RYDBERG: Rocky MOUNTAIN FLORA 137 
florescence corymbiform ; heads solitary on branches with lance- 
olate bract-like leaves; involucre 8-10 mm. high, 12-15 mm. 
broad ; bracts oblanceolate, squarrose, acute and spinulose-tipped, 
pubescent on the back and ciliate on the margins; rays 7-8 mm. 
long, rose-colored ; achenes strigose, pappus pinkish tawny. 
This species combines the characters of two different groups 
of asters. It has the habit, leaves, middle-sized heads, pappus, 
and pubescence of the bracts of Aster Nelsonit, A. griseus, and their 
allies, but has the spinulose- or callus-tipped bracts and upper 
leaves of A. multifiorus, A commutatus, etc. 
Canada: Old Wives Lake, Northwest Territory [Keewatin], 
July, 1880, John Macoun (type, in herb. Columbia Univ.). 
AsTeR Linpieyanus T. & G. Fl. N. Am. 2: 122. 1841 
Aster paniculatus, var. 0 Lindl. in Hook. Fl. Bor.-Am, 2: 8. 1834. 
Dr. Gray in his Synoptical Flora* stated: ‘The original of 
this species was raised by Gordon from Labrador seeds and has 
more extended inflorescence of smaller heads than is common in 
the wild plant.” Dr. Gray evidently referred to Aster paniculatus 
Ait. ;+ however, A. Lindleyanus was not based on A. paniculatus 
Ait., but principally on A. paniculatus, var. 0 of Lindley in Hooker's 
Flora, although A. paniculatus of the same work was partly in- 
cluded. The var. 0 was collected by Richardson near Slave Lake. 
Whether this plant is the same as A. paniculatus Ait. is very 
doubtful. Aster Lindleyanus has been reported from many stations 
in eastern North America as far south as Ohio, but the eastern 
plant differs somewhat from that of the Mackenzie basin and the 
northern Rockies in thinner more decidedly cordate basal leaves, 
and in its bracts with more conspicuous green tips. As these 
differences are hardly specific it is best to leave the eastern plant 
in A. Vindleyanus. In the northern Rockies and the Saskatchewan 
region there are found plants which have been referred to 4. 
Lindlejanus but which the writer thinks are distinct. They can be 
distinguished as follows : 
Basal leaf-llades cordate or cme! ovate; upper stem-leaves lance- 
olate, achenes glabrou 
Petioles,midribs, and wall also the stem pubescent with long 
white hairs A. Wilsonii, 
72: 18h 1884. 
¢ Hort. Kew. 3: 207. 1789. 
