186 



DIADELPHIA- OCTANDRIA. 



12. ViRIDESCENS. 



P. caule simplici; fo- 

 liis cuneato-obovatis, 

 obtusis ; capitulis cy- 

 lindraceis, scjiiarrosis; 

 jfloribus viridescenti- 



; alls calycinis 



Stem simple; leaves 

 cimeate, obovate, ob- 



tuse 



bus 



longe acuminatis. 



E. 



heads cylindri- 

 cal, squarrose; flowers 



calycine 

 conspicuously 



greenish 



winss 



acuminated. 



Sp. pi. 3. p. 895. Nutt. 2. p. 88. 

 P. lutea var. nana. Mich. 2. p. 54. 



Stem simple, 1 — 4 inches long. Leaves cuneate or spatlnilate, with the 

 attenuated base sometimes 2 inches long. Flowers m a long cylindrical 

 head. 



Caly 



wings twice as long as the corolla, lanceolate, and witl 



1 



a setaceous point, giving the head a squarrose appearance, green, just tin- 

 ged with yellow. Keel of the corolla yellowish at the summit, fimbriate. 

 Stamens, as in most of the capitate species, 6. Seeds a little hairy. 

 Grows in damp pine barrens. 



Flowers tlu'ough the sumtuer. 



#*** Floribus co^ 

 rymbosis. 



13. Ramosa. 



p. caule erectOjfere 



corymhs. 



Flowers in 



ab imo ramoso 5 foiiis 

 infer ioribus spathula 

 to-obovatis, caulinis 

 linearibus, aequalibus ; 



Stem erect, branch- 

 ing from the base ; 

 lower leaves spathu- 



late 



obovate. 



stem 

 lal 



? 



floribus 



rymbosis. 



capitato-co 



leaves linear, eqi 

 flowers somewhat ca 

 pit ate, the heads form- 

 ing corymbs. 



X 



P. Corymbosa. Nutt. 2. p. 89. 



Stem 8 — 12 inches high, angled^ branching sometimes abnost from the 

 base. Lower leaves obovate^ spathiilate ; stem leaves linear, lanceolate, 

 nearly of the same size to the summit of the stem. Flowers in small 

 loose heads, forming a very irregular corymb. Cuhjciat wingH much long- 

 er than the capsule, oval, lanceolate, mucronate, but never forming com- 



tjact, squarrose heads as in the following species. 



Calycine wings and the 



