1917] 
GREENMAN— MONOGRAPH OF SENECIO 33 
95. 8. Austinae Greene, Bull. Calif. Acad. Sci. 1: 93. 1885; 
Greenm. Monogr. Senecio, I. Teil, 24. 1901, and in Engl. Bot. 
Jahrb. 32: 20. 1902. 
S. Neo-Mexicanus Gray, Syn. Fl. N. Am. 12: 454. 1885, not 
Gray, Proc. Am. Acad. 19: 55. 1883. | 
An herbaceous perennial; stem simple, erect, 3 to 4 dm. 
high, nearly naked above, striate, glabrous; lower leaves petio- 
late, oblong-oblanceolate, 2 to 8 em. long, .5 to 1.5 cm. broad, 
sharply and unequally callous-mucronate-dentate, thickish in 
texture, inconspicuously tomentulose to glabrous; uppermost 
leaves reduced to entire bracts; inflorescence a terminal few- 
headed corymbose cyme; heads 10 to 12 mm. high, radiate; 
involucre campanulate, sparingly calyculate; bracts of the 
involucre about 21, linear-lanceolate, acute, 7 to 8 mm. long, 
glabrous; ray-flowers 8 to 10, rays light yellow; disk-flowers 
numerous; achenes glabrous. 
Distribution: northeastern California. 
Specimens examined: 
California: Alturas, Modoc Co., July, 1884, Mrs. R. M. 
Austin (Greene Herb., Univ. of Notre Dame, and Gray Herb.). 
The specimen in the Gray Herbarium, although incompletely 
labeled, is taken to be a part of the original material on which 
the species was founded. 
This species is closely related to S. eurycephalus Torr. & 
Gray, but it differs in having the upper portion of the stem 
nearly naked, and in having merely laciniate-toothed leaves 
without the deep rounded sinuses which are characteristic of 
the Torrey and Gray species. 
96. 8. ionophyllus Greene, Pittonia 2: 20. 1889; Fl. Fran- 
ciscana, 472. 1897; Greenm. Monogr. Senecio, I. Teil, 24. 1901, 
and in Engl. Bot. Jahrb. 32: 20. 1902; Hall, Univ. Calif. Pub. 
Bot. 3: 231. 1907. 
An herbaceous perennial; stems one to several from a com- 
mon base, 2 to 3.5 dm. high, simple or branched, leafy at the 
base, sparingly leafy above; lower leaves including the long 
slender petiole 2.5 to 8 сш. long, .5 to 2 em. broad, obovate- 
