1918] 
GREENMAN—MONOGRAPH OF SENECIO 45 
dentate, abruptly to gradually contracted below the middle 
into a narrowly winged petiole, at first densely white-tomen- 
tose, later glabrate, thickish in texture and often more or less 
tinged with purple; upper stem-leaves much reduced, sessile, 
oblanceolate to linear and bracteiform; inflorescence a termi- 
nal corymbose few to several-headed cyme; heads 10 to 12 mm. 
high, radiate; involucre campanulate, sparingly calyculate, 
tomentulose to nearly glabrous; bracts of the involucre about 
21, linear-lanceolate, 6 to 8 mm. long; ray-flowers 13, rays yel- 
low; disk-flowers numerous, 50 to 70; achenes glabrous. 
Distribution: northern Mexico. 
Specimens examined: 
Chihuahua: Puerta de St. Diego, alt. 1980 m., 12 April, 1891, 
C. V. Hartman 623 (Gray Herb. and U. S. Nat. Herb.), TYPE. 
Sonora: Guadalupe Cañon, E. K. Smith (Gray Herb. and 
Field Mus. Herb. No. 42927) ; without definite locality, coll. of 
1890, C. E. Lloyd 405 (Gray Herb.). 
102. 8. bernardinus Greene, Pittonia З : 298. 1898; Greenm. 
Monogr. Senecio, I. Teil, 24. 1901, and in Engl. Bot. Jahrb. 
32 : 20. 1902 
S. тонер Ийне var. bernardinus Hall, Univ. Calif. Pub. Bot. 
3 : 232. 1907. 
S. neo-mexicanus Gray, Proc. Am. Acad. 19: 55. 1883; Syn. 
Fl. N. Am. 1?: 392. 1884, and ed. 2, 1886, in part, as to plant of 
Parish. 
An herbaceous perennial, at first floccose - tomentose 
throughout, more or less glabrate; stems one to several, 1.5 to 
3 dm. high, simple or branched; leaves mostly basal, usually 
numerous, often forming a rather dense rosette, round-ovate, 
obovate to spatulate-cuneate, 2 to 6 em. long, .5 to 1.5 em. 
broad, thiek in texture, entire or dentate towards the apex, 
narrowed at the base into a slender petiole much exceeding 
the blade, and occasionally bearing a pair of small lobes at the 
base of the blade, the older persistent leaves becoming nearly 
or quite glabrous; upper stem-leaves few, more or less re- 
duced, narrowly cuneate and dentate towards the apex to 
linear-lanceolate and entire; inflorescence a terminal few to 
