120 KEY TO PLANTS. 
41 (a) Stamens 4. 42, 
(2) Stamens 5. 43. 
42 (a) Flowers regular. Calyx 4-partite. Stamens 
equal or nearly equal in length. Anthers 
2-celled. Ovules erect or horizontal. 
Fruit usually dehiscing transversely. 
Radicle of the embryo inferior. Herbs 
or undershrubs. Plantagineae. 
(2) Flowers more or less irregular. Calyx 
spathaceous (split on one side), or 
2-partite, or 5-lobed. Stamens didynam- 
ous. Anthers I1-celled. Ovules pen- 
dulous. Fruit indehiscent or separating 
into 2 nuts. Radicle of the embryo 
superior. Ovules 1-2. Europe, Asia, 
Africa. Selagineae. 
43 (a) Style stigmatose below the smooth, 
2-lobed apex. Stigma 1. Shrubs or 
trees. Corolla contorted in aestivation. 
Leaves entire. Ovary 2-lobed and 
2-celled, or 2 distinct ovaries. Ovules 4 
A pocynaceae. 
(2) Style stigmatose at the apex, or at the 
apices of its branches, or between the 
apical lobes. Stigmas usually 2, rarely 
and only in herbaceous plants1. Corolla 
imbricate in aestivation, rarely contorted, 
