102 KEY TO PLANTS. 
179 (a) Style 1, simple or cleft at the apex only, 
ce or sessile stigma 1. 180. 
(0) Styles 2 or more, free or connected at 
the base only, or sessile stigmas 2 or 
more. 188. 
180 (az) Petals valvate in aestivation. 181. 
(4) Petals imbricate (or contorted) in aestiva- 
tion. 184. 
181 (2) Stamens 8-10, twice as many as petals. 
Segments of the calyx valvate in aestiva- 
tion. Shrubs or trees. Flowers usually 
polygamous. Ovary l-celled. Ovules 
2-6, suspended from the top of the cell. 
Seeds exalbuminous. Tropics and South 
Africa. Combretaceae. 
(2) Stamens 2-6, as many as petals, or fewer. 
Segments of the calyx imbricate or open 
in aestivation. 182. 
182 (a) Flowers unisexual. Seeds exalbuminous. 
Stem climbing or prostrate, usually 
herbaceous. Anthers extrorse. 
Cucurbitaceae. 
(0) Flowers hermaphrodite. Seeds albumin- 
ous.* Shrubs or trees. 183. 
* So also some herbaceous Campanulaceae, the petals of 
which are only slightly coherent, and frequently separate 
afterwards to the base, 
