232 GAMOPETALOUS EXOQENS 



Obs. This has long been confounded with, or mistaken for, G. 

 ochroleuca; but Dr. GRAY has finally determined its character. 



4. r. Andre wsii, Griseb. Smooth; leaves ovate-lanceolate, 



acute ; corolla ventricose-clavate, the lobes and appendages con- 



nivent, closing the mouth. 



G. Saponaria. FL Cestr. ed. 2. p. 165. not of L. 



ANDREWS'S GENTIANA. Closed Gentian. 



Stem 1 to 2 feet high. Leaves about 3 inches long, subconnate by a sheathing 

 membrane, 3-nerved, roughish on the margin. Flowers chiefly in a dense ter- 

 minal sessile fascicle, with' bract-like leaves at base, often with few-flowered 

 pedunculate fascicles in the axils below ; calyx-tube half an inch long, the seg- 

 ments lance-ovate, minutely ciliate, about half the length of the tube ; corolla 2 

 inches long, contracted and nearly closed at sunftnit, bright blue, paler in the 

 folds ; outer lobes very short, or obsolete, the inner ones lacerate-serrate ; anthers 

 cohering ; seeds broadly margined. 

 Hob. Low grounds ; margins of Swamps : frequent. Fl. Sept. Fr. Nov. 



Obs. This pretty species has long passed for G. Saponaria, among 

 the Botanists of the northern and middle States ; and, in fact, it 

 more nearly resembles Saponaria officinalis, in habit, than the one 

 named for it, by LINNAEUS. 



SUBORDER II. OBOLARIE V AE. 



Calyx 2-leaved; corolla-lobes imbricated in the bud; ovules covering the whole 

 inner surface of the ovary ! 



335. OBOLA'RIA, L. 



[Gr. Obolos, a small Athenian coin ; from the form of the leaves.] 

 Calyx of 2 distinct, spatulate, bract-like sepals. Corolla tubular- 

 campanulate, 4-lobed, withering and persistent. Stamens inserted 

 at the sinuses of the corolla, short. Style short, persistent; stigma 

 2-lipped. Capsule ovoid, partly 2- to 4-celled; seeds numerous, 

 very minute. A low, smooth, purplish-green perennial? flowers 

 axillary and terminal. 



O. Virglnica, L. Leaves somewhat fleshy, cuneate-obovate, or 

 sub-rhomboid, often truncate, sessile and slightly decurrent. 

 VIRGINIAN OBOLARIA. Penny-wort. 



Stem 3 to 6 or 8 inches high, often several from the same root, simple, or with a 

 few axillary branches above. Leaves % to % an inch long, somewhat crowded 

 above, the lower ones in distant pairs, and very small. Flowers opposite, or ter- 

 minal in threes, subsessile ; sepals resembling the leaves; corolla pale purple, or 

 sometimes nearly white. 

 Hob. Kich woodlands, among dead leaves : frequent. Fl. April. Fr. June. 



ORDER LXXII. APOCYNACEAE. 



Plants with a milky juice; leaves entire, mostly opposite, without stipules ; flowers 

 regular, pentamerous and pentandrous ; corolla-lobes convolute and twisted in the 

 bud; stamens alternate with the lobes ; filaments mostly distinct; pollen granular; 

 fruit usually & follicle, with the seeds comose, sparingly albuminous. 



336. APO'CYMJIrl, Tournef. 



[Gr. Apo, far from, and Kyon, a dog; being thought destructive of that animal.] 

 Calyx 5-parted. Corolla campanulate, 6-lobed, with 5 triangular 



