Jaltomata lomana Mione & S. Leiva
Peru
revised Feb 2022
Link to Jaltomata homepage
The information on this page may be cited as a communication with
professor Thomas Mione, Central Connecticut State University, Biology Department, Copernicus Hall, 1615 Stanley Street, New Britain, CT 06050-4010 USA, and
Segundo Leiva G., Universidad Privada Antenor Orrego, Av. América Sur 3145, Casilla postal 1075, Trujillo, Peru

Novon 10: 53 - 29. 2000
Link to Jaltomata of department Ancash, Peru
Link to Jaltomata species of the Peruvian lomas formations
Rare species known from only one of fog-dependent island of vegetation, a lomas formation, in the coastal desert of Peru. First collected in 1938 but not collected again until 1998 during an expedition by T. Mione, S. Leiva & L. Yacher funded by the National Geographic Society.
Figure 1. Jaltomata lomana. Flowers, branches and leaves. Photo by Segundo Leiva G., provided to Thomas Mione without collection number.
Figure 2. Illustration by Segundo Leiva G., originally published in Novon 10: 53-59. 2000

description:

Character Description Figures
Habit & Height
shrub to 80 cm  
Branches, young
 Young axes, peduncles, pedicels, leaves and calyx nearly glabrous, the finger hairs to 0.15 mm long where present.  
older
glabrous, terete  
Leaves, size
the blade to 6 X 3.4 cm, ,  
shape the margin entire, blade elliptical to ovate, the apex acute, the base symmetrical to somewhat oblique  
arrangement and hairs alternate, often geminate, the margin ciliolate with finger hairs to 0.15 mm long  
petiole to 7 mm long  
Inflorescence
Inflorescence axillary or less commonly arising from a stem dichotomy, umbellate, 5 to 7-flowered  
peduncle
 peduncle 3 - 8 mm long, nearly glabrous, the finger hairs to 0.15 mm long where present  
pedicel
 pedicel 5 -14 mm long, nearly glabrous, the finger hairs to 0.15 mm long where present  
Calyx when flowering, color & size
 green, 3--4.8 mm from pedicel to tip of lobe, ciliolate with finger hairs to 0.1 mm  
shape / position during anthesis    
at fruit maturity 8--11 mm in diameter on mature (?) fruit  
Corolla color
 white with 10 green maculae in throat  
shape and size
 short-tubular with a spreading limb, the tube 1.6 X 4.0--4.3 mm at base (obscured by pressing), the limb 11--14 mm in diameter,  
lobes/lobules
 5-lobed  
hairs
adaxially with finger hairs 0.12 mm long, erect and abundant on limb, absent in tube, abaxially with finger hairs 0.09 mm long, erect and concentrated on veins, margins ciliate with both finger and branchlet hairs 0.12 mm long.  
no  
Corona
 no  
Stamen length including anther
 stamens 5.5 - 6.5 mm long  
length stamens exserted beyond distal end of corolla (applicable if corolla is tubular or campanulate)    
position of stamens: a) before anthers dehisce, b) after anthers dehisce    
base expanded laterally?    
filaments villous on proximal 1/2, finger hairs to 0.75 mm long  
anther color    
anther size anthers 0.6--1.5 mm long  
anther mucronate/mucronulate    
insertion of filament into anther    
anthers of a flower open simultaneously? No, based on photo that is Figure 1.  
pollen quantity per flower
no data
  
pollen grain size
no data
  
Gynoecium
    
Stigma
 capitate, shallowly bilobed, 0.36-0.51 mm wide,
the papillae (Mione et al. 631) 20-25 µm long		  
Style
4.7 - 5.4 mm long, slender and straight  
Ovary
disk at base of ovary  
Ovules per ovary
no data
  
Nectar red/orange nectar was not observed  
Herkogamy
Yes, a few mm, based on the photo shown as Figure 1
  
Protogyny Yes, based on the photo shown as Figure 1  
Fruit color (at maturity) and size
orange; berries (mature?) 4-6 mm in diameter  
Infructescence
    
Seeds per fruit
    
Seed Size
no data
 
Chromosome number
no data
 
Growability in Connecticut, USA
no data
  
How long does it take from flower to ripe fruit?
no data
  
Self-Compatible?
no data
  
Seed Germination
no data
  
Figure 3. Jaltomata lomana. Fruit photographed by Segundo Leiva G., without collection number.

 

Stalked multicellular glands 55-75 µm long, abundant on both faces of the young leaves and calyx, and the abaxial face of the corolla (Mione et al. 631).

Distribution and Habitat. Known only from a single small mountain on the coast, the plant community of which is fog-dependent and therefore known as a lomas formation (Rundel et al., 1991, Leiva González, Zapata Cruz et al. 2008). Flowering in January and September, and fruiting in September.

Jaltomata lomana is an erect, nearly glabrous shrub with petioles to 7 mm long and a white, short-tubular corolla having a spreading limb 11-14 mm in diameter. The type specimen of J. lomana (Stork et al. 9183) was considered to represent Saracha dentata Ruiz & Pavon (Macbride, 1962), but the latter species, now J. dentata (Ruiz & Pavon) Benítez, is procumbent, has rotate-campanulate purple corollas, and does not occur in lomas formations.

Paratypes. PERU. Ancash: Prov. Casma, km 350 of PanAmerican highway, walk ca. 4 km northwest across desert to and up Lomas de Mongon, 630 m, growing in the protection of boulders, not on the open hillside, 20 January 1998, Leiva et al. 2140 (F, HAO), Mione et al. 631 (MOL, NY).

Literature Cited