26 NORTH AMERICAN 



244. PARTHENIUM AMPLECTENS Raf. P. in- 

 tegrifolium L. and Authors? Stem angular 

 rough elate, leaves all rough ovate oblong am- 

 plexicaule serrate acute, corymb lax, fol. of pe- 

 rianthe ovate rounded acute carinate. Glades 

 of Kentucky, 2 to 4 feet high, leaves 3 to 6 

 inches long, lower hardly attenuate at base, 

 flowers whitish. P. integrif. is a name illu- 

 sive and to be abolished, it was given by Lin. 

 in contrast with P. hysterophorus with multi- 

 fid leaves, that now is a peculiar Genus. The 

 Linnean sp. figured in Dillen and Plukenet had 

 leaves ovate crenate hirsute, lower with cari- 

 nate petiols, upper sessile, flowers snowy white, 

 tip of perianthe black, and may still be differ- 

 ent from all mine, found in Virginia, might be 

 called P. dillenianum ? The sp. of Elliot is 

 still somewhat different, it may be called P. 

 elliotanum? stem 1 or 2 feet striate roughish, 

 leaves rough toothed ovate lanceolate ; lower 

 sessile, upper amplexicaule as near to P. an- 

 gustifoUum as to this. See 280. 



245. URTICA VERNA Raf. nearly smooth, 

 stem simple slender, leaves remote opposite pe- 

 tiola/e acuminate laciniate serrate, the lower 

 cordate, medial ovate, upper lanceolate ; male 

 spikes inferior shorter than petiols, female fl. 

 glomerate above, glornerules nodding geminate 

 peduncled. Kentucky and other Western 

 States, in woods, flowers vernal in may, pedal, 

 leaves small, a true Urtica with male fl. 4 part- 

 ed 4andre. Var. gracilis very slender virgate, 

 leaves small none cordate. 



246. OXALIS RUPESTRIS Raf. stem erect an- 

 gular rufous pilose, leaves glaucous smooth, 

 folioles obcordate, sinus obtuse, peduncles lon- 

 ger than leaves 3-5flore, sepals lanceolate, pe- 



