GAMOPETALAE. 123 
(4) Stamens inserted on the tube of the 
corolla. 49, 
49 (a) Leaves (all) opposite or verticillate. 
Flowers regular, or nearly so. 50. 
(4) Leaves alternate (but sometimes in pairs, 
or the lowermost opposite) or radical or 
wanting, rarely opposite or verticillate, 
but then flowers distinctly irregular 
with a 2-lipped corolla. 51. 
50 (a) Ovary 1-celled, or incompletely 2-celled, 
more rarely completely 2-celled ; in the 
latter case herbs and _ corolla-lobes 
contorted in aestivation. Herbs, rarely 
shrubs,and then stigma 2-partite. Leaves 
exstipulate, but sometimes sheathing at 
the base, entire. Corolla-lobes contorted, 
very rarely (otherwise) imbricate in the 
bud. Gentianene. 
(0) Ovary completely 2-celled, rarely incom- 
pletely, but then trees or shrubs and 
stigma entire. Herbs with valvate or 
imbricate (but not contorted) corolla- 
lobes, or more frequently shrubs or trees. 
Leaves stipulate or sheathing at the 
base, entire or dentate. Stigma entire, 
very rarely bipartite. Loganvaceae. 
51 (a) Style 2-fid or 2-partite, with terminal 
