DEC. 1907. SPERMATOPHYTES FROM MEXICO GREENMAN. 275 



5295 (hb. Field Mus.), type; south side of the volcano of Santa 

 Maria, altitude 1370 m. ( 19 January, 1907, W. A. Kellerman, 

 no. 6114 (hb. Field Mus.). The affinity of this species is with 

 Schistocarpha paniculata Klatt, from which, however, it differs 

 in having a more sparse tomentum on stem and foliage, larger 

 leaves, smaller heads with fewer flowers, and also in the shorter 

 broader pales. 



Senecio (Erexnophili) durangensis Greenman, nom. nov. 5. 

 ctenophyllus Greenm. Proc. Am. Acad. xliii. 20 (1907), not Phil. 



Senecio ( Sanguisorboidei) coahuilensis Greenm. 



An herbaceous perennial, glabrous or essentially so through- 

 out: stem erect, 3 to 4 dm. high, branched, striate: leaves 

 pinnatifid, 5 to 10 cm. long, 2 to 3 cm. broad, thickish in texture 

 and slightly glaucous, glabrous on both surfaces or puberulent 

 beneath; segments obtusely crenate-dentate, the terminal 

 segment largest and subreniform, the lateral ones obovate; the 

 lowermost leaves petiolate, the upper stem-leaves sessile and 

 amplexicaul: inflorescence terminating the stem and branches 

 in a compound corymbose cyme: heads about 7 mm. high, 

 radiate: involucre campanulate, calyculate with 2 or 3 small 

 bracteoles, glabrous; bracts of the involucre 13 (-15), linear- 

 lanceolate, 4 to 5 mm. long: ray-flowers 8 to 10; rays oblong, 

 3 to 4 mm. long, 4-nerved: disk-flowers 35 to 40: achenes gla- 

 brous, striate. Monogr. Senecio, I Th. 23 (1901) & in Engl. Bot. 

 Jahrb. xxxii. 19 (1902), without complete description. MEXICO. 

 State of Coahuila: Lerios, February to October, 1880, Dr. 

 Edward Palmer, no. 755 (hb. Gray, and hb. Kew). This species 

 has been confused with 5. Sanguisorbce DC., but it is amply 

 distinct in habit, size and foliar characters. 



Senecio ( Sanguisorboidei) Ervendbergii Greenm. 



Glabrous throughout: stem herbaceous, leafy, striate: upper 

 stem-leaves thin, membranous, sublyrately pinnatifid, sessile, 

 more or less expanded and subamplexicaul at the base ; segments 

 7 to 9, sublaciniate, the ultimate divisions usually 3-toothed and 

 the teeth tipped by a short mucro; terminal segment obovate- 

 rotund, the lateral oblong or somewhat obovate-oblong; midrib 

 more or less winged throughout and often bearing small tooth- 

 like expansions between the main segments; inflorescence a 

 terminal compound corymbose cyme: heads small about 5 mm. 

 high, on slender pedicels: involucre campanulate, ecalyculate; 

 bracts of the involucre about 2 1 , slightly shorter than the flowers 

 of the disk: ray-flowers 12 to 14: disk-flowers 75 to 80: achenes 

 hispidulous. Monogr. Senecio, I Th. 23 (1901) & in Engl. Bot. 

 Jahrb. xxxii. 19 (1902) without complete characterization. 

 MEXICO. State of Vera Cruz: Wartemberg, near Tantoyuca, 

 province of Huasteca, October, 1858, C. L. Ervendberg, no. 90 

 (hb. Gray). Nearly related to 5. tampicanus DC. 



