Monographs Details: Irlbachia subcordata (Benth.) Progel
Authority: Maguire, Bassett. 1978. The botany of the Guayana Highland--part XI. Mem. New York Bot. Gard. 32: 1-391.
Description:Distribution and Ecology - Distribution. Bentham wrote (1c): " Mr. Spruce found but two specimens, one in flower, the other in fruit, near Panure on the Rio Uaupes, with the L. recurvus.'' Progel (1c) of Irlbachia subcordata cited: "Prope Panure secundum Rio Uaupes et prope S. Carlos do Alto Amazonas: Spruce n. 2524 et 3055.'' He further cites under the next, I. recurva: "Prope Panure of Rio Uaupes: R. Spruce n. 2524.'' The New York sheet of Spruce 2524 is clearly I. nemorosa (I. recurva) (I. recurvus). It seems to m e not improbable that Irlbachia (Pagaea recurva and I. (P.) subcordata are the same thing.

Discussion:3. Irlbachia subcordata (Bentham) Progel, Fl. Bras. 6(1): 229. 1865. Lisianthus subcordatus Bentham, Hook. Jour. Bot. Kew Misc. 6: 200. 1854. Pagaea subcordata (Bentham) Bentham & Hooker, Genera 2(2): 814. 1876. Type. Near Panure, on the Rio Uaupes, Spruce sn (presumably at K).