Solanaceae Source

A global taxonomic resource for the nightshade family

Solanum albornozii

Citation author: 
Wrightia 2: 178. 1961.
Ecuador. Loja: among bushes in clearings on upper slopes of Villonaco, 15 km from Loja on road to Catamayo, 17 Mar 1958, D.S. Correll and G. Albornoz E381 (holotype, LL [Correll neg. 177, BM000882152, NY, UC-1152162]; isotypes, F-1561939, G-87701, LL-3 sheets [Correll neg. 176, BM000882151, NY, UC-1152162; Correll neg. 449, BM000882149, UC-1152162, NY; Correll neg. 450, BM000882150, NY, UC-1152162], MO-1772288, NY00259403, U0006803, UC-1176448, US00588700).
Last edited by: 
Spooner, D.M.
Written by: 
Spooner, D.M. & M. Ames
Herbs 0.4-1 m tall, erect. Stems 3-5 mm in diameter at base of plant, winged or unwinged, the wings 0-0.21 mm wide, glabrous.
Sympodial structure: 
Sympodial units tri- to plurifoliate, not geminate.
Leaves odd-pinnate, the blades 10.5-26 x 6.6-14 cm, light green abaxially and dark green adaxially, coriaceous and shiny, glabrous adaxially, glabrous to glabrescent with very short hairs abaxially; lateral leaflet pairs 5-7, increasing in size toward the middle of leaf and then decreasing toward the leaf base, with the terminal leaflet generally subequal or smaller to the laterals; most distal lateral leaflets 3-8.5 x 0.7-2.2 cm, elliptic, the apex acute to acuminate, the base petiolulate or sessile and slightly decurrent on the rachis, attenuate to rounded, asymmetric with more tissue on the basiscopic side; terminal leaflet 3.7-6.5 x 0.9-2 cm, elliptic, the apex acute to acuminate, the base cuneate; interjected leaflets 14-85, sessile to short petiolulate, ovate to orbicular; petioles 1-5.5 cm, glabrous. Pseudostipules 3-5 mm long, glabrous to subglabrous.
Inflorescences 6-10 cm, terminal with a subtending axillary bud, generally in distal half of the plant, usually forked, with 22-86 flowers, with all flowers apparently perfect, the axes glabrous; peduncle 0.5-10.4 cm long; pedicels 10-24 mm long in flower and fruit, spaced 5-10 mm apart, articulated high in the distal half.
Flowers homostylous, 5-merous. Calyx 4-9 mm long, the tube 1-3 mm, the lobes 2-5 mm, ovate to lanceolate, the acumens 0.4-3 mm long, glabrous. Corolla 2-3.7 cm in diameter, pentagonal to rotate-pentagonal, white with a lilac streak on the back of the lobes, the tube 1-2 mm long, the acumens 0.5-0.8 mm long, the corolla edges flat, slightly folded dorsally, glabrous abaxially and adaxially. Stamens with the filaments 1-2 mm long; anthers 4-8 mm long, lanceolate, connivent, yellow, poricidal at the tips, the pores lengthening to slits with age. Ovary glabrous; style 3-10 mm x ca. 1 mm, exceeding stamens by 0.9-4 mm, straight, glabrous; stigma clavate to capitate.
Fruit an ovoid berry, 1.1-1.4 cm in diameter, medium green, 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: Spooner et al. 5030 (CIP) (Hijmans, et al. 2007)


Ecuador (Provs. Loja and Azuay), among bushes on slopes, 2350-3400 m in elevation.

Flowering and fruiting from March to July.

Solanum albornozii is a member of Solanum sect. Petota Dumort., the tuber-bearing cultivated and wild potatoes. 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 albornozii is morphologically similar to S. augustii; both have white corollas with purple stripes and a similar shape. However, they differ in the shape of the fruits, with S. augustii having globose berries and S. albornozii ovoid berries.


Correll, D.S. 1962. The potato and its wild relatives.
Contr. Texas Res. Found., Bot. Stud. 4: 1-606.

Ochoa, C.M. 1999. Las papas de Sudamerica: Perú.
Centro International de La Papa (CIP), Lima, Perú.

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.

Wed, 2013-11-20 10:57 -- sandy
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