366. ~ GOMPOSITZ ARTEMISIA 
less toothed: heads about 134 lines broad, not drooping, sessile and very 
numerous. River banksand yards, Brit. Columbia to California Texas and 
Hudson Bay. 
A. Richardsoniana Bess. Supple. 64, & DC. Prodr. vi, 117. Stems 
rather slender, 8-12 inches bigh, from a cespitose perennial caudex: leaves 
silvery-canescent with fine very close-pressed pubescence; radical twice 
ternately or quinately divided or parted into oblong-linear or narrower 
~~ 
lobes of 2-3 linesin length; cauline few, mostly trifid: heads 2 lines high, - — : 
several or rather numerous in a strict simple racemiform inflorescence, 
fuscous: corollas pilose or sometimes glabrous. On Mount Rainier Wash- 
ington to the Arctic coast and the northern Rocky Mountains. 
A. Ludoviciana Nutt. Gen. ii, 143 Canescently tomentose throughout, 
or the upper face of the leaves sometimes early glabrate and green: stems 
1-4 feet high, simple or with virgate branches: leaves lanceolate to oblong, 
mucronate, remotely serrate or 2-3 cleft, or irregularly 3-5-parted into lan- 
ceolate or linear entire lobes; the upper entire: heads gl :merately panicu- 
late, not over 2 lines high; involucre campanulate, or in fruit ovoid, 12-20- 
flowered, lanate-tomentose. Common on plains and banks, Brit. Colum- 
bia to California. 
A. heterophylla Nutt. Trans. Am, Phil. Soc vii, 400. A. vulgaris var. 
Californica Bess. Stems erect, 3-5 feet high, leafy to the top, simpie: 
leaves lanceolate or broader, 2-4 inches long, white beneath with cottony 
tomentum, entire, or often laciniately toothed or cleft: heads numerous, 
in a short and dense naked panicle, 2 lines high, glabrate. On moist banks 
along the coast, Alaska to California. 
A. discolor Dougl. in Herb. Hook. Bess. DC. Prodr. vi, 109. Stems 
mostly slender, 9-12 inches high, from a slender lignescent caudex: leaves 
1-2-pinnately parted into narrow, linear or lanceolate entire or sparingly 
laciniate divisions and lobes, white beneath with close cottony tomentum, 
glabrate above: heads glomerate in an interrupted spiciform or virgate pan- 
icle, 1-2 lines high; involucre hemispherical-campanulate, greenish and 
scarious, glabrous or soon becoming so, 20-30-flowered. Mountains of 
Brit. Columbia to Washington and Montana. 
A. incompta Nutt. 1.c. Stems rather slender, 1-2 feet high: leaves 
once or twice pinnately parted into broadlv to narrowly linear lobes, green 
and glabrate above, pale and slightly t mentose beneath: heads about 2 
lines high, in narrow spicate clusters on the upper parts of the stem and 
branches; bracts of the campanulate involucre ovate, scarious-margined, 
ped glabrous. Mountains of Washington to California and the Rocky 
ountains. 
A. Lindleyana Bess. Abrot. 35. ‘‘ A foot or two, rarely only a span 
higb, slender, with thin flocculent tomentum soon deciduous, or persisting 
on the lower face of the mostly entire leaves (these inch or less long, a line 
or much less wide, the lower occasionally with 2 or 3 small lobes): heads 
barely 2 lines high, loosely spicate on the simple stem or paniculate bran- 
ches of the infloresvence: involucre sparingly pubescent or glabrate, pale 
fuscous. Sandy banks ot the Columbia River and its tributaries.” 
A. Prescottiana Bess. l.c. 72. ‘ Much branched from the base, a foot 
or two high, slender, glabrous or early glabrate : lower leaves cuneate-linear 
and incised or cleft at apex, slightly tomentose beneath; most of the cau- 
line pinnately parted into 5 to 7 delicate filiform divisions (of an inch or 
less long): involuere glabrous, hemispherical, about 15-flowered. Quick- 
sand River near the Grand Rapids of the Columbia Douglas. ”’ 
§ 3 SerrpHrpium Bess. Bull. Soc. Nat. Mose. vii, 5. Low 
shrubs or fruticulose plants. Canescent or silvery with very fine 
