ANALYTICAL KEY 15 



Placentae 2, parietal, Corydalis in 47. PAPAVEBACEAE, 205 



Ovary 3-several-cellecL 



Stamens free from the corolla. 

 Style 1 ; leaves simple. 



Ovary superior; fruit a capsule or berry 88. ERICACEAE, 369 



Ovary inferior; fruit a berry 89. VACCINIACEAE, 372 



Styles 5; leaves 3-foliolate 59. OXALIDACEAE, 304 



Stamens attached to the base or tube of the corolla. 



Saprophytic herbs, without green foliage 87. MONOTROPACEAE, 368 



Not saprophytic ; foliage green. 



Filaments united into a tube 72. MALVACEAE, 316 



Filaments free from each other. 



Low shrubs, with simple leaves 89. VACCINIACEAE, 372 



Low herbs, with radical leaves ternate 111. ADOXACEAE, 472 



Stamens not more numerous than the corolla-lobes. 



Stamens of the same number as the corolla-lobes and opposite them 



90. PRIMULACEAE, 372 



Stamens alternate with the corolla-lobes, or fewer. 

 Ovary free from the calyx-tube (superior). 

 Corolla regular. 



Stamens as many as the corolla-lobes. 

 Ovaries 2, or, if 1, 2-horned. 



Stamens distinct 95. ASCLEPIADACEAE, 386 



Stamens united 94. APOCYNACEAE, 385 



Ovary 1. 



Ovary deeply 4-lobed. 



Leaves alternate 100. BORAGINACEAE, 410 



Leaves opposite 102. LABIATAE, 426 



Ovary not deeply lobed. 



Ovary 1-celled; seeds several-many. 



Leaves entire, opposite 92. GENTIANACEAE, 379 



Leaves toothed, lobed, or compound. 



Whole upper surface of the corolla white-bearded; 



leaflets 3, entire 93. MENYANTHACEAE, 384 



Corolla not conspicuously bearded; leaves, if com- 

 pound, with toothed leaflets 99. HYDROPHYLLACEAE, 405 

 Ovary 2-10-celled. 



Leafless, twining parasite 96. CUSCUTACEAE, 389 



Leaves alternate, or, if opposite, without stipules. 



Stamens free from the corolla, or nearly so 88. ERICACEAE, 369 

 Stamens on the tube of the corolla. 

 Stamens 4. 



Stem with opposite leaves; corolla petaloid 



101. VERBENACEAE, 424 



Stem wanting; corolla scarious 108. PLANTAGINACEAE, 464 

 Stamens 5. 



Fruit of 2 or 4 seed-like nutlets 100. BORAGINACEAE, 410 

 Fruit a few-many-seeded capsule, or berry. 

 Styles 2. 



Capsule few (mostly 4)-seeded 



97. CONVOLVULACEAE, 392 

 Capsule many-seeded 99. HYDROPHYLLACEAE, 405 



