SYNGENESIA ^QUALIS. 



315 



Root perennial. Stem erect, four to six feet high, quadrangular, deeply 

 furrowed, scabrous, spotted, branching. Leaves opposite, decussate on the 

 angles of the stem, hastate, lanceolate, acute, toothed, scabrous, somewhat 

 hispid, tripliiierved, on petioles one to two inches long. Peduncles some- 

 what terminal, frequently by pairs, bearing each one head of flowers. Incolu- 

 m//w sixteen to twenty leaved, in two rows, leaflets equal, oblong-lanceo- 

 late, hispid, a little shorter than the corolla. CoroUa tubular, pubescent, 

 very white, border five-cleft. Stamem as long as the corolla, black, with 

 their terminating summits white. Style as long as the stamens. Stigma 

 reflected, acute, glandular. Seed turbinate, quadrangular, compressed, the 

 two angles slightly winged. Pappus composed of two or three bristles, 

 shorter than the corolla, scabrous, with small erect prickles. Receptacle 



convex, paleaceous j scales lanceolate, acurauiate, scabrous, as long as the 

 corolla. 



Grows in dry rich soils. 



Flowers August — September. 



MARSHALLIA. Gen. Pl. 1762. 



Involucrum imbrica- I Involucrum imbricate, 

 turn. Pappus paleis 5, [ Pappus composed of 5, 

 membranaceis, enervi- j membranaceous,nerve 

 bus. Receptaculum pa- | less leaves. Recepta 

 leace 



urn. 



cle chaffy. 



1. Lanceolata. Mich, 



M. caiile simplici, in 



Stem simple 



leafy 



ferne folioso, superne below, naked near the 

 nudato; foliis radicali- summit; leaves of the 



bus obovatis, eaulinis 

 longo-Ianceolatis 



m 



stem 



9 



root obovate, of the 



long, lanceolate 

 volucri foliolis ovali- [ scales of the involu- 

 ousj paleis spathulatis. | crum ovalj chaff spa- 



thulate. 



Pursh, 2. p. 519. Nutt. 2. p. 140. 

 rersoonia Lanceolata. Mich. 2. p. 105. 

 Athanasla Obovata. Walt. p. 201 . 



^oot perennial. Stem eighteen to twenty-four inches high, striate, sim- 

 P«e, a little pubescent near the summit. Lower leaves obovate, those of the 



«uu lanceolate, all nerved, glabrous, entire, thin, with the base IcMig, taper- 



