COMPOSITAE. 383 



Petasites frigida (L.) Fries. (P. nivalis Greene.) Flowering stems 10-20 

 cm. high; leaves cordate-ovate or reniform-hastate in outline, 5-7-lobed with 

 broad sinuses, 5-10 cm. long, green above, white tomentose beneath; lobes 

 entire or with a few teeth. 



Along alpine rivulets in the Olympic Mountains and in the Cascade Moun- 

 tains from Mount Rainier northward. 



Petasites speciosa (Nutt.) Piper. Flowers blooming before the leaves 

 appear; stems 15-40 cm. high, covered with scaly reduced leaves; foliage 

 leaves reniform-orbicular, very large, 15-50 cm. broad, 7-9-lobed beyond the 

 middle, green and glabrous above, densely white tomentose beneath; lobes 

 oblong, coarsely dentate; flowers lavender-colored, with the odor of violets. 



Common on moist bluffs. It has been confused with the eastern P. pal- 

 mata (Ait.) Gray. 



535. LUINA. 



Perennial herbs with alternate entire sessile leaves; heads 

 corymbose, each about 10-flowered; involucre campanulate; 

 tegules 8-10, firm, carinate, arranged in a single series; receptacle 

 flat, naked; corollas all alike, cream-colored, deeply 5-cleft; 

 anthers sagittate at base ; style branches linear, flattened, trun- 

 cate; akenes 10-striate; pappus of soft white capillary bristles. 



Luina hypoleuca Benth. White tomentose, except the upper surface of the 

 leaves; stems tufted, 20-30 cm. high, erect, leafy and simple to the inflores- 

 cence; leaves ovate or elliptical, obtuse, firm, shiny-green above, 2-3 cm. long; 

 heads corymbose; involucre 8 mm. high; flowers cream-colored. 



Common on rock cliffs and gravel bars in the mountains, at 1000-2000 m. 

 altitude. First collected by Lyall at Lake Chilukweyuk, near the 49th 

 parallel. 



536. RAINIERA. 



Perennial herb with alternate sessile entire leaves and numer- 

 ous heads in a panicle; heads 4-7-flowered; involucre cylindric, 

 with 4-7 firm carinate tegules in a single series; receptacle flat, 

 naked ; corollas all tubular, pale yellow, deeply 5-cleft ; anthers not 

 sagittate at base; style branches linear, truncate; akenes gla- 

 brous, prismatic ; pappus capillary, copious, pale-tawny. Scarcely 

 distinct from Luina. 



Rainiera stricta Greene. {Luina piperi Robinson.) Glabrous or nearly 

 so; stems stout, erect, leafy, 60-90 cm. high; leaves oblong-lanceolate, petioled, 

 15-30 cm. long, the cauline sessile or nearly so and smaller; heads 5-6-flowered, 

 numerous, in an erect raceme, 15-30 cm. long; involucre cylindric; tegules 

 5-7, linear or oblong, acute; flowers pale yellow; pappus tawny. 



Alpine meadows on and about Mount Rainier. 



537. CROCIDIUM. 



Small annual herbs with alternate leaves; heads solitary, 

 terminal, small, radiate, the flowers all fertile; involucre hemi- 

 spheric, of 8—12 thin herbaceous tegules in one row; ray-flowers 

 about 12, yellow; disk-flowers more numerous, yellow; style 

 branches short and broad with large appendages; pappus of one 



