1915] 



GREENMAN — MONOGRAPH OF SENECIO 605 



Annual or biennial, glabrous or slightly white tomentulose 

 in the axils of the leaves ; stem 1.5 to 5 dm. high, striate ; leaves 

 usually pinnately divided into cuneate to reniform dentate 

 or crenate-dentate divisions, the terminal division ovate-reni- 

 form, 1 to 5 cm. broad; basal and lower stem-leaves petio- 

 late and occasionally undivided ; upper stem-leaves sessile and 

 amplexicaul; inflorescence a terminal few to several-headed 

 corymbose cyme; heads radiate; involucre campanulate, 

 barely calyculate; bracts of the involucre usually 13 (rarely 

 16), lanceolate, 6 to 6.5 mm. long, glabrous; ray-flowers 8 to 

 10; disk-flowers 30 to 50; achenes ribbed, glabrous. 



Distribution: mountains of New Mexico. 

 Specimens examined: 



New Mexico : Willow Gulch, Colfax Co., alt. 3050 m., Aug., 



1896, St. John 115 ( Gray Herb. ) ; Santa Fe Canon, 7 July, 



1897, alt. 2440 m, A. A. & E. G. Heller 3820 (Mo. Bot. Gard. 

 Herb.), co-type; Santa Fe Creek, 22 June, 1847, Fendler 438 

 (Mo. Bot. Gard. Herb.) ; White Mountains, Lincoln Co., alt. 



3048 m, 16 Aug., 1897, Wooton 494 (Mo. Bot. Gard. Herb.) 

 mouth of Pouchuelo Creek, Pecos River National Forest, alt 

 2590 m., 30 June, 1908, Standley 4093 (Mo. Bot. Gard. Herb.) 

 mouth of Mora River, Pecos River National Forest, alt 

 2470 m., 7 July, 1908, Standley 4250 (Mo. Bot. Gard. Herb.) 

 Pecos River Indian Reservation, 17 July, 1898, Coghill 71 

 (Mo. Bot. Gard. Herb.). 



18. S. glabellus Poir, Diet. 7 : 102. 1806 ; Greenm. Monogr. 

 Senecio, I. Teil, 23. 1901, and in Engl. Bot. Jahrb. 32 : 19. 

 1902 ; Gray, Manual, 853, ed. 7, 1907 ; Britton & Brown, 111. Fl. 

 3 : 540, ed. 2, 1913. 



S. lyratus Michx. Fl. Bor. Am. 2 : 120. 1803, not L. 



S. lobatus Pers. Syn. 2 : 436. 1807 ; Nutt. Gen. 2 : 165. 1818 ; 

 Elliot, Sk. 2 : 332. 1824 ; Torr. & Gray, Fl. N. Am. 2 : 437. 



1843 ; Gray, Syn. Fl. N. Am. I 2 : 394. 1884, and ed. 2, 1886, 



mainly ; Chapman, Fl. Southern U. S. 266, ed. 3, 1897 ; Britton 

 & Brown, 111. FL 3 : 481, ed. 1, 1898 ; Small, Fl. Southeastern 

 U. S.. 1303. 1903, and ed. 2, 1913; Mohr, Contr. U. S. Nat. 

 Herb. 6 : 815. 1901. 



