ORDEK LXXIX. ASCLEPIADACE^E. 433 



I. S. mari'tima, (D. C.) Stem glabrous, climbing. Leaves opposite 

 sessile, linear, channeled; succulent. Umbels 9 — 10-flowered, solitary, 

 axillary ; calyx small ; sepals erect, acute ; leaves of the stamineal 

 crown oval, obtuse, white. — Greenish. June — Oct. On lands over- 

 flowed by salt water. Lyoni maritima, E1L 



Genus VI.— GONOLO'BUS. L. 18—5. 

 (From the Greek gonia, an angle, and lottos, a pod.) 



Calyx small. Corolla rotate, 5-parted. Stamineal crown 

 shield-form, lobed. Stamens 5. Anthers opening transversely. 

 Pollen masses 10, in 5 pairs. Stigma flattened. Follicles 2, 

 ventricose. Seed comose. 



1. G. Carolinen'sis, (Mich.) Stem climbing, pubescent. Leaves ob- 

 long, cordate, acuminate, slightly auriculate, pubescent. Flowers in ax- 

 illary umbels; segments of the corolla long, obtuse; follicles ribbed, 

 angular. — Purple. 1£. May — Aug. Clay soils. G. hirsutus, Mich. 



2. G. macrophyl'lus, (Mich.) Stem climbing over small shrubs, pu- 

 bescent. Leaves opposite, broad-cordate, acuminate, pubescent. Flow- 

 ers in axillary umbels ; segments of the corolla obtuse ; follicles murieate 

 — Obscure yellow. 2£. June — Aug. Light soils. 



Genus VII.— METASTEL'MA. Br 

 (From meta, behind, and stebna, a girdle.) 



Calyx small, 5-leaved. Corolla sub-campanulate ; lobes 

 with white hairs within. Stamineal crown 5-leaved ; leaves sim- 

 ple ; anthers terminated by a membrane ; pollen masses ovoid, 

 compressed, attached by the apex. Follicles smooth, slender. 

 Seeds comose. 



1. M. Fra'seri, (Decai.) Herbaceous plant, erect, smooth. Leaves 

 oval or ovate, mucronate, or acuminate smooth. Lobes of the corolla 

 ovate, acute. — Greenish. Carolina. 



Genus VIII— CHTHAMA'LIA. Decai. 



(From chthamalos, on the ground.) 



Calyx 5-parted, lobes ovate-pubescent. Corolla campanulate, 

 with a short tube ; limb 5-parted, lobes erect, ovate-oblong. 

 Stamineal crown campanulate. Follicles ovoid, fleshy. Seeds 

 hairy. 



1. C. pubiflo'ra, (Decai ) Decumbent, puberulent ; branches terete, 

 6lender. Lower leaves sub-reniform ; upper ones ovate-cordate, acute, 

 puberulent. Flowers 3 — 4 ; lobes of the corolla villous within. — Car. 



There are many interesting exotics belonging to this order. The Hoya carnosa^ 

 the Wax Plant, is a plant from the East Indies, and receives its common same from 

 Its wax-like flowers. The Stapelias, from the Cape of Good Hope, are singular 



Slants, and readily distinguished by their disgusting odor; hence called carrion 

 owera. 



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