SYNGENESIA SUPERFLUA. 



325 



1. POLYCEPHALUM. 



G. herbaceum, erec- | Herbaceous, 



J 



Greet 

 turn; foliis lineari-laiice- I leaves liiiear-Ianceo 



olatis acutis, supra gla- late, acute, glabrous on 



bris, subtus pubescen 



the upper surface, pu 



tibus; caule paniculato, [ bescent underneath 

 tomentoso; corymbis | stem paniculate, to 



mentose; corymbs ter 

 minal, clustered. 



5 



terminahbus 

 tis. 



coarcta 



Mich. 2. p. 127. Pursh, 2. p. 524. 



G. Obtusifolium. Sp. pi. 3. p. 1880. Walt. p. 203. 



Root annual ? Stem one to two feet high, branching near the summit, 

 covered with a white tomentum. Leaves alternate, sessile, linear-lanceo- 

 late, nearly acute, entire, slightly undulate, nearly glabrous on the upper 

 surface, tomentose, white underneath. Flowers in large terminal corymbs, 

 composed of heads aggregated in small clusters. Inoolucrum imbricate, 

 conical, leaflets oblong, white, tomentose at base; female florets slender, yel- 

 lowish m the border, five toothed, stamens none, style longer than the corolla : 

 hermaphrodite florets with the corolla funnel shaped, yellowish, the border 

 five-cleft, stamens as long as the corolla. Seeds cylindrical, glabrous. Pap- 

 pus hairy, as long as the corolla. Receptacle naked, flat, dotted. 



Grow s in dry pastures — very common. 



Flowers September — October. 



2. PURPCREUM. 



G. herbaceum; fohis 

 lineari-spathulatis, sub- 

 tus tomentosis; caule e- 

 recto, simplicissimo; 

 floribus sessilibus, glo- 

 Rieratis, terminalibus 

 axillaribusque. 



Herbaceous; leaves 

 linear spathulate, to- 

 mentose underneath 

 stem erect, simple; 



5 



flowers sessile, cluster 

 ed, axillary and termi- 

 nal. 



Sp. pi 3. p. 1884. Mich. 2. p. 127. Pursh, 2. p. 525 

 Gnaphalium Hyemale. Walt. p. 203. 



Root perennial, stoloniferous. «.c«» v-ic^i 

 tose and white, twelv« to eighteen inches high, ^^uvc^ »c«uc, uu.u.v.. uuu- 

 ate, slightly mucronate, entire, undulate, obscurely triplinerved, tomentose, 

 particularly on the lower surface, which, like the stem, is white. Fiotvers 



Stem erect and assurgent, simple, tomen- 



Leat-es sessile, oblon 7. obo- 



