66 KEY TO PLANTS. 
usually persistent. Tendrils most fre- 
quently present. Ovary usually stipitate. 
Passifloreae. 
(0) Receptacle without a corona. Flowers 
hermaphrodite. Petals contorted in bud, 
deciduous. Calyx-lobesimbricate. Pla- 
centas 3, opposite to the styles. Asia, 
Africa, America. Turneraceae. 
40 (a2) Style or sessile stigma 1; style undivided. 
(6) 41, 
(4) Styles or sessile stigmas 2 or more; styles 
separate or united below. 51. 
41 (2) Ovule 1. ‘Trees. Leaves opposite, en- 
tire, exstipulate. Flowers polygamous. 
Petals hypogynous. Ovule basal. Seed 
exalbuminous. Tropics. Guttiferae. 
(6) Ovules 2 or more. 42. 
42 (a2) Ovules basal, apical, central, or sutural. 
43. 
(2) Ovules on several parietal placentas, 47. 
43 (a) Petals and stamens hypogynous. Sepals 
imbricate in bud. 44, 
(4) Petals and stamens perigynous, rarely 
nearly hypogynous, but then sepals val- 
vate in bud. 45. 
44 (a) Herbs. Leaves lobed or dissected. Sepals 
deciduous, Ovules several or many, at- 
