xii ANALYTICAL KEY. 



DIVISION II. GAMOPETALJ3. Petals more or less united into one 



piece. 



A, Ovary inferior, or mostly so. 



Stamens more numerous than the lobes of the corolla, 8 or 10, dis- 

 tinct ERICACE^J, 45 



Stamens as many as the lobes of the corolla, 5 (or 4), syngenesious. 



Flowers in an involucrate head. COMPOSITE, 42 



Flowers separate, racemose or spicate LOBEEIACE^S, 43 



Stamens as many as the corolla lobes (at least 4), distinct, 

 Nearly or quite free from the corolla : leaves alternate : 



no stipules. CAMPANULACE^E, 44 



Inserted on the corolla : leaves opposite or whorled, 



With stipules, or else in whorls, quite entire. . . RUBIACE^E, 40 



Without stipules, opposite CAPRIFOLIACE.E, 39 



Stamens only 3, fewer than the lobes of the corolla. 



Leaves opposite : stamens distinct. . . . VALERIANACE.E, 41 

 Leaves alternate : stamens often united. . . . CUCURBITACE^E, 33 



B. Ovary superior (free), or mostly so. 

 1. Stamens more numerous than the lobes of tlie corolla. 



Pistil single and simple : leaves compound. . . . LEGUMINOSJE, 25 

 Pistil compound, with one undivided style ERICACEAE, 45 



2. Stamens as many as the lobes of the corolla and opposite them. 

 Style 1 : ovary and capsule several to many-seeded. . . PRIMULACE.E, 46 



3. Stamens as many as the lobes of the corolla, and alternate with them, or fewer. 



* No green herbage. 

 Corolla regular : stamens free : seeds very many and 



minute. Monotropese, in ERICACE^, 45 



Corolla regular : stamens on the tube : fruit 2-celled. 



Cuscuta, in CONVOLVULACE.E, 54 

 Corolla irregular : stamens didynamous : capsule 1 -celled, 



many-seeded OROBANCHACE^, 57 



* # With ordinary green herbage. 



t- Corolla regular or nearly so : stamens not didynamous. 



Corolla scarious and veinless : stemless herbs. . . PLANTAGINACEJE, 61 

 Corolla more or less veiny. 



Stamens 2 or 3 : parts of the corolla 4 or 5. . . . OLEACE^E, 47 

 Stamens 5 (or 4), as many as the corolla-lobes. 

 Pollen in solid waxy masses : fruit a pair of folli- 

 cles ASCLEPIADACE.E, 49 



Pollen powdery. 

 Ovaries 2 : fruit a pair of follicles. . . . APOCYNACE^, 48 





