12 KEY AND FLORA 
** Ovary 2-4-celled. FAMILY 
+ Cells each 1-seeded. 
Ovary deeply 4-lobed . . . . . . . 88 Mint. . 
Ovary not deeply lobed. 
Stamens 2 or 4 : - . . . . 87. Verbena 
Stamens 8 ows eee . . 53. Polygala 
tt Cells each 2-several-seeded. 
Corolla lobes imbricateinthebud . . . 90. Figwort 
Corolla lobes convolute inthe bud . . . 98. Acanthus . 
(ce) Ovary inferior. 
Flowers in an involucrate head . . . . 100. Composite 
Flowers not in heads. 
Stamens 3. 
Leaves opposite . . . . . . . . 97. Valerian 
Leavesalternate . . . . . . . 98. Gourd . 
Stamens 4-5. 
Leavesalternate . . . . . . . . 99. Campanula 
‘Leaves opposite or whorled . . . . . 95. Madder 
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