Solanum plumense

Solanum plumense
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Formal description
Habit
Shrubs or small trees to 5 m high, unarmed. Trunks smooth; bark of older stems smooth, cinereous;
young branches terete, pale yellowish pulverulent, with hairs sessile and short-stalked, porrect-stellate,
multangulate and echinoid.
Sympodial Structure
Sympodial units plurifoliate, axillary leaves absent.
Leaves
Leaves simple, the blades usually 12-24 x 6-8 cm, ca. 2.5-3 times as long as wide, ovate-lanceolate to
broadly elliptic, chartaceous, glabrate adaxially, with hairs sparse, appressed, minute, mostly porrectstellate, minutely appressed-pubescent abaxially, with hairs mostly porrect-stellate, some echinoid;
main lateral veins 5-6 on each side of midvein; base abruptly short and narrowly attenuate; margins
entire; apex long-acuminate; petioles 3-8 cm, 1/5-1/2 the length of the blades, slender, minutely
pubescent, with hairs short-stalked, mostly multangulate and echinoid.
Inflorescences
Inflorescences 7-15 cm long, pseudo-terminal, becoming lateral due to continued growth of stem,
several times dichotomously branched, with more than 100 flowers, the axes unarmed, minutely
puberulent on peduncle, with hairs sessile and short-stalked, porrect-stellate, multangulate and
echinoid, more densely pubescent to tomentose on branches and pedicels, with hairs mostly
multangulate and echinoid; peduncle 4-8 cm, 1-3 mm thick; rachis 3-6 cm; pedicels 3-8 mm long, closely
spaced 0.5-3 mm apart, articulated at the base.
Flowers
Flower buds ca. 4 mm long, globose or somewhat elongate, pubescent, the hairs appressed,
multangulate and echinoid. Flowers all apparently perfect; calyx ca. 2.5-2.8 mm long, lobed 1/3-1/2 way
to the base, minute, subcampanulate, chartaceous, the tube 1.75-2 mm, the lobes 0.6-0.9 x 1.1-1.3 mm in
flower, 1.2-1.5 x 1.2-1.6 mm in fruit, ovate, acute or obtuse, stellate-pubescent abaxially, with hairs
multangulate and echinoid, minutely stellate-pubescent toward apices adaxially. Corolla 1.2-1.6 cm in
diameter, 4.5-9 mm long, long-exserted from calyx at anthesis, stellate-rotate, chartaceous, white, the
tube 1-3 mm, the lobes ca. 2.75-5.25 x 1-3.75 mm, ovate-lanceolate, acute to acuminate at apices,
stellate-pubescent abaxially, with the hairs multangulate and echinoid, minutely stellate-pubescent
toward apices adaxially. Stamens with filaments 1.6-2.1 mm, glabrous, inserted on corolla tube 1-1.3
mm above the base; anthers 2.1-2.9 x 0.75-0.9 mm, oblong, somewhat blunt-tipped, yellow, free,
glabrous, dehiscing by large introrse apical-lateral pores that turn into longitudinal slits with age. Ovary
conical, densely stellate-pubescent to tomentose; style ca. 5-6.5 x 0.25-0.4 mm, cylindrical, stellatepubescent to tomentose; stigma subcapitate.
Fruits
Fruit a fleshy berry, 0.9-1.1 cm in diameter, subglobose, obtuse at apex, greenish, probably yellow when
ripe, sparingly pulverulent.
Seeds
Seeds 1.9-2.6 x 1.7-2 mm, reniform, deltoid or suborbicular, yellowish brown, the testa honeycombed
reticulate-punctate.
Type information 1
Isotyp e for Solanum plumense Fernald
Catal og N u mb er: US 358601
Col l ecti on : Smithsonian Institution, National Museum of Natural History, Department of Botany
Veri fi cati on Degree: Original publication and alleged type specimen examined
Prep arati on : Pressed specimen
Col l ector(s): E. W. Nelson
Year Col l ected : 1895
Local i ty: About Pluma., Oaxaca, Mexico, North America
El evati on (m): 925 to 1480
References
1. © Smithsonian Institution, National Museum of Natural History, Department of Botany, some
rights reserved