274 ORDER 100. ASCLT-PIADACE^E. 



of the crown 5, free, each terminated by 2 filiform, flexuous lobes. Pol- 

 linia oblong, pendulous. Stig. 5-angled, conical. Follicles cylindraceous, 

 smooth. ^ A. twining herb, with opposite, cordate leaves, and cream- 

 white flowers in small lateral corymbs. 

 E. albida N.W. and S. : common. 6 lOf. Clusters 5-8-flwd., fragrant. July, Aug. 



5. METASTELMA, Br. Cor. somewhat bell-form, segments incurved 

 at apex. Crown of 5 distinct scales. Stigma flat. Pods smooth, slender, 

 seeds comous. Lvs. cuspidate, smooth. Umb. of few small flowers. 

 M. Fraseri Dcsn. Leaves oval ; umbels sessile ; pet. ovate, ciliate, as .bng as the 



linear crown-scales. In Carolina (Fraser, in DC.). 

 M. Sclilecteiidahlii and other species grow in S. Fla. (Dr. Chapman.) 



6. SEUTERA, Reich. Sepals 5, lanceolate. Cor. rotate, segm. acute. 

 Crown on the base of the sessile anthers, of 5 retuse segments. Pollinia 

 ovoid, pendulous. Stigma bifid. Pods smooth, seeds comous. ^ Leaves 

 linear, fleshy. Umbels few-flowered. 



S maritima Dcsn. Salt marshes, S., twining on the rushes, &c. Leaves opposite, 

 1'. Umbels 7-10-flowered. Pet. greenish, crown short, white. June October. 



7. VINCETOXIOUM, Moench. Calyx and cor. 5-parted, wheel-form. 

 Crown a fleshy, 5-10-lobed disk. Anth. tipped with a membrane. Pollinia 

 and fruit as in Asclepias. U ^ Flowers small, in dense clusters. 



1 V. nigrum Moench. Herb somewhat twining, with lance-ovate, attenuately-acute 



leaves and small blackish clusters in the axils. Gardens and fields : rare. 



2 V. scoparium (N.) Shrubby at base, much branched ; leaves thin, linear, V ; clus 



ters short-stalked, downy, with few green flowers ; pods slender, 1'. Fla. 



8. GONOLOBUS, MX. Corolla subrotate, 5-parted, convolute in bud. 

 Crown a small, fleshy, undulate-lobed ring, attached to the throat of the 

 corolla. Anth. opening transversely beneath the stigma. Pollinia 5 pairs, 

 horizontal. Pods turgid, seeds comous. *> Leaves cordate. Umbels few- 

 flowered, short, extra-axillary. Flowers brownish. 



* GON6LOBUS proper. Cor. rotate, flat, lobes linear to oblong, smoothish. . .Nos. 13 



* CHTHAMALIA. Corolla bell-form, small (woolly), lobes ovate, \" long No. 4 



1 G. macropliyllus (and laevis) MX. Smooth, or with minute down and scattered 



hairs ; leaves short-pointed, base-lobes open ; umbels 5-flowered, buds conic-pointed ; 

 pet. linear-subulate, 4" ; pod smooth, ribbed. Shady banks, Va. to Ky., and S. 3 5f. 



2 G. oMiquus Br. Hirsute with spreading, unequal hairs ; leaves acuminate, base- 



lobes closed and some oblique ; umbels 2-5-flowered, buds oblong, pet. linoar-oblong 

 6" ; pod muricate, ribless. Banks, O. to Pa. and Ga. 3 5f. 



3 G. liirsutus MX. Hirsute; leaves acuminate; umbels 5-8-flowered, bud* cv*>id. 



petals oblong, 3", yellow, downy ; pod muricate. Woods, South. 4 Sf. 



4 G. prostratus Ell. Branches from base, prostrate, 612' ; leaves small (!'), reni- 



form-cordate ; umbels sessile, 3-5-flowered ; corolla segments ovate, 1", veiy woolly 

 inside, daik purple. Sands, Ga. (Dr. Feay). (Chthamalia pubera Dcsn.) 

 / 



9. PERIPLOCA, L. Cor. rotate, flat, 5-parted. Crown 5-cleft, tipped 

 with 5 filiform awns. Filaments distinct, anthers cohering. Pollinia 5, 

 each 4-lobed, single. Follicles 2, smooth, divaricate. 



