Solanaceae Source

A global taxonomic resource for the nightshade family

Solanum infundibuliforme

Citation author: 
Anales Mus. Nac., Santiago de Chile 1891: 65. 1891.
Chile [Bolivia]. [Tarapacá]: Calcalhuay [Calcalaguai, in Bolivia near Chilean border, ca. 19°50'S, 68°20'W], [Jan 1886 or Mar 1885, see Hawkes and Hjerting 1969: 276], R.A. Philippi s.n. (lectotype, SGO-055467 [F unnumbered neg., F-1373173], designated by Hawkes and Hjerting, 1969: 276).
Last edited by: 
Spooner, D.M.
Written by: 
Spooner, D.M. & A. Clausen
Herbs 3-30 cm tall, but in sunny conditions usually less than 20 cm tall, decumbent to erect. Stems 1.5-4 mm in diameter at base of plant, green, unwinged, sparsely to densely pubescent with short whitish scabrous hairs; tubers typically borne singly at the end of each stolon.
Sympodial structure: 
Sympodial units tri- to plurifoliate, not geminate.
Leaves odd-pinnate, the blades 3.8-13 x 1.5-7.6 cm, green, membranous to chartaceous, pubescent adaxially and abaxially with hairs like those of the stems, some specimens ciliate at the margins; lateral leaflet pairs 2-5, often subequal except for the most proximal 1-2 pairs that are greatly reduced in size; most distal lateral leaflets 0.7-4.2 x 0.3-1.1 cm, narrowly elliptic to linear, the apex acute to obtuse, the base oblique and broadly decurrent; terminal leaflet 2-6 x 0.2-1.1 cm, narrowly elliptic to linear, the apex acute to obtuse, the base attenuate; interjected leaflets typically absent, rarely up to 6, sessile to short petiolulate, ovate to orbicular, the petiolules 0-5 mm; petioles 0.5-2.8 cm, pubescent as the stems. Pseudostipules 2-11 mm long, pubescent with hairs like those of the stem.
Inflorescences 2-9 cm, terminal with a subtending axillary bud, generally in distal half of the plant, usually forked, with 3-9 flowers, with all flowers apparently perfect, the axes pubescent with hairs like those of the stem; peduncle 0.5-5.5 cm long; pedicels 0.9-2.5 mm long in flower and fruit, spaced 1-10 mm apart, articulated at or distal to the middle.
Flowers homostylous, 5-merous. Calyx 5-8 mm long, the tube 1-2 mm, the lobes 3-7 mm, acute to long attenuate, the acumens 2-5 mm long, pubescent with hairs like those of the stem. Corolla 1.5-2.8 cm in diameter, substellate to pentagonal to rotate, white to white tinged with blue or purple to entirely blue or purple adaxially and abaxially, the tube 1-2 mm long, the acumens 0.1-0.3 mm long, the corolla edges flat, not folded dorsally, glabrous adaxially, minutely puberulent abaxially, especially along the midribs, ciliate at the margins, especially at the tips of the corollas. Stamens with the filaments 1-2 mm long; anthers 4-6 mm long, lanceolate, connivent, yellow, poricidal at the tips, the pores lengthening to slits with age. Ovary glabrous; style 7-10 mm x ca. 1 mm, exceeding stamens by 3-5 mm, straight, glabrous; stigma clavate to capitate.
Fruit a globose berry, 0.8-1 cm in diameter, green when ripe, often with scattered white dots, glabrous.
Seeds from living specimens ovoid and ca. 2 mm long, whitish to greenish in fresh condition and drying brownish, with a thick covering of “hair-like” lateral walls of the testal cells that make the seeds mucilaginous when wet, green-white throughout; testal cells honeycomb-shaped when lateral walls removed by enzyme digestion.
Chromosome number: 

2n = 2x = 24 voucher: Okada 7630 (BAL) (Hijmans, et al. 2007)


Solanum infundibuliforme occurs from central Bolivia to northern Argentina, in dry rocky areas without vegetation, among spiny shrubs or cacti, or at the edges of cultivated fields or roadsides, occasionally within a cultivated field, in river beds or along streamsides, often in disturbed soil; 2350-4300 m in elevation.

Flowering and fruiting from January to April.

Solanum infundibuliforme is a member of Solanum sect. Petota Dumort., the tuber-bearing cultivated and wild potatoes. Within sect. Petota, Solanum infundibuliforme is a member of a very diverse clade related to the cultivated potato. On a higher taxonomic level, it is a member of the informally-named Potato Clade, a group of perhaps 200-300 species that also includes the tomato and its wild relatives (Bohs, 2005).


Solanum infundibuliforme is a very distinctive wild potato species with its narrowly elliptic to linear leaves. It frequently grows with S. acaule, S. brevicaule, S. boliviense, S. oplocense and S. viirsooi. It is most similar to S. viirsooi from which it can be differentiated by its decumbent habit, its generally narrower and smaller number of lateral leaflets and the inflorescences situated in the distal part of the plant. The type specimen was collected in Chile when collected in 1885 or 1886 but this locality is now part of Bolivia.


Bohs, L. 2005. Major clades in Solanum based on ndhF sequences.
Pp. 27-49 in R. C. Keating, V. C. Hollowell, & T. B. Croat (eds.), A festschrift for William G. D’Arcy: the legacy of a taxonomist. Monographs in Systematic Botany from the Missouri Botanical Garden, Vol. 104. Missouri Botanical Garden Press, St. Louis.

Hijmans, R., T. Gavrilenko, S. Stephenson, J. Bamberg, A. Salas & D.M. Spooner 2007. Geographic and environmental range expansion through polyploidy in wild potatoes (Solanum section Petota).
Global Ecol. Biogeogr. 16: 485-495.

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