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, 13-25 mm. in diameter and about to mm. high ; bracts 40-50, narrowly linear, acuminate, strigose; rays numerous, gen erally about loo, very narrow.
In the size and form of the head and bracts it most resembles E. spcciosus and E. subtrinervis. In general habit it resembles some
what E. glabellus 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. Philadelphiczts, 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 fo, 1895, collected by the author, no. 2822; Helena, June, 1889, by F. D. Kelsey.