Endemic to Jamaica, in moist crevices and hilltops on limestone, from 500-1000 m.
Solanum troyanum is a member of the S. havanense species group of the Geminata clade (sensu Weese & Bohs, 2007). It is most similar to S. havanense, but its relationships have not yet been assessed using molecular data.
Solanum troyanum is a spectacular plant with its large, purple flowers to 6 cm in diameter and shiny dark green leaves. Like those of S. havanense, the flowers become larger through anthesis. Solanum troyanum is very similar to S. havanense, but in addition to having larger flowers, is glabrous on all vegetative parts, including the very young growth. Solanum havanense occurs along the coastal fringe on limestone, while S. troyanum is a mountain plant, growing in moist forests on slopes.
Solanum troyanum is assigned a preliminary conservation status of Vulnerable (VU) based on its narrow geographical range (< 20,000 km2) and the length of time since the last specimen was collected (1976) (Yoder, 2006), buts its status as a single island endemic may warrant an assessment of Endangered (EN). Recollection of S. troyanum is a high priority, and given its large, showy flowers, it is a potential candidate for ex situ conservation and propagation as an ornamental.
Three syntypes were cited by Urban in the original description (Urban, 1908): Harris 8530, 8681 and 9000. The gathering Harris 9000 from Mt. Diablo was chosen as the lectotype (BM, see Fig. 7) as it is represents more complete flowering and fruiting material, and is distributed in three herbaria.
Urban, I. 1908. VIII. Nova genera et species III.
Symbolae Antillanae 5: 287-531.
Yoder, N. 2006. Biodiversity and conservation of Solanum in the Caribbean and The Philippines from herbarium collections.
Unpublished M.Sc. thesis, Oxford University Centre for the Environment, School of Geography, Oxford, UK.
Weese, T.L. & L. Bohs 2007. A Three-Gene Phylogeny of the Genus Solanum (Solanaceae)
Syst. Bot. 32(2): 445-463.