Jaltomata lomana Mione & S. Leiva |
Novon 10:
53-59. 2000 |
Link to Jaltomata hompage |
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, Connecticut 06050-4010, United States of America. |
Link to Jaltomata species of the Peruvian lomas habitat |
Link to Jaltomata of Ancash, Peru |
Rare species of one fog-dependent island of vegetation in the coastal desert of Peru. First collected in 1938 but not collected again until 1998 during an expedition funded by the National Geographic Society.
| Character | description |
|---|---|
| Habit & Height | shrub to 80 cm |
| Young axes | Young axes, peduncles, pedicels, leaves and calyx nearly glabrous, the finger hairs to 0.15 mm long where present. |
| Woody axes | Larger branches glabrous, terete. |
| Leaves | Leaves alternate, often geminate, blade elliptical to ovate, to 6 X 3.4 cm, the margin entire, ciliolate with finger hairs to 0.15 mm long, the apex acute, the base symmetrical to somewhat oblique; petiole to 7 mm long. |
| Flowers Per Inflorescence | Inflorescence axillary or less commonly arising from a stem dichotomy, umbellate, 5 to 7-flowered. |
| Peduncle & Pedicel | Peduncle 3--8 mm long; pedicel 5--14 mm long. |
| Calyx | Calyx at anthesis green, 3--4.8 mm from pedicel to tip of lobe, ciliolate with finger hairs to 0.1 mm; 8--11 mm in diameter on mature (?) fruit. |
| Corolla shape including lobes/lobules, and size | Corolla 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, 5-lobed, 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. |
| Corolla color | white |
| Anther length & color | anthers 0.6--1.5 mm long |
| Stamens | Stamens 5.5--6.5 mm long; filaments villous on proximal 1/2, finger hairs to 0.75 mm long |
| Stigma | capitate, shallowly bilobed, 0.36--0.51 mm wide, the papillae (Mione et al. 631) 20--25 µm long |
| Style length | Style 4.7--5.4 mm, slender and straight |
| Disk around ovary | disk at base of ovary |
| Nectar | no data |
| Herkogamy? | no data |
| Fruit color (at maturity) and size | Berries (mature?) 4--6 mm in diameter. Fruit color (no data) likely orange. |
| Seeds | no data |
| Chromosome number | no data |
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). 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 Jan. 1998, Leiva et al. 2140 (F, HAO), Mione et al. 631 (MOL, NY).