F NORTH AMERICA. 95 



980. PYCNANTHES SAXATILIS R. stem ramose 

 tomentose, angles obtuse, leaves glaucous sub- 

 petiolate ovate acuminate remotely serrate, 

 hardly pubescent punctate reticulate on both 

 sides; heads terminal sessile, bracts and calix 

 lanceolate mutic canescent tomentose in the 

 Alleghany Mts. near the R, Susquehannah 

 among stones and rocks, 1 or 2 feet high, 

 branches patent, leaves ultra uncial, capitules 

 multitiore, stamens not exerted. A var. cuni- 

 loides has stem smaller, leaves subsessile smal- 

 ler sometimes subentire. Subg. Brachystemon. 



981. PYCNANTHES PARVIFOLIA R. smooth, 

 stem branched acutely 4gone, leaves small sub- 

 sessile ovatoblong entire, ending by an obtuse 

 callose point ; heads terminal sessile lax dicho- 

 tome, bracts lanceolate nervose, the nerve pro- 

 truding in a long stiff fulvous bristle, calix brist- 

 ly a very distinct sp. found by Leconte in Flo- 

 rida and Georgia, anonymous in Coll. herb, pe- 

 dal, while leaves 4 to 6 lines long, bristles of 

 bracts as long as them formed by the nerve ex- 

 tending out. Very different from P.aristata, 

 stamens not exerted. Perhaps a peculiar sub- 

 genus Xetalix R. with all aristate sp. here the 

 calix is equal else it would be a jfW//t/a, lower 

 lip of corolla equaly trilobe, lobes short rounded 

 upper entire ? as in Tullya. 



98*2. PYCNANTHES CILIATA R. stem branched 

 pilose 4gone, leaves subsessile glaucous lanceo- 

 late elongate acute at both ends subentire, 

 smooth, margin and nerves ciliate, heads termi- 

 nal sessile canescent pilose lax, bracts and calix 

 subulate aristate bristles ciliate in N. Jersey 

 pine barrens and Maryland, noticed since 1802, 

 deemed P. aristata by some, nearer to P. pt- 

 , having both they are very different from 



