GAMOPETALOUS EXOGENOUS PLANTS. XCVU 



Ovary 3-celled. Corolla convolute. POLEMONIACEAE. p. 218. 

 Ovary 1-cdled. Corolla plicate or valvate. SOLANACEAE. p. 224. 



f f Ovaries mostly 2 and distinct at least in fruit. 



Anthers introrse; pollen granular. APOCYNACEAE. p. 232. 



Anthers extrorse; pollen in waxy masses. ASCLEPIADACEAE. p. 233. 



GROUP 11. Ovary free, 2-celled, few-ovuled; cells of the fruit 

 1 -seeded. Corolla regular often wanting ; stamens fewer than its 

 lobes (usually 2). 



Seeds suspended. Corolla (when present) valvate. OLEACEAE. p. 237. 



DIVISION III. APETALOUS EXOGENOUS PLANTS. 



COROLLA none : the floral envelopes consisting of a single series 

 (calyx), or sometimes entirely wanting.* 



GROUP 1. Flowers perfect, with a conspicuous or colored mostly 

 adnate calyx. Ovary several-celled and many-ovuled. Capsule 

 fleshy or berry-like. ARISTOLOCHIACEAE. p. 240. 



GROUP 2. Floivers perfect, or rarely polygamous, with a regular 

 and often colored calyx. Ovary free ; ovules solitary in each ovary 

 or cell. Embryo curved or coiled around mealy albumen, rarely in 

 the axis, or exalbuminous. 



Ovary several-celled, consisting of a verticil of several I-ovuled carpels. PHYTOLAC- 

 CACEAE. p. 241. 



Ovary 1-cetted, with a single ovule. 



Stipules none. Calyx lierbaceous. CHENOPODIACEAE. p. 241. 

 " Calyx and bracts scarious. AMARANTHACEAE. p. 244. 

 Stipules sheathing. Calyx colored. POLYGONACEAI-.. p. 245. 



GROUP 3. Floivers perfect, polygamous, or dioicous, not disposed 

 in aments ; calyx regular and often colored. Ovary 1-celled, or 

 rarely 2-celled, with 1 or few ovules in each cell; but the fruit 1- 

 celled and 1-seeded. Embryo not coiled around albumen. 



t Style or stigma one. 

 Calyx free, from the ovary. 



Flowers polygamo-dioicous. Anthers opening by valves. LAURACEAE. p. 251. 

 Flowers perfect. Anthers opening lengOiwise. THYMELEACEAE. p. 252. 



Calyx adnate to the ovary. 

 Ovules several, pendulous. SANTALACEAE. p. 253. 



Ovules solitari/, suspended. 

 Parasitic sJirubs. Ovule without integuments. LORANTHACEAE. p. 254. 



Trees. Fruit a drupe. NYSSACEAE. p. 253. 

 f t Styles or stigmas 2, divergent. ULMACEAE. p. 255. 



* Numerous plants of the DIALYPET ALDUS ORDERS are apetalons, such as 

 Clematis, Anemone, and other RANUNCULACEAE; some RHAMNACEAE, ONAGRA- 



CEAE, ROSACFAE, AcERACEAE, &C., &C. Some Of the GAMOPETALOUS ORDERS, alsO, 



are apetalous; as our species of Fraxinus, in OLEACEAE. 



