Vermischte neue Diagnosen. 399 
outline; deeply pinnatifid and with open sinuses, the lobes toothed and 
spinescent, upper face green and sparsely scabrous, or some of the 
scabrous points developing a hair: peduncles slender, mostly mono- 
cephalous; heads about 1!/, inches high, campanulate, the many bracts 
longsubulate, slenderly spinous from near the base and blackish, but, 
almost to the tips embedded in loose arachnoid wool: corollas rose-purple 
to dark-violet: anther-tips very acute, white: pappus-bristles very finely 
and loosely plumose except at the tip. 
British Columbia: Chilliwack Valley, 13 June, 1901, collected by 
Mr. James Macoun (numbers 26451 and 26452). The species is well 
marked by the characters of its involucre, and more so by its perennial 
duration; the roots of almost all American species of this genus being 
strietly biennial. 
223. Erigeron acutatus Greene, Le, p. 38. 
Stems solitary, 4 to 6 inches high from an ascending rootstock, 
without distinctively basal clustered leaves, but leafy up to near the 
solitary short-peduncled large and showy head; stem canescently pubes- 
cent with short villous appressed hairs, the foliage green but pubescent 
on and along the margin; lowest leaves oblong-linear, 2 inches long, 
abruptly acutish, short-petiolate, the others lanceolate, acute, usually 
apiculate, sessile, an inch long more or less: involucre hemispherical, its 
numerous equal somewhat biserial bracts linear, tapering to a slender 
recurved purple tip, not at all pubescent, but glandular-viscid: rays many, 
broad as those of an Aster, pinkish or purple. 
British Columbia: Chilliwack Valley, at about 5000 feet, 29 July 
1901, J. M. Macoun, number 26469. A small-sized relative of E. sal- 
suginosus, though of different underground growth, and inhabiting damp 
mossy places partly in shade. 
224. Erigeron obtusatus Greene, |. c., p. 38. 
Smaller than the last, as to stature, only 3 or 4 inches high, much 
less leafy and with more showy heads: lowest leaves from round-obo- 
vate and retuse to oblanceolate and obtuse, !/; to 1 inch long, short- 
petiolate, glabrous on both faces, but the margins finely pubescent: 
cauline leaves few and scattered, subulate-lanceolate, acute: bracts of 
the hemispherical involucre more numerous, less acuminate, more 
distinctly glandular-pubescent: rays many, rather broad, pink or rose- 
purple. 
British Columbia: Growing on rocky slopes, dry at time of 
collecting but wet earlier in season; altitude 6000 feet, being Mr. 
Macoun's number 26470; from the Chilliwack Valley, 29 August 1901. 
295. Senecio crepidineus Greene in Ottawa Nat., XV (1902), p. 250. 
Perennial, low but rather stout and very leafy, allied to S. /araxa- 
coides and S. Holmii, commonly 4 to 7 inches high, lightly somewhat 
arachnoid or floccose-pubescent, or often almost glabrous: leaves mostly 
basal and supra-basal, the one or two properly cauline quite similar to, 
