124 KEY TO PLANTS. 
stigmas. Herbs or undershrubs. Flowers 
regular. CorolJla-lobes imbricate or con- 
torted in bud. Stamens 5, very rarely 
6-10. Hydrophyllaceae. 
(4) Style undivided, with an entire or 2- 
partite stigma. 52. 
52 (a) Ovary 1-celled. ' 53. 
(6) Ovary 2-celled. 54. 
53 (a) Corolla-lobes valvate or contorted in 
aestivation, in the latter case leaves re- 
duced to scales. Stigma 2-partite, more 
rarely entire, and then leaves reduced to 
scales. Flowers regular or nearly so. 
Leaves entire, radical or alternate, or re- 
duced to scales. Herbs. Gentianeae. 
(2) Corolla-lobes imbricate in aestivation. 
Leaves perfectly developed. Stigma 
entire. Flowers more or less irregular. 
Leaves entire or dentate. Herbs. 
Gesneracede. 
54 (a) Corolla scarious, 4-lobed, regular, imbri- 
cate in aestivation. Herbs or under- 
shrubs. Fruit dehiscing transversely 
below the middle. Dise 0. Stigma 
entire. Plantagineae. 
(4) Corolla not scarious, 5-8-lobed, more rarely 
4-lobed, but then irregular (2-lipped) or 
