54 



Key 



VINES 



PLANTS WITHOUT LEAVES . .. Cuscuta— 166 



PLANTS WITH LEAVES. 

 I. Leaves compound. 



A. Leaves palmately compound. 



(1) Stems woody Parthenocissus — 133 



(2) Stems not woody. 



o. Flowers white Cyclanthera — 202 



p. Flowers yellow, leaflets 4 Zornia — 110 



B. Leaves pinnately compound. 

 1. Leaves once-pinnate. 



a. Leaves mainly opposite. 



x. Leaves with odd leaflet at end. 



<1) Flowers white Clematis— 79 



(2) Flowers violet or purple > . .Viorna— 80 



y. Leaves without odd leaflet at end. 



(1) Leaflets 3—4 pairs Kalstroemia— 116 



(2) Leaflets 10—14 pairs Tribulus— 114 



fe. Leaves mainly alternate. 



x. Leaves with tendril at end. 



(1) Leaflets 1 pair Lathyrus — 110 



(2) Leaflets 4—8 pairs Vicia— 110 



y. Leaves with odd leaflet at end. 



m. Leaf let 1 Dolicholus— 108 



n. Leaflets 3. 



a. Stems woody. 



1. Stems prickly Rubus— 90 



2. Stems not prickly Rhus— 127 



b. Stems not woody. 



(1) Flowers yellow Dolicholus— 108-9 



(2) Flowers morocco-red Psoralea — 105 



(3) Flowers purplish or violet. 



o. Pods 1-seeded (Rarely 2- 



seeded) Lespedeza — 108 



p. Pods more than 1-seeded Strophostyles— 109 



o. Leaflets more than 3. 



(1) Leaflets white-margined Cracca— 102 



(2) Leaflets not white-margined. 



o. Flowers yellow Aeschynomene — 111 



p. Flowers pink to scarlet. Indigofera — 101 



