322 ORDER LYIII. CRASSULACE.E. 



Order LVL— CACTA'CE^E. Juss. 



Sepals numerous, indefinite, confounded with the petals, im- 

 bricate. Petals numerous, indefinite, arising from the orifice of 

 the calyx. Stamens numerous, indefinite, with long, filiform 

 filaments, and versatile, ovate anthers. Ovary 1 -celled, coher- 

 ing to the calyx, with parietal placenta?, fleshy. Fruit 1 -celled, 

 many-seeded, succulent. Seeds anatropous, with no albumen. 

 Succulent plants, generally destitute of leaves. Flowers sessile. 



Genus I— OPUNTIA. Tourn. 11—1. (Cactus, L.) 

 (From Opus, a city of Locris.) 



Sepals numerous, adhering to the ovary. Petals numerous, 

 obovate, spreading. Stamens numerous, shorter than the pet- 

 als. Stigmas numerous, thick. Berry 1 -celled, tuberculate, 

 many-seeded. 



1. C. vulga'ris, (Mill.) Stem prostrate, creeping; joints compressed, 

 obovate ; spines setaceous. Flowers sessile on the margins of the artic- 

 ulations. Fruit obovate, pulpy. Seeds numerous, imbedded in a crim- 

 son pulp. — Yellow. It- Through the summer. Common. 



Order LVIL— SURIANA'CEJE. 



Sepals 5, persistent. Petals 5, inserted into the bottom of 

 the calyx. Stamens 5, sometimes with 5 abortive ones. Torus 

 fleshy. Ovaries 5, each with a long style ; ovules in pairs, 

 erect. Fruit 5 coriaceous carpels. Seeds solitary, uncinate. 

 Shrubs. 



Genus I.— SURIA'NA. Plum. 5—5. 



Genus same as the order. 



1. S. mariti'ma, (L.) Leaves simple, oblong-spatulate, pubescent, 

 crowded at the tops of the branches. Flowers bracteate. — Yellow. ^ . 

 Sea-eoast of Southern Florida. 



Order LVIIL— CRASSULA'CE^E. 



Calyx 4 — 5-cleft, persistent. Petals 4 — 5, with as many 

 hypogynoua scales at the base of the ovary. Ovaries 5, gener- 

 ally distinct ; ovules numerous. Carpels many-seeded, open- 

 ing by the inner suture. Seeds anatropous. More or less suc- 

 culent plants. 



Gents I.— SE'DTJM. L. 10—5. 



(From sedeo, to sit; manner of growth, sitting upon rocks.) 



Calyx 5-clofr, inferior. Corolla 4 — 5-petaIed. Stamens 10. 

 Styles 5. Cupsnhs o, with 5 nectariferous scales at the base 

 of the germ. 



