GENUS 31. THISTLE FAMILY. 429 
61. Aster missouriénsis Britton. Missouri 
Aster. Fig. 4342. 
Aster missouriensis Britton, in Britt. & Brown, Ill. Fl. 3: 
378. 1898. 
Stem densely puberulent or pubescent, at least 
above, much branched, 2° high or more. Leaves thin, 
oblong-lanceolate to oblanceolate, acute or acumi- 
nate at the apex, sharply serrate above the middle, 
gradually tapering to an entire sessile or slightly 
clasping base, or the lower petioled, puberulent above, 
finely pubescent beneath, the larger 3-4’ long, the 
upper much smaller, entire; heads 6-8” broad, pan- 
icled, short-peduncled, or terminating short leafy 
branchlets, sometimes somewhat secund; involucre 
2-3” high, its linear acute bracts well imbricated, 
ciliate or pubescent; rays white. 
In moist soil, Kansas, Missouri and Iowa. Sept.—Oct. 
62. Aster Tradescanti L. Tradescant’s 
Aster. Michaelmas Daisy. Fig. 4343. 
Sj 
Ni, BZ Z Aster Tradescanti L. Sp. Pl. 876. 1753. 
N\ 
SS 
= 
Stem slender, paniculately branched, 2°-5° high, 
the branches usually ascending and often pubes- 
cent in lines. Stem leaves linear-lanceolate or . 
lanceolate, acuminate at the apex, narrowed to a 
sessile base, 3-6’ long, 14’-6” wide, glabrous or 
nearly so on both sides, commonly thin, sharply 
serrate in the middle with low teeth, or sometimes 
entire; heads very numerous, racemose but not 
secund on the branches, 5-8” broad; involucre 
hemispheric to broadly turbinate, 2”-3” high, its 
bracts linear, acute, appressed, green-tipped, im- 
bricated in 4 or 5 series; rays white or nearly so, 
numerous, 2”-3” long; pappus white; achenes 
minutely pubescent. ° 
In fields and swamps, Maine to Virginia, Ontario, 
Illinois and Missouri. Aug.—Oct. 
Aster saxatilis (Fernald) Blanchard, of rocky situ- 
ations in New England, appears to be a low race of 
this species, rather than of A. vimineus. 
63. Aster Faxoni Porter. Faxon’s Aster. 
Fig. 4344. 
Aster polyphyllus Willd. Enum. 888. 1809. Not Moench, 
1802. ‘ 
Aster Faxoni Porter, Mem. Torr. Club 5: 323. 1894. 
A, ericoides Randi Britton, in Britt. & Brown, Il. Fl. 3: 
379. 18098. 
Glabrous throughout; stem paniculately or corym- 
bosely branched; rather stout, #°-5° high. Stem 
leaves lanceolate or linear-lanceolate, acute or acumi- 
nate, narrowed to a sessile base, or the lower into 
margined petioles, entire or nearly so, firm, 2’-5’, 
long, 2-4” wide, those of the branches gradually 
smaller; basal leaves oblong to spatulate, obtuse, 
dentate, or entire; heads not very numerous, 6-9” 
broad; involucre hemispheric, nearly 4” high, its 
bracts linear-lanceolate, acute or subulate, green- 
tipped or green on the back, imbricated in about 3 
series, the outer shorter; rays bright white, rarely 
purplish, 3”-4’ long, numerous; pappus white; 
achenes minutely pubescent. 
On moist cliffs, Maine and Vermont to Pennsylvania, 
Wisconsin and North Carolina. Aug.—Sept. 
