COMPOSITAE. 363 



Dry prairies, Clarke County, Washington, and southwards. Common 

 in the Willamette Valley. 



Grindelia oregana Gray. (G. stricta DC. ?) Glabrous or nearly so and 

 more or less varnished; stems stout, often tufted, 60-90 cm. high; leaves 

 subcoriaceous, oblong-spatulate or the upper lanceolate, mostly acute, entire 

 to sharply denticulate, 6-10 cm. long, the cauline sessile by a narrowed base, 

 the radical petioled; involucre gummy, 10-15 mm. high; tegules subulate; 

 ray-flowers 12-20 mm. long; akenes truncate; pappus awns 2 or 3. 



Common on high sea beaches; G. hendersoni Greene is apparently a mere 

 form. 



Grindelia oregana wilkesiana Piper n. subsp. Sparsely pubescent through- 

 out with weak white hairs; otherwise like G. oregana. 



Gray Harbor, Wilkes Expedition; Nisqually, Wilkes Expedition; Fraser 

 River, Dr. Holmes; Queen Charlotte Islands, Osgood. 



502. CHRYSOPSIS. 



Low herbs; leaves numerous, alternate, sessile; heads solitary 

 or in corymbs with yellow flowers; ray-flowers fertile or sometimes 

 wanting; tegules narrow, acute, scarious-margined ; receptacle 

 flat; style-branches with appendages; pappus double, of two 

 kinds, the interior of long copious capillary bristles, the exterior 

 of short bristles or chaffy scales; akenes oblong-linear or ovate- 

 oblong, compressed, hairy. 



Ray-flowers none; leaves green, hispid-hirsute. C. oregana. 



Ray-flowers present; leaves canescent, strigose or hirsute. C. villosa. 



Chrysopsis oregana (Nutt.) Gray. Herbage hispid-hirsute; stems tufted, 

 20-30 cm. high, mostly branched; leaves oblong to lanceolate, entire, acute, 

 sessile, 3-5 cm. long; inflorescence corymbose-paniculate, glandular; involucre 

 campanulate; tegules thin, linear to lanceolate, 1-nerved, in several series; 

 akenes oblong; pappus white, capillary. 



On gravel bars of streams, Washington to California. 



Chrysopsis villosa (Pursh) Nutt. Perennial, the stems decumbent or 

 suberect, 15-30 cm. long, canescent throughout and more or less villous; 

 leaves numerous, oblong or oblanceolate, mostly acute, sessile or nearly so, 

 2-3 cm. long; heads solitary or corymbed, terminating short leafy branches; 

 involucre hemispherical, 10-15 mm. broad; tegules canescent or nearly glabrous; 

 ray-flowers golden-yellow; akenes obovate, pubescent; outer pappus very 

 short. 



Rare west of the Cascade Mountains; Coupeville, Washington, Gardner. 



503. HOOREBEKIA. 



Herbs or low undershrubs; leaves alternate, soft or rigid; heads 

 solitary, terminal, or clustered, many-flowered; ray-flowers fertile 

 or rarely none; involucre imbricated; tegules with or without 

 foliaceous tips; receptacle flat or flattish; pappus tawny or 

 reddish, of copious and unequal capillary bristles, somewhat 

 rigid; style-branches with appendages; akenes turbinate and 

 linear, terete, angled or more or less compressed. 



