ANALYTICAL KEY TO FAMILIES OF ANGIOSFERMS.XX* 



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oo Vines Sapindaceae 609 



000 Not vines. 



p Petals and sepals 2-3 . . Limnanth aceae (in Geraniaceae) 599 



pp Petals and sepals 5 Zygophyllaceae 580 



cc Woody Plants. 

 d Stamens 15 or more. 

 e Stamens monadelphous, at least at base. 



/ Calyx valvate in the bud Malvaceae 617 



ff Calyx imbricated in the bud; stamens united only at base. 



Theaceae (Ternstroemiaceae) 623 

 ee Stamens distinct. 

 f Pistils several. 



g Stamens perigynous Rosaceae 490 



gg Stamens hypogynous. 



h Receptacle hollow; leaves opposite Calycanthaceae 435 



hh Receptacle not hollow; leaves alternate (except in Clematis). 

 i Fruit aggregate; trees; sepals and petals in several series of 3's. 



Magnoliaceae 409 

 ii Fruit separate. 



j Sepals and petals 5 ; shrubs Rantjnculaceae 41 1 



jj Sepals 3, petals 6; shrubs and trees Anonaceae 410 



ff Pistil 1. 



g Stamens perigynous Drup aceae (in Rosaceae) 523 



gg Stamens hypogynous. 



h Leaves compound Mimos aceae (in Legumlnosae) 527 



hh Leaves simple. 



i Trees Tiliaceae 616 



ii Shrubs. 



/ Leaves opposite; dehiscence of capsule mostly septicidal. 



Hypericaceae 624 



jj Leaves alternate above; dehiscence loculicidal Cist aceae 630 



dd Stamens fewer than 15. 

 e Stamens perigynous. 



f Calyx-tube almost none; flowers small, greenish Rhamnaceae 611 



ff Calyx-tube crowned with a double or triple fringe. . . Passifloraceae 641 



fff Calyx-tube cylindric, naked Lythraceae 648 



ee Stamens hypogynous. 

 / Flowers very irregular. 

 g Ovary 1 -celled. 

 h Upper petal inclosed by lower in bud. 



Caesalpin aceae (in Leguminosae) 528 

 hh Lower petals inclosed by upper . .Papilionaceae (in Leguminosae) 532 



gg Ovary 3-celled Hippocast an aceae (in Sapindaceae) 608 



ff Flowers regular or nearly so. 

 g Vines. 



h Pistils 2-many Menispermaceae 434 



hh Pistil 1. 



* Leaves crenulate, pointed, lanceolate Celastraceae 605 



ii Leaves sharply dentate, lobed, compound or broad Vitaceae 613 



gg Not vines. 

 h Pistils several. 



* Flowers in pedunculate heads Platanaceae 490 



ii Flowers cymose or paniculate Rut aceae 581 



hh Pistil one. 

 i Style 1 (often several stigmas or branches) or none. 

 j Leaves very small, 4-7 mm. long; evergreen low shrubs. 



Empetraceae 598 

 jj Leaves larger. 



k Anthers opening by apical valves; leaves or twigs usually some- 

 what spiny Berberidaceae 432 



