144 RypsBerGc: Rocky MounTAIN FLORA 
description agrees with the original diagnosis of Aster occidentalts. 
It may be that the plant described by Gray should receive a new 
name. I have not seen Nuttall’s type and shall await the chance 
of seeing it before making such a change. 
ALBERTA: Laggan, Lake Louise region, alt. 1950 m., Aug. 
23, 1902, Rosendahl ro8g (type, in herb. N. Y. Bot. Gard.) ; 
also ro6r, 
Ipano: Priest Lake, Aug. 1901, Piper 4120, 3723, 3682. 
Montana: Rost Lake, July 15-16, 1901, MacDougal 661; 
Big Fork, July 24, 1908, Butler 697. 
‘ Aster Umbachii sp. nov. 
Perennia!, with a slender rootstock ; stem slender, erect, simple, 
glabrous below, sparingly pilose above, 3-5 dm. high ; lower leaves 
about 1 dm. long, petioled ; blades broadly oblanceolate or lance- 
olate, dark green, more or less crenate, acute, glabrous, ciliolate 
on the margins ; middle stem-leaves similar but the petioles with 
dilated, clasping bases ; upper stem-leaves lanceolate, sessile ; heads 
I—3 in a corymbiform inflorescence ; involucres 8—g mm. high, 
12-15 mm. broad; bracts in about 2 series, oblong-oblanceolate, 
acute, not very unlike in length, glabrous, slightly ciliate, with 
broad lanceolate green tips; rays dark bluish-purple, fully 1 cm. 
long; achenes almost glabrous ; pappus tawny. 
This species is most nearly related to Aster ciliomarginatus 
Rydb. (A. glastifolius Greene) ; but differs in the dark green and 
mostly crenate leaves and broader and more conspicuously green- 
tipped bracts. In A. ciliomarginatus the leaves are light green, 
more or less glaucous and entire. 
Montana: River bank, Lake McDonald, Aug. 20, 1901, 
Umbach 275 (type, in herb. N. Y. Bot. Gard.); also 267. 
“ Aster Mearnsii sp. nov. 
Perennial, with a rootstock; stem 3-10 dm. high, leafy, 
branched, glabrous below, sparingly pubescent above ; leaves 
linear, 5-10 cm. long, ascending-spreading, sessile, entire, gla- 
brous and smooth beneath, scabrous or glabrate above, scabrous- 
ciliolate on the margins ; inflorescence large, paniculate, leafy ; 
heads numerous, disk about 8 mm. high and barely 1 cm. broad ; 
bracts oblanceolate, acute, some longer than the disk ; rays about 
8 mm. long, white or pinkish ; achenes strigulose, 
