280 FIELD COLUMBIAN MUSEUM BOTANY, VOL. II. 



at the base; bracts of the involucre subbiseriate, about 21, 

 lanceolate-linear, i cm. long, obtuse or obtusish: flowers numer- 

 ous, about 70: corollas, as well as the bracts of the involucre, 

 often reddish: achenes striate, glabrous.- Monogr. Senecio, 

 I Th. 25 (1901) & in Engl. Bot. Jahrb. xxxii. 21 (1902), without 

 complete characterization. Senecio helodes, Hemsley, Biol. 

 Cent. -Am. Bot. ii. 241 (1881), in part, not Benth. Cacalia race- 

 mosa, Schz. Bip., ace. to Hemsl., 1. c. MEXICO. State of Gua- 

 najuato: Jacal, Ehrenberg, no. 1,293 (hb- Gray, hb. Roy. Bot. 

 Mus. Berlin, and hb. Kew). 



Senecio ( Mulgedifolii) rhyacophilus Greenm. 



Stem herbaceous, glabrous: leaves runcinate-pinnate with 

 rather unequally and irregularly mucronate-dentate or sublobate 

 segments and with rounded sinuses between the segments, gla- 

 brous on both surfaces, paler beneath, thin or membranous in 

 texture, more or less expanded below into a lac.iniate-dentate 

 amplexicaul base, 0.5 to 2 dm. long, i to 6 cm. broad; the upper- 

 most leaves undivided, lance-attenuate from a rather broad 

 base, coarsely toothed: inflorescence a terminal somewhat 

 leafy pubescent panicle: heads 12 to 15 mm. high, discoid, about 

 24-flowered : involucre calyculate with linear-setaceous bracteoles, 

 glabrous; bracts of the involucre usually 13, linear, about i cm. 

 long, acute to obtusish and, as well as the corollas, more or less 

 purplish: achenes striate, glabrous. Monogr. Senecio, I Th. 25 

 (1901) & in Engl. Bot. Jahrb. xxxii. 21 (1902), without complete 

 characterization. GUATEMALA. Department of Zacatepiquez : 

 Volcan Fuego, altitude 2,735 m -> November, 1889. Heyde & 

 Lux, no. 4,502 (hb. Gray), exsiccatas of John Donnell Smith. 

 Department of Quiche: Chiul, altitude 2,400 m., April, 1892, 

 Heyde & Lux, no. 3,379 (hb. Gray), exsiccatas of John Donnell 

 Smith. 



Senecio ( Fruticosi) hirsuticaulis Greenm. 



Shrub: stem above and the branches, as well as the petioles, 

 densely hirsute-pubescent with spreading hairs: leaves petiolate, 

 ovate-oblong, 5 to 8 cm. long, 3 to 6 cm. broad, subcordate, 

 slightly hirtellous above especially on the midrib and lateral 

 nerves, later nearly glabrous, densely and permanently hirsute- 

 tomentose beneath, subangulately 5-7-lobed with broad shallow 

 sinuses, mucronate-denticulate ; lobes conspicuously mucronate- 

 acute; petioles stoutish, about 2 cm. long: inflorescence a ter- 

 minal compound hirsute- tomentose corymb; peduncles seta- 

 ceous-bracteate : heads about i cm. high, radiate: involucre 

 narrowly campanulate, calyculate with setaceous bracteoles; 

 bracts of the involucre usually 13, linear to lance-oblong, acutish, 

 the inner with scarious suberose margins : ray-flowers commonly 

 8; rays yellow, 4-nerved: disk-flowers 20 to 25, exceeding the 

 involucre: achenes glabrous. Monogr. Senecio, I Th. 26 (1901) 

 . & in Engl. Bot. Jahrb. xxxii. 22 (1902), without complete char- 

 acterization. MEXICO. En route from San Luis Potosi to 



