368 COMPOSITAE. 



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

 purple, numerous, 6-8 mm. long. 



Cascade Mountains, without exiict locality, Dr. Cooper. 



Erigeron pacificus Howell. Perennial from a woody rootstock, thinly canes- 

 cent, hirsut ulcus 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; akencs 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 clifTs 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, 2-4 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 30-40, 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 diff^ers 

 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 



