Monographs Details: Bonnetia martiana var. venadoensis Maguire
Authority: Maguire, Bassett. 1972. The botany of the Guayana Highland--part IX. Mem. New York Bot. Gard. 23: 1-832.
Family:Theaceae
Description:Distribution and Ecology - Distribution. COLOMBIA. Vaupés: shrub to 0.5-3 m high; petals white, pink-flushed, frequent, Cacagual Savanna, Río Atabapo, between San Fernando and Caño Temi, at 135 m alt, 13 Sep 1957, Maguire, Wurdack & Keith 41432 (NY). VENEZUELA. Terr. Amazonas, Sabana El Venado at 140 m alt: bushy shrub to 3 m, petals white, pink toward margins, locally frequent, Maguire & Wurdack 36340 (NY, US); Maguire, Wurdack & Keith 41801 (holotype NY, isotypes NY, US, COL, GH, VEN, F, RB); shrub 1-1.5 m high, fruiting, frequent on savanna edge, at 140 m alt, 14 Apr 1953, Maguire & Wurdack 35637 (unicate NY); shrub 2.5-3.0 m high, leaves coriaceous, Cerro Arauicaua, at 150 m alt, 12 Apr 1970, Steyermark & Bunting 102581 (NY, VEN). BRAZIL. Amazonas: tree 25 ft, 6 in, rosy flowers, swamp next to Campina, Padauiry, São Pedro, Rio Negro, 27 Oct 1947, Fróes 22659 (NY).

Discussion:

Type. Shrub 1.0-2.5 m high, petals white, apically pink-flushed, locally frequent along savanna margin, Sabana El Venado, left bank, Caño Pimichín, 2 km above Pimichín, at 140 m alt, Territorio Amazonas, Venezuela, 10 Oct 1957, Bassett Maguire, John J. Wurdack & William M. Keith 41801 (holotype NY).

Bonnetia martiana, of lowland savannas in the Alto Río Caqueta and Guainía, is to be most closely associated with B. crassa Gleason. It differs chiefly from the high-altitude species which has stout peduncles, 16-20 mm long, and short anthers, ca 1 mm long, in its subsessile or very short (1-3 mm) peduncles, and elongate anthers (2.0-2.5 mm).

The two varieties are distinguished by conspicuous differences in prominence of leaf veins and by considerable disjunct distribution, the var martiana known only from the Araracuara Savanna on the Río Caqueta, and the var venadoensis from the Sabana Venado on the Cano Pimichín, affluent of the Río Guainía, the Rio Pacimoni, both areas in Venezuela, and the Rio Negro, vic São Pedro, Brazil.

Distribution:Venezuela South America| Brazil South America|