1632 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM 1 



peltate, slightly hirtellous above, more or less tomentose beneath, the margins 

 callous-denticulate; inflorescence a terminal, somewhat leafy, glandular-hirtellous, 

 paniculate cyme; heads 1 to 1.5 cm. high, inconspicuously radiate, or rays some- 

 times wanting; disk flowers about 12; achenes glabrous. 



43a. Senecio angulifolius var. ingens Greenm. Ann. Mo. Bot. Gard. 1: 276. 

 1914. 



South Mexico; type from Mount Ixtaccihuatl. 



Inflorescence compact, fewer and larger-headed than in the species; heads 1.5 , 

 to 2 cm. high, 40 to 50-flowered. j 



44. Senecio brachyanthus Greenm. Monogr. Senecio 1: 26. 1901; Bot. 

 Jahrb. Engler 32: 22. 1902; Ann. Mo. Bot. Gard. 1: 277. 1914. 



South Me.xico; type collected between Ayusinapa and Petathin, Guerrero. 



Shrub; stem terete, covered below with a brownish cortex; leaves petiolate, 

 palmately nerved, suborbicular, about 7-lobed, peltate or cordate at the base, 

 mucronate-denticulate, sparingly hirtellous on both surfaces, paler beneath; 

 petioles 13 cm. or less in length, naked, or occasionally winged; heads 10 to 12 

 mm. high, heterogamous; involucral bracts 8, glandular-hirtellous; ray flowers 

 mostly 5, more or less reduced; disk flowers 8 to 10; achenes glabrous. 



45. Senecio chapalensis S. Wats. Proc. Amer. Acad. 25: 155. 1890. 

 Southwest Mexico; type from Lake Chapala. 



Shrub; leaves petiolate, palmately nerved, peltate, ovate-orbicular, 5 to 7- 

 angulate-lobed, 3 to 10 cm. long, nearly or quite as broad, callous-denticulate, 

 slightly hirtellous above, paler and tomentulose beneath; petioles slender, 3 to 

 12 cm. long; heads 12 to 14 mm. high, conspicuously radiate; ray flowers 5; 

 rays whitish in the dried state; disk flowers 12 to 14; achenes striate, glabrous. 

 45a. Senecio chapalensis var. areolatus Greenm. Monogr. Senecio 1: 26. 

 1901; Bot. Jahrb. Engler 32: 22. 1902; Ann. Mo. Bot. Gard. 1: 278. 1914. 



South Mexico; type collected in wet canyon above Cuernavaca, Morelos. 



Shrub 1.5 to 2 meters high; leaves glabrous or essentially so on both surfaces, 

 strikingly areolate beneath; rays smaller than in the type. 



46. Senecio sartorii Schultz Bip.; Hemsl. Biol. Centr. Amer. Bot. 2: 247. 

 1881. 



South Mexico; type from the Cordilleras of Veracruz. 



Shrub; branches terete, ferruginous-pubescent; leaves petiolate, suborbicular, 

 6 to 20 cm. in diameter, obtusely 7 to 11-lobed, callous-denticulate, shallowly 

 cordate, glandular-hirtellous above, tomentose beneath; petioles 10 cm. or less 

 in length, the uppermost leaves sessile and oblong-ovate; heads 10 to 12 mm. 

 high, radiate; involucral bracts 8, ferruginous-puberulent; ray flowers commonly 

 5; rays conspicuous, distinctly 4 or 5-nerved; disk flowers 10 to 15; achenes 

 glabrous. 



47. Senecio petasitis (Sims) DC. Prodr. 6: 431. 1837. ■ 

 Cineraria petasitis Sims in Curtis's Bot. Mag. pi. 1536. 1813. I 

 Cineraria plataniJolia^(i\irSiTik, VI. 'Rax. pi. 95. 1817. Not -Senecio platanifolius 



Benth. 



South Mexico; described originally from cultivated specimens grown in 

 England. 



Shrub; stem above and the branches subvelvety-pubescent; leaves petiolate, 

 ovate-orbicular, 3 to 18 cm. long, nearly or quite as broad, sinuately 7 to 13- 

 lobed, callous-denticulate, cordate to subtruncate at the base, closely and finely 

 pubescent on the upper surface, densely subhirsute-tomentose beneath; petioles 

 2 to 14 cm. long, subhirsute; heads 12 to 15 mm. high, radiate; involucral bracts 

 usually 8, subhirsute-pubescent; ray flowers commonly 5; rays bright yellow; 

 disk flowers about 15; achenes glabrous. 



