198 BOTANICAL GAZETTE | SEPTEMBER 
or glandular hairs, and from both by its less erect habit and by its broad, 
colored involucral bracts. 
It occurred in the greatest abundance in one locality only, an open, sandy 
hillside near Yellowstone lake. he depressed, mat-like plants, with their 
relatively large, showy heads, were singularly attractive and invited the 
closest attention. The type number is 6337, from the Thumb, August 6, 
1899. 
Erigeron Yellowstonensis.— Biennial, or probably many of the 
plants more enduring, with a strong vertical tap root: generally 
only one stem from the enlarged crown (more rarely 2-5), sim 
ple, stout, striate, erect, paniculately branched as to the inflo- 
rescence, 3-6™ high, purplish, glabrate, the whitish hairs very 
straggling, obscurely granular (scarcely glutinous): leaves 
numerous, pubescence nearly wanting, similar to that of the 
stem; crown leaves oblanceolate, petioles 3-6™ long; lower 
stem leaves similar but with short winged petioles; uppe! 
leaves sessile, narrowly lanceolate, not much reduced, the short 
branches of the panicle from their axils; bracts small, linear: 
heads numerous, on rather slender peduncles ; involucral bracts 
dark green, in two rows, subequal, very narrow, acuminate, 
shorter than the 1-™ high disk: flowers very numerous; rays 
filiform, purplish, only moderately numerous, largely concealed 
by copious pappus : akenes linear, appearing glabrous but sparselj 
pubescent under the microscope, less than 2™™ long; the soft 
dirty-white pappus nearly three times as long. 
) Blytt) a 
into the 
Plant now proposed as a species. Neither does it seem probable th 
other usually accepted synonyms of £. Drocbachensis represent th of 
they also refer to European or arctic forms, except the £. a . 
ooker’s Flora. The latter seems to have spatulate root-leaves, wel = 
Ones almost linear; a racemiform inflorescence, with very long lower P 
cles, making an approach to a corymb; the pappus of a more yellowish 
: This plant was found in abundance near Yellowstone lake, 0 o 
_ in loose sandy soil: nos, 6348 and 6615, the Thumb, : 
ERIGERON MULTIFIDUS incertus.—-Caudex densely cespiton” 
its branches comparatively long and woody, roughened with 
is plant, for 
the 
a 
at 
