•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 

 multiflore, stamens not exerted. — A var. cuni- 

 loides has stem smaller, leaves subsessile smal- 

 ler sometimes subentire. ^uhg. 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 F.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 Tullya, lower 

 lip of corolla equaly trilobe, lobes short rounded 

 upper entire 't as in Tullya. 



982. 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, ijoticed since 1802, 

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

 losa^ having both they are very different from 



