294 



half as long as the tube. The leaves are fully as much divided as 

 in the former, but the plant is more woolly. 



Lappula Americana (Gray). 



Echinosperminn deflexum var. Americamnn Gray, Proc. Am. 

 Acad. 17 : 224. 



I think this is quite distinct from the European L. defiexa. 

 The species of the Mississippi Valley and westward is a much larger 

 plant, with a many-flowered divergently paniculate-branched in- 

 florescence and broadly oblanceolate leaves. The European L. 

 defiexa has almost linear leaves. L. Americana was collected by 

 the author at Deer Lodge, Mont., in 1895 (no. 2775), a point 

 much further west than the supposed range of the species. 



Erigeron oblanceolatus. 



Stem from an apparently biennial root, 3-5 dm. high, striate, 

 finely strigose, branched above ; basal and lower leaves oblanceo- 

 late, tapering into a winged petiole, pointed, the margins ciliolate 

 and with a few small but sharp teeth ; stem-leaves linear, diminish- 

 ing upward, the uppermost bract-like; heads 1-3, comparatively 

 large, 15-25 mm. in diameter and about 10 mm. high; bracts 

 40-50, narrowly linear, acuminate, strigose; rays numerous, gen- 

 erally about 100, very narrow. 



In the size and form of the head and bracts it most resembles 

 E. spcciosiis and E. sidytrinervis. In general habit it resembles some- 

 what E. glabelliis Nutt., but differs by the much larger heads, the 

 toothing of the lower leaves and the weak root system, which indi- 

 cates a biennial, or a perennial by biennial offsets (the specimens 

 show no stolons). In the latter case the plant should be placed 

 nearest E. PJiUadelphicus, from which it is easily distinguished by 

 the thin narrow leaves, the form and size of their teeth and by the 

 few and larger heads. 



Montana: Deer Lodge, July 10, 1895, collected by the author, 

 no. 2822; Helena, June, 1S89, by F. D. Kelsey. 



Erigeron asperugineus (D. C. Eaton) Gray, Proc. Am. Acad. 16: 



91. 1882. 

 Aster aspeniginens D. C. Eaton, Bot. King's Exp. 142. 1871. 

 This species was collected at Melrose, Mont, July 6, 1895, no. 

 2823. 



Erigeron subcanescens. 



Diplopappns canesccns Hook. Fl. Bor. Am. 2:21, 1834. 



