472 COMPOSITAE. 



1. E. canadensis h. BORSEWEED. Stems erect, paniculately branching 

 above t lu> simple base, 2 to 5 ft. high; herbage hispid with scattered hairs or 

 oearly glabrous, especially above; leaves linear to lanceolate, the lowest spat- 

 ulate or narrowed to :i petiole, 2 to 3 in. long; heads small (iy 2 to 2 lines 

 high), very numerous in a dense panicle; rays vrery shorl and inconspicuous, 

 white. 2 toothed. 



A widely distributed naturalized weed very common in waste or half-culti- 

 vated Lands, in late summer or autumn. 



2. E. glaucus Kor. Seaside Daisy. Flowering stems erect, 4 to 8 (or 10) 

 in. high, commonly one-headed, arising from a radical tuft of leaves crowning 

 the fleshy caudex and often, also, from rosulate offsets terminating prostrate 

 woody branches; stems pilose-pubescent, leaves finely puberulent, heads some- 

 what tomentose; leaves spatulate, obovate, entire, rarely with a small tooth 

 on cither side below the apex, 1 to 4 in. long; upper cauline small and scat- 

 tered; heads large, 1% in. in diameter including the numerous rather broad 

 lilac and violet rays. 



Common on cliffs or sandy shores, near the sea only: San Francisco south 

 to Santa Barbara and north to Oregon. July-Aug. 



3. E. philadelphicus L. Skevish. Stems simple, 2 to 3 ft. high, branched 

 only at or near the summit ; herbage hispidly pubescent ; leaves spatulate or 

 obovate, serrate or coarsely few-toothed, the radical (including the long mar- 

 gined petioles) 5 to 11 in. long, the cauline with auriculate clasping base, 3 

 in. long, more or less; heads corymbose, commonly on rather long peduncles, 

 y 2 to 1 in. in diameter; rays white or pink, numerous, narrow. 



Along streamlets and by springy places in the hills and valleys : Coast 

 Eanges and Sierra Nevada. Apr.-May. 



4. E. foliosus Nutt. Stems many from the base, erect, simple, corymbosely 

 branching above, 1 to 1% ft. high; leaves crowded on the stems, conspicuously 

 reduced only on the branches of the inflorescence, scabrous-hispidulous, linear 

 or lanceolate, % to 1*4 in. long, 1 to 2 lines wide; heads rather few in an 

 open terminal corymb, hemispherical, 10 to 11 lines broad, including the violet 

 rays; rays about 30 to 40, 1 line wide; pappus coarse and rather short. 



Common in the hill country: Marin Co. to the San Francisco Peninsula, Mt. 

 Diablo and southward to Southern California. June-Aug. 



5. E. setchellii Jepson. Stems smooth, 1 * i to 2 ft. high: herbage bright 

 green, very brittle; leaves filiform, less than 1 in. long, muriculate-scabrous; 

 heads hemispherical, 4 lines high, disposed in a rather broad proliferous 

 corymb with a few subulate bracts at base; involucre inconspicuous, the subulate 

 or lanceolate bracts unequal, the outer rough-hispid; rays light blue, about 

 25, filiform, 2 lines long; achenes glabrous. 



Arid plains of the lower San Joaquin. 



6. E. supplex Gray. Stems decumbent or ascending 4 to 8 in, high, termi- 

 nated by a single broad short-peduncled head 4 to 6 lines high; heritage 

 sparingly hirsute-pubescent or almost glabrous, the involucre canescently 

 hirsute; leaves oblong-spatulate to linear-lanceolate, 1 to 2 in. long; bracts of 

 involucre equal, Linear lanceolati . 



North coast, rarely collected and apparently maritime: Gualala, Sonoma 

 Co.; Mendocino City. 



7. E. angustatus Greene. Stems several or many from a woody crown. 

 1.1 to L8 in. high; herbage glabrous throughout; leaves narrowly linear or 

 filiform; heads solitary or in a Corymbose panicle, subtended by a few subulate 



