284 FIELD COLUMBIAN MUSEUM BOTANY, VOL. II. 



apiculate; margins cartilaginous-denticulate: inflorescence a 

 . , terminal round-topped many-headed paniculate cyme: heads 

 subcylindrical, 10 to 12 mm. high, radiate: involucre calyculate 

 with bracteoles less than half the length of the 8 oblong-lanceolate 

 obtusish bracts of the involucre: ray-flowers mostly 6: disk- 

 flowers 1 8 to 20, equalling or slightly exceeding the involucre; 

 pappus about as long as the corolla : achenes glabrous. Monogr. 

 Senecio, I Th. 26 (1901) & in Engl. Bot. Jahrb. xxxii. 22 (1902), 

 without complete characterization. MEXICO. State of Vera 

 Cruz: Regla, Ehrenberg, no. 454 (hb. Gray). 



Senecio ( Multinervii) Cooperi Greenm. 



Stout herb ? : stem at least above pubescent with brownish hir- 

 tellous hairs: leaves large, oblong-ovate, including the petiole 

 3 to 3.5 dm. long, i to 1.5 dm. broad, rather blunt or narrowed 

 at the apex, mucronate-acute, merely denticulate on the margins 

 to somewhat sinuate and unequally dentate, the teeth tipped 

 with a cartilaginous mucro, few and irregularly lobed at the 

 base with rounded open sinuses, decurrent on the petiole, spar- 

 ingly puberulent on both surfaces; midrib and the numerous 

 lateral nerves prominent beneath: inflorescence corymbose: 

 heads 1.5 cm. high, radiate: involucre barely calyculate with a 

 few small inconspicuous bracteoles; bracts of the involucre 

 8, linear, acutish, slightly penicillate-tipped, otherwise glabrous: 

 ray-flowers about 8; rays linear-oblong, conspicuous: disk- 

 flowers with a long slender tube and a rather deeply 5 -lobed 

 limb: achenes pubescent. Monogr. Senecio, I Th. 26 (1901) & in 

 Engl. Bot. Jahrb. xxxii. 22 (1902), without complete characteri- 

 zation. COSTA RICA. Province of Cartago: Cartago, altitude 

 1,310 m., December, 1887, Juan J. Cooper, no. 5,803 (hb. Gray), 

 exsiccatae John Donnell Smith, distributed as "Senecio multi- 

 venius Benth."; "la Division, vallde du Ge"ne"ral", altitude 

 2,160 m., Pittier, no. 3,405 (hb. Gray), in part. 



Senecio ( Multinervii) megaphyllus Greenman, sp. nov. 



Stem above arachnoid-tomentulose, striate: leaves large, 

 oblong-oblanceolate, including the petiole 3 to 5 dm. long, i 

 to 2 dm. broad, acute or acuminate-acute, more or less sinuate, 

 cartilaginous-dentate, narrowed below into a winged petiole 

 half-clasping the stem, arachnoid-tomentulose on both surfaces, 

 somewhat glabrate above except on the midrib; midrib and 

 lateral nerves prominent beneath: inflorescence a terminal 

 corymbose-panicle: heads many, on slender setaceous-bracteolate 

 peduncles: involucre cylindrical; bracts of the involucre 8, 

 linear, 10 mm. long, i mm. broad, acutish, glabrous, stramineous, 

 scarious-margined : ray-flowers 3 to 5, yellow: disk-flowers 5 to 8, 

 rather deeply 5-lobed: achenes glabrous. 5. multivenius, var. 

 oliganthus Greenm. Monogr. Senecio, I Th. 26 (1901) & in Engl. 

 Bot. Jahrb. xxxii. 22 (1902), without complete characterization, 

 not S. oliganthus DC. COSTA RICA. "Bords du Paraita 

 Grande au Copey," altitude 1,800 m., A. Tonduz, no. 11,700 (hb. 



