XU ANALYTICAL KEY. 



Division n. GAMOPETALjE. 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^;, 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. .... Lobeliace^e, 43 

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

 Nearly or quite free from the corolla : leaves alternate : 



no stipules. Campanulace^;, 44 



Inserted on the corolla : leaves opposite or whorled, 



With stipules, or else in whorls, quite entire. . . RnBiACEa:, 40 



Without stipules, opposite Oapbifoliace^:, 39 



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

 Leaves opposite : stamens distinct. . . . Valerianace.e, 41 

 Leaves alternate : stamens often united. . . . Cdcdrbiiace.e, 33 



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



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



Pistil single and simple : leaves compound. . . Leguminos^e, 25 

 Pistil compound, with one undivided style Ericace.s, 45 



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

 Style 1 : ovary and capsule several to many-seeded. . . Peimulace^;, 46 



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



* No green herbage. 

 Corolla regular : stamens free : seeds very many and 



minute. . . ... Monotropeae, in Ericace^;, 45 



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



Cuscuta, in Convolvulace^;, 54 

 Corolla irregular: stamens didynamous: capsule 1 -celled, 



many-seeded Orobanchace^;, 57 



* * With ordinary green herbage. 

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

 Corolla scarious and veinless : stemless herbs. . . PiiANTAGiNACEa:, 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- 

 cle 8 Asclepiadace^:, 49 



Pollen powdery. 

 Ovaries_2 : fruit a pair of follicles. . . Apocynace*:, 48 



