GAMOPETALAE. 119 
hiscing by 2 longitudinal slits. Ovules 
2-4. Embryo folded. Convolvulaceae. 
(2) Ovules pendulous or descending. Stigma 
1. Corolla valvate in aestivation. 38. 
38 (a) Leaves bipinnate, stipulate. Flowers in 
spikes or heads. Calyx small, valvate 
or open in bud. Anthers dehiscing by 
2 longitudinal slits. Ovary 1-celled, with 
2-4 ovules. Leguminosae. 
(2) Leaves simple, entire dentate or lobed, 
exstipulate. 39. 
39 (a) Anthers dehiscing by 1 longitudinal slit. 
Ovary 1-2-celled, with 1 ovule in each 
cell. Sepals free or united at the base, 
imbricate in bud. Shrubs or trees. 
Embryo straight. Australasia and South 
Asia. Epacrideue. 
(0) Anthers dehiscing by 2 longitudinal slits. 
Ovary l-celled, with 2 ovules. Sepals 
usually united to the middle or beyond, 
imbricate or open in bud. Shrubs or 
trees. Embryo straight. Olacineae. 
40 (a) Plants destitute of green colour and of 
leaves. Parasitical herbs. Stem twin- 
ing. Ovules 4. Convolvulaceae. 
(4) Plants of a green colour, provided with 
leaves. 41, 
