Proposed IUCN category: DD. Insufficient specimens could be georeferenced with certainty. (Hughes, M. An annotated checklist of Southeast Asian Begonia. 2008)
Distribution
Asia-Tropical: Sulawesi (Sulawesiendemic)
Endemic to Indonesia, Sulawesi, North Sulawesi.
Notes
This species had been assigned to § Sphenanthera in error, as it has dehiscent fruit with distinct wings. I have re-assigned it here to § Petermannia, as it has (i) bifid placentae, (ii) male flowers with two tepals and (iii) two female flowers at the base of a larger cymose male inflorescence. The specimen collected by de Vriese and Teijsmann in L (annotated by Miquel) is a possible syntype, although the protologue refers only to the "original exemplar von Miquel in Herb. Hort. Bog.", without collector information. (Hughes, M. An annotated checklist of Southeast Asian Begonia. 2008)
Specimens
SULAWESI: 1859 – 1860, W.H. de Vriese, J.E. Teijsmann s.n. (L); Manado, 1859 – 1860, J.E. Teijsmann s.n. (B); Pangkadjene, 12 i 1937, P.J. Eyma 301 (BO) [as Begonia aff. heteroclinis]. (Hughes, M. An annotated checklist of Southeast Asian Begonia. 2008)