308 NATURAL HISTORY OF PLANTS. 
GENERA. 
I. BIXEA. 
1. Bixa L.—Flowers hermaphrodite regular; receptacle shortly 
convex. Sepals 5, imbricated, and petals same in number, alternate, 
contorto-imbricated, deciduous. Stamens © ; filaments inserted under 
gynæceum, free or polyadelphous at base ; anthers extrorse, 2-locular, 
induplicate at middle, at the same place dehiscing by short clefts 
(falsely terminal). Germen free, 1-locular; style elongated, in bud 
recurved, tubular, apex stigmatiferous very obtuse 2-crenate ; pla- 
centas parietal 2, but little prominent; ovules in each æ, 2— o-seriate 
ascending, anatropous ; micropyle extorse lateral and inferior. Fruit 
capsular, densely echinate-setose or more rarely glabrous, laterally 
2-valved; valves thick seminiferous inwardly at middle; endocarp 
separating. Seeds œ, obovoid; apex of funicle dilated in small 
2-lobed aril; outer coat subfleshy suberose-granulate ; chalaza orbi- 
cular, finally depressed; albumen fleshy ; cotyledons of axile embryo 
foliaceous wide, often incurved.—Small trees (abounding in red or 
yellow juice); leaves alternate petiolate digitinerved; stipules 2, 
lateral, caducous ; flowers in terminal racemose cymes ; pedicels under 
calyx often 5-glandular (Zropical America). See p. 273. 
2. Oncoba Forsx.’—F lowers polygamous, moneecious or diæcious. 
Sepals 3-5, and petals same in number, of which 4-10 are larger, 
esquamate ; all much imbricated in præfloration. Stamens o, in- 
serted on more or less thickened receptacle ; filaments free ; anthers 
linear, more rarely oblong or abbreviate, apex muticous or apiculate 
with more or less produced connective ; cells extrorse longitudinally 
rimose. Germen free, 1-locular ; placentas parietal 2-10, ©-ovulate ; 

) Fl. Æg.-arab., 103 (1775).—J., Gen., 292 — Beskr., 231 (nec DC., nec Purr.).—Heptaca 
Porr., Dict., vi. 210 ; Iil., t.471.—Spacu, Suit. Lour., Fl. Coch., ed. ulyssip. (1790), 657.— 
à Buffon, vi. 115.—Env1., Gen., n.5067.—PL,  Ventenatia Pat, BEAUV., Fl. Ow. et Ben., i. 
in Hook, Lond. Journ., v. 295.—Paver, Fam. 29, t. 17 (nec SM.).— CamBess., in Mém. Mus., 
Nat., 111.—BeEntu., in Journ. Linn. Soc., vy. xvi. 409.—ENpDL., Gen, n. 5402.—Xylotheca 
Suppl., 80.—B. H., Gen., 125, 971, n.4,.—Orrv., Hocust., in Flora (1843), 69.—Chlanis K1., 
in Journ, Linn. Soc., ix. 172.—H. BN., in Adan- in Pet. Mossamb., Bot., 144. 
sonia, x. 249,—Zundia Scuum, & THôNN. 
