LEGUMINOSZ- MIMOSEZ. 65 
consecutively, much exserted; anthers 2-celled introrse 2-rimose, 
crowned by a gland; pollen-masses composed of grains collected 
in 2 rows in each cell. Gynaceum central free, inserted in 
bottom of receptacular tube; ovary supported on a long stalk or 
more rarely sessile ; style filiform exserted ; apex minutely capitate 
stigmatiferous; ovules «, 2-seriate descending. Legume straight 
or bowed, more or less elongated compressed coriaceous or sub- 
carnose, 2-valved. Seeds transverse thick compressed; embryo 
exalbuminous ; cotyledons thick fleshy ; radicle superior included.— 
Trees, unarmed ; leaves alternate 2-pinnate ; leaflets numerous small ; 
flowers very numerous in pyriform or depressed-globose heads, singly 
situate in axils of closely imbricated bracts; peduncles long, either 
axillary solitary pendulous or in racemes at extremities of branches 
(Tropical Asia Africa and America). See p. 34. 
19. Pentaclethra Brentu.—Flowers 5-merous, hermaphrodite or 
dicecious; receptacle shortly campanulate or tubular, lined by a 
glandular 10-crenate or 10-lobed disk. Calyx deeply 5-toothed, 
much imbricated. Petals both connate and adnate to stamens toa 
variable height, valvate. Stamens 10-20, perigynous; 5 alterni- 
petalous fertile; anthers introrse 2-celled 2-rimose bearing a deci- 
duous gland; 5 oppositipetalous (or 10-15, 2, 3 opposite each petal) 
sterile, subulate or very elongated linear, much exserted, coloured ; 
all filaments monadelphous to a variable height. Ovary scarcely 
stipitate co-ovulate; style slender; apex slightly dilated concave 
stigmatiferous. Legume eiongated, narrow at base, more or less 
oblique, compressed coriaceous-ligneous, often very thick; valves 
becoming revolute by elasticity on dehiscence. Seeds broad com- 
pressed unequal ; embryo exalbuminous thick oily; radicle included. 
—Trees, unarmed ; leaves 2-pinnate ; pinne and leaflets o, unequal ; 
stipules small caducous ; stipellz setaceous; glands 0; flowers small 
crowded on elongated, simple or more often branched, spikes 
(Lropical America and Africa). See p. 36. 
IV. ACACIEA. 
20. Acacia T'.—Flowers 4-, 5-, more rarely 3-, 6-merous, her- 
maphrodite or polygamous; receptacle more or less, usually slightly, 
concave, glandular within, rarely subplane or slightly convex at 
VOL. I. F 
