KEY TO FAMILIES 



(r) Ovary and frail fen seeded 



(s) i >\ .iry and fruit ii 



g. < ivaries 2, united al the tip only 

 (n) Flowers ii regular ; itan 

 r. Shrubs 



s. 1 1 



3 eds borne dire< tly on the 



borne on i up <t hook like 

 (y) i (vary 4 i elled or 4 lobed 

 in. < Ivary 4 celled 



(m) Leaves rising directly from ■ 

 (n) Leaves borne on above-ground 

 r. Leaves opposite 

 s. Leaves alternate, al leas) above 



(r) Leaves alternate throughont; fruit of 4 nut! 

 (s) Leaves opposite below; fruil ■ hooked pod 

 n. » (vary 4 lobed or 4 di\ ided 



(m) Leaves opposite; flowers mostly irregular 

 (n) Leaves alternate; flowers mostly regular 

 i rv 3 . elled 

 (x) Twiners 



iy) Erect herbs, or tendril climbers 

 (b) Ovary inferior, i.e., below the Other parts 

 x. Woody plants 

 y. Herbs 



(x) Stamens 1-3 

 m. Erect herbs 



n. Climbing or trailing plants, usually with tendrils 

 (y) Stamens 4 S 

 in. Sap milky: stamens often unite. 1 

 n. Sap not milky; stamens separate 

 (z) Stamens many; flowers monoecious 01 

 2. Flowers in b 



a. Ovary superior; flowers pea-like 

 1). Ovary inferior; flowers oot pea-like 

 v l; Stamens united by their anthers 

 (2) Stamens separate 

 II. Petals absent 



1. Sepals present, often pel J like, rarely very minute 



a. Calyx funnel-form, bright-colored; invi 



b. Calyx not funnel form 



( 1) Pistils several many 



(2) Pistil 1, at least the ovary 



(a) Si un< as as many as the sepals 

 x. Flowers in dense flesh] spikes 

 > . Flowers not in fleshy 

 (x) Ovary superior 

 in. 1 lower > lusters pa] 

 n. Flower i lusters » ithi 

 (m) Sepal 

 i a | Sepals * or more 



r. Stipules papery and sheathing tl 



corolla likr 

 s. Stipules not ; 

 (r) Stigma 1 

 (s) - 



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