Cybistax
-
Authority
Gentry, Alwyn H. 1992. Bignoniaceae--part II (Tribe Tecomeae). Fl. Neotrop. Monogr. 25: 1-370. (Published by NYBG Press)
-
Family
Bignoniaceae
-
Scientific Name
-
Type
Type. C. antisyphilitica (Mart.) Mart. Yangua Spruce, J. Proc. Linn. Soc. Bot. 3: 197. 1859. Type. Y. tinctoria Spruce (=C. antisyphilitica (Mart.) Mart.).
-
Description
Genus Description - Shrubs to large trees, the bark rather thick and vertically fissured, lacking pseudostipules or interpetiolar glandular fields. Leaves palmately 5-7-foliolate. Inflorescence a short open, few-branched, terminal panicle with pedicels longer than the peduncle. Flowers light green, the calyx membranaceous, campanulate-infundibuliform, 5-dentate with usually long acuminate teeth extended as lateral ribs, minutely lepidote and sometimes also inconspicuously puberulous; corolla tubular-campanulate above the narrowed tube base, the tube minutely and inconspicuously lepidote and puberulous outside, almost completely glabrous inside, sometimes sparsely and inconspicuously short-puberulous in floor of tube; the lobes small and evenly rounded; stamens di-dynamous, the thecae divaricate, glabrous as the filaments; style glabrous, the ovary ovoid-oblong, minutely lepidote-glandular, the ovules multiseriate; disk annular pulvinate. Fruit a capsule, the calyx caducous, oblong, woody, longitudinally very strongly 12-ribbed, minutely lepidote, the thin septum elliptic; seeds with thin heart-shaped body completely surrounded by a broad hyaline-membranaceous wing.
-
Distribution
A single species, ranging through much of sub-Amazonian tropical South America; disjunct in southernmost Surinam.
Suriname South America| Brazil South America| Bolivia South America| Paraguay South America|