Distinctive characters of extra-Amazonian species of the Androceras/Crinitum clade. A Stem indumentum of S. crinitum; note the straight bristly stellate trichomes (Y.F. Gouvêa et al. 196, BHCB) B Stem indumentum of S. falciforme; note the falcate stellate trichomes (L.F. Souza 481, BHCB) C Stem indumentum of S. lycocarpum (Y.F. Gouvêa 268, BHCB) D Adaxial leaf surface indumentum of S. lycocarpum (Y.F. Gouvêa 268, BHCB) E Adaxial leaf surface indumentum of S. falciforme (L.F. Souza 481, BHCB) F Adaxial leaf surface indumentum of S. quaesitum (U.M. Resende & V.F. Kinupp 1817, BHCB) G Adaxial leaf surface indumentum of S. crinitum (Y.F. Gouvêa et al. 196, BHCB) H Adaxial leaf surface indumentum of S. gomphodes (L.L. Giacomin et al. 1274, BHCB) I Sessile sagittate leaf bases of S. gomphodes (L.L. Giacomin et al. 1274, BHCB) J Apiculate calyx lobe apices in S. quaesitum; note the extended midribs (U.M. Resende & V.F. Kinupp 1817, BHCB) K Abaxial anther surface of S. quaesitum; note the papillose epidermis sparsely covered by simple glandular trichomes (upper left side: detail of the distinctly swollen epidermis along the connective region; U.M. Resende & V.F. Kinupp 1817, BHCB). Photographs by Y.F. Gouvêa.