38 The Ottawa Naturalist. [May 



Carduus Macounii. Perennial, slender, simple or branched 

 above, i to 3 feet high, the stem and also the leaves beneath 

 arachnoid-hoary ; leaves of oblong 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 monocephalous ; 

 heads about i^ inches high, campanulate, the many bracts long- 

 subulate, 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. 



Chilliwack Valley, B.C., 13 June, 1901, collected by Mr. 

 James MacQun (numbers 26,451 and 26,452). 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 strictly biennial. 



Erigeron acutatus. 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 pubescent with short villous ap- 

 pressed 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 hemis- 

 pherical, 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. 



Chilliwack Valley, B.C., at about 5,000 feet, 2q July, igoi, 

 J. M. Macoun, number 26,469. A small-sized relative of E. sal- 

 suginosus, though of different underground growth, and inhabiting 

 damp mossy places partly in shade. 



Erigeron obtusatus. 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-obovate and retuse to oblance- 

 olate and obtuse, ^ to i inch long, short-petiolate, glabrous on 



