310 SHELDON: New SPECIES FROM THE PaciFic COAST 
“ Aster umbraticus Sheldon sp. nov. 
Erect, stems slender, glabrate, purplish, simple, often several 
from the same root, 15-30 dm. high: leaves thin, sessile, gla- 
brous, the margins scabrous, lanceolate, acuminate, divergent, den- 
tate, with small remote salient teeth, or entire, becoming smaller 
above : inflorescence loosely paniculate, the heads 2 cm. broad, 
singly terminating the slender branchlets : involucral bracts acute, 
2 cm. long, green with scarious margins ; rays linear strap-shaped, 
lilac: achene very small, brownish, glabrous. 
Nearly related to Aster foliaceus Lindl., but different from any 
of the numerous varieties of that species. 
This plant grows in semi-shaded places along the banks of the 
lower Willamette River. The type is from University Park, Mult- 
nomah Co., Oregon, Sept. 14, 1902, no. 11310. 
V Artemisia arachnoidea Sheldon sp. nov. 
Perennial : stems 6-12 dm. high, from a somewhat woody base, 
simple or sparingly branched, striate, arachnoid with long loose 
hairs: leaves scattered, lanceolate, acuminate, sessile, smooth 
above, arachnoid beneath, entire or the lower irregularly laciniate- 
lobed with 3-4 divergent acuminate lobes : infloresence paniculate, 
subsecund, with slender branches 3-10 cm. long, upon which are 
scattered the short pedicellate heads: heads borne singly or in 
pairs, subtended by minute bracts : involucre broadly campanulate, 
the bracts slightly arachnoid, becoming smooth, scarious with a 
green center: flowers all fertile, light yellow, brownish in drying : 
receptacle glabrous. 
This species is nearest to Artemisia elatior (T. & G.) Rydb. 
The subsecund loose inflorescence and peculiar involucral bracts 
are characteristic. It was collected on the sandy banks of the 
Columbia River, one mile west of Vancouver, Washington, Aug. 
31, 1902, no. 11284. 
v Agoseris maritima Sheldon sp. nov. 
Perennial from a simple or rarely branched: caudex which is 
buried in the sand,and emits an orange yellow juice when bruised : 
leaves clustered at the top of the caudex 0.75-1 dm. long 
spatulate, mucronate, remotely dentate, sparsely short-pubescent, 
becoming glabrate, the narrowly margined petioles slightly en- 
larged and scarious at the base: peduncles as long as the leaves 
when in flower, twice as long when in fruit, striate near the top 
slightly pubescent with loose hairs: involucral bracts green, 
