230 University of California Publications in Botany. [VOL. 3 



2. S. triangularis Hook., Fl. Bor. Am. i. 332, t. 115 (1834). 

 S. trigonophyllus Greene, Pitt. iii. 106 (1896). 



Erect, 1 or 2 m. high, simple and leafy up to the loose terminal 

 cyme: herbage glabrous: leaves thin (usually drying black under 

 pressure), triangular-lanceolate, acute, 1 to 1.5 dm. long, 2 to 5 

 cm. broad at the truncate or cordate base, short-petiolate, shal- 

 lowly sinuate-dentate or sometimes with salient sharp teeth; 

 uppermost leaves smaller, narrow, with tapering base, some of 

 them entire: involucre narrowly campanulate, 6 mm. high, with 

 several calyculate bracts at base : rays 6 to 12, deep yellow, 5 to 8 

 mm. long. 



Along streams and in bogs of the Canadian and Hudsonian 

 zones : San Jacinto Mts. at 2400 to 2800 m. alt. ; San Bernardino 

 Mts. at Bluff Lake, 2200 m. alt., and on South Fork of the Santa 

 Ana River at 2500 m. alt. ; more common in the Sierra Nevadas 

 and Rocky Mts., extending north to Saskatchewan. Stems com- 

 monly several or numerous in a close clump, carrying their rather 

 showy clusters of heads above other herbaceous vegetation. Jul.- 

 Sept. 



3. S. serra sanctus Hall, var. nov. 



Root perennial, woody, perpendicular: stems several, herba- 

 ceous, erect, very leafy up to the flowering branches, the whole 

 plant 2 to 3.5 dm. high : herbage completely glabrous except the 

 inflorescence which bears a minute and sparse tomentum : leaves 

 ascending or spreading or even deflexed, often curved, linear, all 

 entire, acute, 4 to 7 cm. long, 1 to 3 mm. wide : heads numerous 

 in a loose terminal leafy-bracted cyme: involucre nearly cylin- 

 dric but slightly narrowed downward, 7 mm. high; bracts 8 or 9, 

 linear, with acute pubescent tips, green, the margins scarious; 

 outer calyculate bracts few or none : rays 5, yellow, about 5 mm. 

 It- ng : disk-flowers 10 to 12 : achenes glabrous. 



Moist north slopes South Fork, Santa Ana River, San Ber- 

 nardino Mts., California, along the lower edge of the Canadian 

 Zone at 2600 m. alt., Hall, no. 7610. Nearest to 8. serra integri- 

 usculus Gray, differing mainly in having all the leaves linear 

 and entire. 



