164; #859. 
306 
sessile or slightly stalked gynostegium (column), forming a hollow 
entire or undulate spreading surface near the level of the conical 
stigmas ; follicles naked, slender, attenuate at both ends or obtuse 
at the base. 
Twining herbs, or partly shrubby plants, of warm regions, with 
opposite glabrous pubescent or woolly leaves and umbellate 
sometimes fragrant and showy flowers. Some thirty species are 
known from North and South America, according to Schumann, 
extending from southern Utah to South Brazil and Argentina. 
The following species occur within the limits of the Ue 
States: 
PHILIBERTELLA CLAUSA (Jacq.). 
Cynauchum clausum Jacq. Select. Am. 1: 87. pl.60f. 2. 1763. 
Asclepias viminalis Swartz, Prodr. 53. 1788. 
Sarcostemma Brown G. F. W. Meyer, Prim. Fl. Esseq. 139. 
1818, - 
Sarcostemma clausum Roem. & Schult. Syst. Veg. 6: 114. 1820. 
Sarcostemma crassifolum Chapm. Fl. 368. 1860. Not De- - 
caisne, 1844. 
Philibertia viminalis A. Gray, Proc.Am. Acad. 12: 64. 1876. 
Very variable. Some of the narrower leaved forms are so 
close to Philibertella crassifolia (Decsne) and Philibertella Cumanen- 
sis (H.B.K.) as to possibly include them both.  Phzlibertella 
Palmert (A. Gray), another closely related species, may also, on 
further study of the Mexican species, prove to be a more pubes- 
cent and broader leaved form of P. clausa. 
Original locality, Cartagena, Columbia. 
Florida: Key West, Blodgett; Indian River, A. H. Curtiss, 
no. 2306, Palm Beach, Webber, no. 68. 
Demerara: Jenman, no 4381. 
New Granada: Holton, no. 458, 1853. 
British Guiana: Jenman, no. 2025. 
PHILIBERTELLA CRISPA (Benth.) 
Sarcostemma crispum Benth, Pl. Hartw. 291. 184I. 
Sarcostemma mndnlai Torr. Bot. Mex. Bound. Surv. 161. 
1859. 
Sarcostemma heterophyllum var? Torr. Bot. Mex. Bound. Ours: 
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