Solanum julocrotonoides
Solanum julocrotonoides occurs in the Sierra de Amambay range of Paraguay and adjacent areas of Estado Mato Grosso do Sul, Brazil, just east of the Chaco Boreal and between the watersheds of the Río Paraguay and Río Paraná, in low mountains, about 300-900 m in elevation.
This species undoubtedly belongs to the Brevantherum clade sensu Bohs (2005), but its position within the clade has not been investigated using molecular data.
Roe, K.E. 1967. A revision of Solanum sect. Brevantherum (Solanaceae) in North and Central America.
Brittonia 19: 353-373.
Roe, K.E. 1971. Terminology of hairs in the genus Solanum.
Taxon 20: 501-508.
Roe, K.E. 1972. A revision of Solanum section Brevantherum (Solanaceae).
Brittonia 24: 239–278.
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.
Solanum julocrotonoides is distinguished from other members of section Brevantherum by its oblanceolate leaves that are boat-shaped and curved, yellowish pubescence, large flower buds, and pale yellow corollas.
This very distinct species shows no outstanding relationship to any particular member of section Brevantherum. Solanum granuloso-leprosum (also of Paraguay and SE Brazil) and S. stipulaceum (of NE Brazil) are perhaps its nearest relatives; they inhabit similar dry habitats. Solanum julocrotonoides can be distinguished from those two similar species by its concolorous leaves, shorter inflorescence axes and yellow flowers.