XXI. BIXINE^L 245 



TREES or SHRUBS. LEAVES alternate, simple, toothed, rarely entire, sometimes 

 palmilobed or compound (Cochlospermum, Amoreuxia), sometimes p ellucid- dotted ; 

 stipules minute, caducous or 0. FLOWERS $ or unisexual, regular, axillary or 

 terminal, solitary or more often fascicled, or corymbose, racemose or panicled. 

 SEPALS 4-5, or 2-6, free or connate, aestivation imbricate, rarely sub-valvate (Azara, 

 &c.), or united into 2 more or less regular valves (Pangium, &c.). PETALS hypogy- 

 nous, as many as sepals, or oo, aestivation imbricate and twisted, deciduous, or 0. 

 STAMENS hypogynous, or obscurely perigynous, indefinite, or rarely definite (Azara, 

 Erythrospermum, &c.) ; anthers opening by slits, or rarely by an apical pore (Bixa, 

 Cochlospermum, &c.). TORUS often glandular, thick, or dilated (Xylosma), sometimes 

 adnate to the calyx base, rarely annular and adnate to the ovary (Peridiscus) . OVARY 

 free, usually 1 -celled, with 2- oo parietal placentas, sometimes several-celled (Fla- 

 courtia, Amoreuxia, &c.) ; styles as many as placentas, united, or more or less free ; 

 ovules 2- oo on each placenta, anatropous or half-anatropous. FRUIT fleshy or dry, 

 indehisccnt, or opening by seed-bearing valves. SEEDS usually ovoid or pisiform, rarely 

 reniform, or cochlear and velvety (Cochlospermum), smooth, or pulpy on the outside 

 (Bixa, Dendrostylis) ; albumen fleshy, more or less copious. EMBRYO axile, straight 

 or curved ; radicle near the hiluni ; cotyledons large, usually cordate. 



TRIBE I. 



Flowers $ , or rarely polygamous. Petals large, without a scale, twisted in 

 bud. Anthers linear or oblong, opening by 2 terminal pores, or short valves. 

 Capsule dehiscent; endocarp membranous, separating from the valves. 



PRINCIPAL GENERA. 

 Cochlospermum. * Bixa. 



TRIBE II. 02HCOBEM 



Flowers dioecious or polygamous. Sepals and petals imbricate, the latter most 

 numerous and without a scale. Anthers linear, opening by slits. 



PRINCIPAL GENERA. 

 Oncoba. Dendrostylis., 



TRIBE III. FLACOURTltiM 



Flowers $ or dioecious. Petals 0, or equal to the sepals, imbricate, without a 

 scale. Disk surrounding the stamens or the ovary. Anthers short, linear, opening 

 by slits. 



PKlNClPAL GENERA. 



Lsetia. *Azara. Erythrospernmm, Xylosma. 



Ludia. Scolopia. Flacourtia. Aberia. 



