Solanum yanamonense
In the Amazon basin of eastern Peru, only known from the type locality on the Río Amazonas near the mouth of the Río Napo, at ca. 120 m.
Solanum yanamonense is a member of the Solanum confine species group (Knapp, 2002) ofhte Geminata clade (Bohs, 2005).
Vásquez Martínez, R. 1997. Flórula de las reservas biológicas de Iquitos, Perú.
Monographs in Systematic Botany from the Missouri Botanical Garden 63. St. Louis, MO.
Knapp, S. 2002. Solanum section Geminata (G. Don) Walpers (Solanaceae).
Flora Neotropica 84: 1-405.
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 yanamonense is similar and probably closely related to S. confine, also of Amazonian Peru, but the latter species is found in the foothills of the Andes and not in the true Amazonian lowlands. Solanum yanamonense differs from S. confine in its smaller stature, distinctive leaf venation with the main lateral veins arching and converging again very near the midrib, and in its minute, greenish flowers. The leaf apex of S. yanamonense differs from that of all closely related species in being long-acuminate with a truncate tip. Solanum yanamonense is a small understory shrub of terra firme primary forest and is grows abundantly in clumps where it occurs. Its range may be much more extensive, but because of its small, inconspicuous green flowers and fruit, it is not likely to be collected often; however it should be looked for in Amazonian Brazil.
Solanum yanamonense is not treated by Vásquez (1997), and he apparently does not consider it as a synonym of any other species occurring in the Iquitos area.