Key 55 



Page 



z. Leaves without odd leaflet at end. 



(1) Leaflets 3 — 4 pairs Kalstroemia — 116 



(2) Leaflets 10—14 pairs Tribulus— 114 



2. Leaves twice-pinnate. 



(1) Stems prickly, flowers pink Morongia — 95 



(2) Stems not prickly. 



o. Stems woody Ampelopsis — 133 



p. Stems not woody .Cardiospermum— 129 



II. Leaves simple. 



A. Leaves parallel veined. 



(1) Vines armed with spines Smilax — 66 



B. Leaves with netted veins. 



(I) Leaves opposite or whorled. 



x. Leaves with 1 main vein at base. 



(1) Leaves in whorls of 4 or 7 Galium— 199 



(2) Leaves not whorled. 



o. Flowers tubular Acleisanthes — 75 



p. Flowers in heads Lippia — 179 



q. Flowers neither tubular nor in 



heads Isnardia — 146 



y. Leaves with more than 1 vein at base, 

 m. Sap milky. 



(1) Flowers green . Vincetoxicum— 164 



(2) Flowers white Philabertella— 164 



n. Sap not milky. 



r. Leaves small, broader than long... Bowlesia — 153 



s. Leaves not broader than long. 



(1) Flowers tubular Acleisanthes — 75 



(2) Flowers not tubular. 



o. Flowers in compact heads, 



stems rooting at the nodes... Lippia 179 



p. Flowers composite, stems not 



rooting at nodes Willugbaeya— 215 



(II) Leaves alternate. 



x. Leaves with 1 main vein at base. 



a. Sap milky Asclepiodora— 163 



b. Sap not milky. 



(1) Plants with stinging hairs Tragia — 122 



(2) Plants without stinging hairs. 



(x) Stems square Micromeria— 189 



(y) Stems not square. 



