NYCTAGINACEÆ. 21 
exserted (Hypisonia), more rarely subexserted, or included or sub- 
included (WVeea), in female flowers sterile, generally included ; anther 
cells subovate, separate. Germen and ovule nearly of Mirabilis ; 
style generally lateral (posterior), included or exserted ; apex laterally 
stigmatiferous, thickened, subclavate, subeapitate, or more or less 
penicillate-fimbriate or ramose. Fruit clothed with the hardened 
cylindrical, obovoidal subclavate ovoidal or conoidal base of perianth, 
slightly glabrous, or with 5 viscous or glandular-serrate or capitate- 
glandular ribs. Seed suberect ; embryo erect; radicle inferior; coty- 
ledons straight or incurved conduplicate at apex, straight at margin, 
or incurved, or involute, generally unequal (interior smaller) ; albu- 
men in the concavity of cotyledons very small or a little mucilaginous, 
sometimes more or less fleshy.—Trees or shrubs glabrous or pilose ; 
bark often spongy ; branches often (with axillary shoots or abortive 
peduncles) aculeate ; leaves alternate or opposite, often entire ; flowers 
cymose ; cymes solitary, terminal, sometimes capituliform, generally 
in simple or ramified panicled racemes; bracts small, 1-3 or more 
rarely 4—6 (A! warm regions of the Globe). See p. 8. 
11. Colignonia Enpi.—Calyx subcampanulate, 2—5-fid, the base 
persisting round the ovary, dilate-ovoid. Stamens 3-6 included. 
Ovary and ovule nearly of Pisonia ; style slender; apex stigmati- 
ferous, capitate, or penicillate-multifid. Fruit clothed with the base 
of the calyx, growing into 3-5-agonal wings, crowned by the per- 
sistent limb of the perianth.—Herbs or small shrubs ; leaves opposite, 
flowers minute in close false umbels, solitary or frequently ramified- 
compound; bracts small, sometimes coloured (South Warm and Western 
America). See p. 11. 
12. Boldoa Cav.—Calyx tubular; apex 4-dentate. Stamens 2-4 
hypogynous, exserted or more rarely (eichenbachia) included. Germen 
and ovule nearly of Pisonia ; style slender, erect ; apex pointed or 
capitate stigmatiferous, exserted or included.—Herbs, undershrubs, 
or small shrubs; leaves alternate; flowers in small cymes; cymes 
arranged in simple or ramified racemes, or sometimes in corymbs ; 
bracts very small (Western Warm America). See p. 11. 
13. Bougainvillea Commurs.—Calyx long, tubular; limb short, 
