1916] 
GREENMAN—MONOGRAPH OF SENECIO 141 
Socorro Co., 8 Aug., 1900, Wooton (U. S. Nat. Herb.) ; Santa 
Magdalena Mountains, June, 1881, Vasey (U. S. Nat. Herb.). 
60. 8. platylobus Rydb. Bull. Torr. Bot. Club 27:181, 
pl. 6, fig. 8. 1900. 
An herbaceous perennial, glabrous or essentially so; stems 
erect, 2.5 to 4 dm. high, striate; lower leaves petiolate, obovate 
or broadly oval, including the petiole 3.5 to 14 em. long, 1 to 
3 cm. broad, irregularly dentate; stem-leaves petiolate and 
sublyrate to sessile and pinnately divided into oblong to 
cuneate, rather conspicuous, rounded or acute lateral divi- 
sions; inflorescence a many-headed corymbose cyme; heads 8 
to 10 mm. high, radiate; involuere campanulate, sparingly 
calyculate; bracts of the involucre 13 to 21, lanceolate, acute, 
5 to 6 mm. long, glabrous, somewhat stramineous; ray-flowers 
10 to 12, rays yellow; disk-flowers numerous; achenes gla- 
brous. 
Distribution: mountains of Utah. 
Specimens examined: 
Utah: Wasatch Mountains, coll. of 1869, Watson 671 
(Torrey Herb.), түре; cation bottoms, Provo, Wasatch Moun- 
tains, 16 June, 1902, Goodding 1115 (Mo. Bot. Gard. Herb.) ; 
Red Rock Cañon, near Salt Lake City, 11 June, 1905, Rydberg 
6064 (U. S. Nat. Herb.) ; rich woods in mountain cañon, Arm- 
strong 336 (Margaret Armstrong Herb.); Mendon, 17 June, 
1898, Mulford 124 (Mo. Bot. Gard. Herb.). 
There appears to have been some confusion of the material 
which was distributed by Dr. Watson under his number 671. 
The specimen in the United States National Herbarium agrees 
very well partieularly in habit and foliar characters, with 
typical forms of S. crocatus, but it differs markedly from Wat- 
son's 671 in the Gray Herbarium (which is apparently S. 
rubricaulis Greene) and likewise from the specimen bearing 
the same number in the Torrey Herbarium, namely the type 
of S. platylobus Rydb. 
61. 8. crocatus Rydb. Bull. Torr. Bot. Club 24:299. 1897; 
ibid. 27:177. 1900, in part; Mem. N. Y. Bot. Gard. 1:446. 1900, 
at least as to synonymy; Fl. Colo. 396. 1906, in part; Greene, 
