STANDLEY FLORA OF GLACIER PARK. 437 



first but becoming glabrous and green; heads 1 to 3, woolly, very showy; rays deep" 

 yellow, 1.5 to 2 cm. long. 



3. Senecio canus Hook. Frequent at nearly all altitudes, on open slopes or in 

 low meadows; infrequent above timber line. B. C. to Calif., Colo., and Nebr. — 

 Plants tufted, 20 to 40 cm. high, whitish; leaves at base of stem rounded to oblong, 

 long-stalked, the stem leaves usually lobed, sessile; heads numerous, 10 to 12 mm. 

 high, nearly glabrous; rays bright yellow. 



4. Senecio purshianus Nutt. Occasional at low altitudes on the east slope, in dry 

 rocky soil. B. C. to Sask., Tex., and Utah. — Plants tufted, 10 to 25 cm. high, similar 

 in appearance to i?. canus; heads few, mostlj'' 7 to 8 mm. high. 



5. Senecio triangularis Hook. Tall ragwort. Common nearly everywhere 

 except at the highest altitudes, most abundant at middle elevations and just above 

 timber line; in moist or wet woods or thickets or on moist open slopes. Alaska to 

 Calif., N. Mex., and Sask. {S. saliens Rydb.) — Stems erect, often clustered, 0.2 to 1.5 

 meters high, glabrous; stems very leafy; leaves 3 to 20 cm. long, stalked, coarsely 

 toothed; heads few or numerous, 6 to 10 mm. high; rays bright yellow. 



Senecio saliens is a low form with thick and somewhat fleshy leaves; it is common- 

 above timber line, often growing with the typical form and grading insensibly into 

 it. The plants are showy, but they do not remain long in flower. 



6. Senecio fremontii Torr. & Gray. Abundant on rocky slides and open slopes 

 above timber line; occasional on open rocky slopes at middle altitudes. B. C. to 

 Oreg., Wyo., and Mont. — Plants usually forming dense bushy clumps 10 to 15 cm. 

 high, glabrous; leaves rounded to obovate, 1.5 to 3 cm. long, coarsely toothed, fleshy, 

 sessile, or short-stalked; heads 8 mm. high, 1 or few on each stem; rays bright yellow. 



One of the handsomest and most conspicuous plants of alpine slopes. 



7. Senecio conterminus Greenm. Frequent on the highest rock slides and on 

 exposed rocky summits. Mont., B. C, and Alta. — Plants solitary or in small tufts, 

 somewhat woolly, especially at first; basal leaves long-stalked, rounded, 1 to 1.5 cm- 

 long, with few low teeth; head 8 to 10 mm. high; bracts usually purplish; rays bright 

 yellow. 



The species has not been reported previously from Montana. 



8. Senecio ovinus Greene. Common above timber line, in wet meadows and on 

 rocky slopes. Alta. and B. C. to Wyo. — Plants often tufted or matted, glabrous, 

 5 to 15 cm. high; basal leaves rounded, long-stalked, 1 to 2 cm. long, with few low 

 teeth; heads 7 to 8 mm. high; rays bright yellow. 



A handsome and often conspicuous little plant. 



9. Senecio hydrophiloides Rydb. Frequent at low altitudes on the east slope, in 

 marshes, low meadows, or wet thickets; on wet slope at Iceberg Lake. B. C. and 

 Wash, to Mont. — Plants solitary, 50 to 90 cm. high, somewhat woolly when young 

 but becoming glabrous; basal leaves long-stalked, oblanceolate or nearly ovate, with 

 fine spreading teeth, somewhat fleshy; heads about 1 cm. high, narrow. 



10. Senecio cymbalarioides Nutt. Open slopes at Cracker Lake; also at the east 

 entrance and Duck Lake. B. C. and Mack, to N. Mex. — Plants 20 to 30 cm. high, 

 nearly glabrous; basal leaves with few low teeth; heads several, 7 to 9 mm. high. 



11. Senecio pseudaureus Rydb. Low thickets at east entrance; common. B. C. 

 to Sask., N. Mex., and Calif. — Plants 30 to 60 cm. high, bright green, nearly glabrous; 

 basal leaves long-stalked, obtuse, the stem leaves deeply toothed or lobed; heads 

 8 to 10 mm. high. 



12. Senecio burkei Greenm. Common at low altitudes, in wet woods, thickets, or 

 meadows, along streams, and rarely on open slopes. B.C. and Idaho to Minn . — Plants 

 30 to 80 cm. high, nearly or quite glabrous; leaves bright green, the lower ones on 

 long slender stalks, the upper ones deeply lobed; heads usually few, 10 to 12 mm. 

 high. 



