKJUS WEEDS l. W ESTER. CANADA BLUE LETTUCE. Lactuca pulchdla, (DC). Root. Deep-rooted, with fleshy runniriK rootstocks. Stem. Krect, 2-. feet high, leafv below, smooth and Khuicoiis: tilled with milky juice. Leaves.—Entire, linear-lanceolate or oblong, simply or runciiiatelv dentate, or pinnalifid, with stem- leaves less divided and sessile. Flowers. Heads nearly 1 inch across, pale-blue, few, on scaly i)eduncle! in a narrow'panicle. Fruit.-Head of seeds. See-s.
RM2BTR66E–Lactuca scariola.
RMRD93X1–. A dictionary of the fossils of Pennsylvania and neighboring states named in the reports and catalogues of the survey ... Paleontology. piJ: pi. 9, f. 5, 5a; also Geol. bur. Ky. Vol. 4; in loioest coals ex- posed at the Salines of the Kenawha, W. N^.—XIII Ilymenophyllites inflatum. Rhac. inflatum. XIIL Hymenophyllites lactuea, Rhacophyllum lactuca. XIII HymenophijlUtes pinnatiMus. Sphen. tridactylites. XI Hymenophyllites -? Wayneslurgcoal^ (K, 59.) XV, Hyolithellus micans {Hyolithes micans, Billings, 1872, Can. Nat. [2] 6, 213, 215, W If- figs.3^, I.) Walcott, Bull. U. S. G. S. No. 30, page 1
RM2BTR66X–Lactuca sagittaefolia.
RMRH951N–. Botanisk tidsskrift. Botany; Plants; Plants. 30. Løvskov af andre Træer og Blandingsskov 567 folia, Circæa alpina. Epilobium montanum, Geranium silvaticum, G. Robertianum, Geum urbanum, Impatiens noli tangere, Lactuca muralis, Mercurialis perennis, Milium effusuni, Orobus vernus, Paris, Polygo- natum verticillatum, Pulmonaria officinalis, Scrophularia nodosa, Stachys silvatica, Triticum canmum, Valeriana officinalis og Viola mirabilis. Ær (Acer pseudoplatanus) omtaltes S. 87. Det er nævnt, at den i mange Skove vokser op i Mængde ved Selvsaaning (Billeder S. 88 og 535). De Smaaholme, som man
RM2BTR677–Lactuca sagittaefolia.
RMRJ4EGP–. [Report of a voyage made to the Canadian Labrador coast ; Catalogue of plants and birds of the north shore] [microform]. Botany; Birds; Botanique; Oiseaux. wmm "l^lpi^iWPiippP 143 4 P. serptntaria, YaTBh. Island of OrleanB, August, 188i. 34. Taraxacum, Hall. 1 2. dent-Ieoiiia, Dejjf. Quebec, May, October, 1884. 35. Lactuca, Tourn. 1 L. leucopJiaea, Gray. Island of Orleans, July, 1884, 36. SoNCHus, Linn. 1 S. oleraceusy Linn. Quebec, August, 1884. 2 S. aaper, Vill, Quebec, August, 1884. 3 S. arvenait, Linn. Quebec, August, 1883. 37. Tragopogon, Linn. 1 T. porrifoUtM, Linn. Lotbinidre, Au
RM2BTR66D–Lactuca scariola.
RMRHB5EP–. Botanical gazette. Plants. VOL. VIII Sl.OO per year. NO. 1. Single Number 10 Cents. The Botanical Gazette.. JANUARY, 1883. COITTEITTS. Some N. Am. Botanists. I. C. S. Kaflnesquc 1*9 Hibernaculum of Asarum Canaden.se. Aug. F. FoersU 153 The Lignifled Snake from Brazil I5* Epiphegus Virginiana (with plate.) S. T. Fergm 154 Kentucky Fungi. A.P.Morgan 15<5 Notes from Franconia. W.W.Bailey 157 General Notes J*' Lactuca Scariola, L— Gentiana crinita.—Lactuca Scariola, L.—Ejection of the Seed in Cereus Emoryi, Eng—Alaska Ferns.—Sound of Discharging As- cospores.—Marked Protandry. Editorial Notes
RM2BTR66F–Lactuca scariola.
RMRMXDAW–. Annales des sciences naturelles. Plants; Biology. 130 p. LAVIALLE Ce qui a «''t(' dit s'appliquo à toutes les autres espèces étudiées. L'appareil sécréteur fait complètement défaut dans ce genre. Les espèces dont les noms suivent ne présentent pas de différences sensibles. Ce sont : 5. arcen.sish., S. asper Gaeuts., S. frutirosush.^S. maritimus L., .S. olemreusL., S.palitstrisL., S. P/innieri St-Lag., .S. squairosus D.C., S. tenerrimiis L. Genre Lactuca L. Péricarpe. — On ne trouve dans le parenchyme carpellaire que deux faisceaux situés au niveau des deux nervures médianes. De bonne heure s
RM2BTR669–Lactuca sp.
RMRMXDAJ–. Annales des sciences naturelles. Plants; Biology. Fig. 95. — l.ncluca acariola. Coupe Iransv. du fruit im'ir : péi péricarpe ; ép, épidernii': cp, côte principale pourvue d'un f^'ros paquet de fibres ; r.s, côte secondaire ; fp, faisceau car- pellaire ; t(j, tégument ; /<, faisceau du raphé ; alb, résidu de l'albumen ; et, cotylédons. — Gr. : 70. Fig. 96. — Lactuca perenms. Coupe transv. du fruit mûr : péi péricarpe; ]tf, paquet de fibres d'une cote prin- fipale : fp, faisceau carpellaire ; ép. é])iderme : t(j , tégument ; ft, faJKcau du raphé; alb. résidu de l'albu- iiiin ; et, cotyléd
RM2BTR66P–Lactuca scariola.
RMRHT36E–. Beitrge zur wissenschaftlichen Botanik. Plants. 22 Wilhelm Hirsch, B. Faden haare. Bei einigen Arten der Cichoriaceen, z. B. Lactuca virosa, Picris hieracioides, Crepis u. a,, treten neben den von War- ming in seiner Arbeit über die Kompositen beschriebenen Haar- körpern Trichome von fadenförmiger Gestalt auf, die, soweit ich sie untersucht habe, basipetales Wachstum zeigen. Es treten hier immer am Grunde des Haares eine grosse Zahl neuer Wände auf. Die Zellen sind an der Basis klein, die Querwände eng aneinander gerückt;^ die oberen Zellen sind dagegen viel länger. Bei Picris hieracioides s
RMRCRJE7–. Descriptive catalog of vegetables. Commercial catalogs; Nurseries (Horticulture) Catalogs; Vegetables Seeds Catalogs; Seeds Catalogs; Fruit Catalogs; Herbs Catalogs. 54 ASSOCIATED SEED GROWERS, INC. LETTUCE Lactuca sativa The column of Days represents the time required to develop marketable heads from the planting of seed, under average conditions, but since maturity varies with weather and growing conditions, the figures indicate relative rather than exact periods. The letters b.s. indicate black seeded varieties, and w.s. white seeded. The Imperial strains and varieties developed by the la
RM2BTR62T–Lactuca canadensis L.
RMRCWMBR–. Descriptive catalog of vegetables. Commercial catalogs; Nurseries (Horticulture) Catalogs; Vegetables Seeds Catalogs; Seeds Catalogs; Fruit Catalogs; Herbs Catalogs. 46 ASSOCIATED SEED GROWERS, INC. LETTUCE Lactuca sativa The column of Days represents the time required to develop marketable heads fiom seed, under average conditions, but since maturity varies with weather and growing conditions, the figures indicate relative rather than exact periods. The letters b.s. indicate black seeded varieties, and w.s. white seeded. The Imperial strains and varieties developed by the late I. C. Jagger,