NYCTAGINACE2E. 21 



exserted {Eupisonia), more rarely subexserted, or included or sub- 

 included {Neea), in female flowers sterile, generally included ; anther 

 cells subovate, separate. Grermen and ovule nearly of Mirabilis ,- 

 style generally lateral (posterior), included or exserted ; apex laterally 

 stigmatiferous, thickened, subclavate, subcapitate, 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 {All warm regions of the Globe). See p. 8. 



11. Colignonia Endl. — 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 {Reichenbachia) 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. ]1. 



13. Bougainvillea Commkrs.-— Calyx long, tubular; limb short, 



