368 COMPOSITAE. 



solitary; involucre very woolly; tegules linear-lanceolate, acute; ray-flowers 

 purple, numerous, 6-8 mm. long. 



Cascade Mountains, without exact locality, Dr. Cooper. 



Erigeronpacificus Howell. Perennial from a woody rootstock, thinly canes- 

 cent, hirsutulous throughout; stems leafy, erect or ascending, 5-10 cm. high; 

 basal leaves linear-lanceolate, acute, petioled, 2-5 cm. high, thinly pubescent 

 with short stiff white hairs on both sides; cauline similar but smaller and short 

 petioled; involucre hemispheric, 1 cm. broad; tegules linear-oblong, acute, 

 4-5 mm. long, thinly hirsutulous; ray-flowers 20-40, blue to purple, 10-12 

 mm. long; akenes minutely pubescent; pappus double, the outer bristles very 

 short, the inner equalling the disk-flowers. 



On grassy slopes near Table Rock, Clackamas County, Oregon, Howell; 

 not otherwise known. 



Erigeron glaucus Ker. Somewhat viscid pubescent; stems 20-30 cm. 

 high; leaves mostly in a basal tuft, pale green, hardly glaucous, somewhat 

 fleshy, obovate or spatulate, entire or nearly so, 6-10 cm. long; cauline spatu- 

 late-oblong, obtuse, sessile; heads mostly solitary, large, the disk 2.5 cm. 

 broad; involucre loose, villous with long hairs; ray-flowers 60-100, violet, 

 broad, 10-12 mm. long. 



Along the seashore of Oregon and California. 



Erigeron oreganus Gray. Perennial, pubescent; stems spreading or as- 

 cending, 15-30 cm. long; leaves mostly in a basal rosette, cuneate-obovate, 

 coarsely dentate or incised, 3-8 cm. long; cauline spatulate, subentire, smaller; 

 heads solitary or few; involucre 8-10 mm. high; tegules linear, acuminate, the 

 outer loose and passing into the leaves; ray-flowers 60-70, pink, 10-12 mm. 

 long; pappus simple. 



On perpendicular cliffs in the gorge of the Columbia River; not elsewhere 

 known. 



Erigeron spatulifolius Howell. Perennial from a very stout caudex, green 

 and nearly glabrous; stems usually several, slender, sparsely hirsute, erect or 

 ascending, 10-20 cm. high; basal leaves spatulate to oblanceolate, broadly 

 obtuse, entire or with a few crenate teeth near the apex, glabrous on both 

 sides, 2-i cm. long, including the margined petiole; cauline leaves oblong or 

 ovate-oblong, acute, sessile, small, about 1 cm. long; involucre hemispherical, 

 1 cm. broad; tegules broadly linear, attenuate-acute, minutely granular; ray- 

 flowers 30—10, purple ; pappus bristles as long as the disk-flowers ; akenes smooth. 



On rocky banks, Pansy Camp, Cascade Mountains, Oregon, Howell. 



Erigeron leibergii Piper. Perennial from a stout caudex, sparsely hirsute 

 and glandular throughout; flowering stems 10-15 cm. high, mostly simple 

 and bearing a single head; basal leaves broad, spatulate to oblanceolate, obtuse, 

 entire, ciliate, 4-9 cm. long; cauline oblong, sessile, mostly acute, 1-2 cm. long; 

 involucre viscid glandular and sparsely hirsute; tegules linear, acuminate; 

 ray-flowers 20-25, violet, 1 cm. long. 



Mount Stuart, Leiberg; Bear Creek, Okanogan County, Washington, 

 Gorman; 25-mile Creek, Okanogan County, Gorman. E. leibergii differs 

 from E. spatulifolius only in the herbage and involucre being somewhat pilose. 

 It is not unlikely that the two constitute but one species, variable as to pubes- 

 cence. 



Erigeron speciosus DC. (E. glabellus mucronatus Hook.) Perennial 

 tufted, sparingly hirsute or nearly glabrous; stems 30-50 cm. high, leafy to 

 the top, erect; leaves lanceolate, entire, acute or acuminate, usually ciliate at 

 least at the base, the upper cauline sessile by a broad base, the lower and rad- 

 ical petioled, 5-15 cm. long; heads few, in a loose corymb; involucre hirsute or 



