STANDLEr TREES AND SHRUBS OF MEXICO 1633 



48. Senecio platanifolius Benth. PL Hartw. 43. 1840. 

 South Mexico; type from Chico. 



Stems erect, 1 meter or less high, ligneous at the base, herbaceous and granulose- 

 hirtellous with hirsutish hairs intermixed above; leaves orbicular, 3 to 12 cm. 

 long and broad, cordate, 5 to 9-lobed, dentate, crisp-hirsute above, pubescent 

 with long soft hairs on the veins beneath; petioles 3 to 15 cm. long; heads usually 

 few, relatively large, about 1.5 cm. high, radiate; involucral bracts 13, granulose- 

 hirtellous; ray flowers about 12; disk flowers numerous; achenes glabrous. 



49. Senecio gilgii Greenm. Monogr. Senecio 1: 26. 1901; Bot. Jahrb. Engler 



32: 26. 1902; Field Mus. Bot. 2: 282. 1907. 



South Mexico to Guatemala; type collected near Pinabete, Chiapas. 



Shrub; stem and branches pubescent above with spreading tawny hairs; 

 leaves long-petiolate, rotund to subreniform, 10 to 30 cm. broad, cordate, 7 to 

 9-nerved, sinuately lobed and the lobes again sublobate, mucronate-denticulate, 

 hirtellous-pubescent on both surfaces; petioles 8 to 14 cm. long, densely pubes- 

 cent; heads large, 1.5 to 1.7 cm. high, radiate; involucral bracts 13, densely 

 hirsute-pubescent; ray flowers 8 to 10; rays yellow, conspicuous; disk flowers 

 about 30; achenes striate, glabrous. 



50. Senecio orcuttii Greenm. Field Mus. Bot. 2: 350. 1912. 

 South Mexico; type from Omealca, near C6rdoba, Veracruz. 



Arboreous, 2 to 3 meters high; leaves petiolate, oblong-ovate in general out- 

 line, 60 cm. or less long, 30 to 35 cm. broad, deeply pinnately parted into oblong- 

 lanceolate lobes 4 to 8 cm. long and 1.5 to 4 cm. broad, acuminate, acute, remotely 

 apiculate-dentate, ciliate, dark green above, paler beneath, sparingly -pubescent 

 on both surfaces to glabrous; heads numerous, 12 to 15 mm. high, radiate; 

 involucral bracts 8, linear, 12 to 13 mm. long; ray flowers showy, yellow; disk 

 flowers 12 to 15; achenes glabrous. 



51. Senecio chicarrensis Greenm. Monogr. Senecio 1: 26. 1901; Bot. Jahrb. 

 Engler 32: 22. 1902; Field Mus. Bot. 2: 285. 1907. 



South Mexico; type collected near Chicarras, Chiapas. 



Shrub; stem leafy and white-tomentose above; leaves long-petiolate, oblong- 

 ovate, 12 to 27 cm. long, 10 to 18 cm. broad, sinuately and somewhat irregularly 

 lobed, subcordate to abruptly contracted into an unequal base, glabrous above, 

 floccose-tomentose beneath especially along the prominent midrib and lateral 

 nerves; involucral bracts 8; ray flowers 2 or 3; rays short, 2 to 2.5 mm. long; 

 disk flowers about 9; achenes glabrous. 



52. Senecio grandifolius Less. Linnaea 5: 162. 1830. 



Senecio ghiesbreghtii Hort. Hal.; Kegel, Ind. Sem. Hort. Petrop. 36. 1860; 

 Gartenflora 9: 230. pi. 296. 1860. 



South Mexico; described from cultivated material. 



Shrub, 3 to 4 meters high; stem and branches above bearing tufts of brownish 

 toraentum in the leaf axils; leaves petiolate, oblong-ovate, 15 to 40 cm. long, 

 5 to 22 cm. broad, the lower subincised-lobed, the upper sinuate-dentate, acute, 

 puberulent on the upper surface in the young stages but soon glabrate, crisp- 

 tomentulose with tawny hairs beneath, subcordate to rounded at the base, 

 margins callous-denticulate; petioles 5 to 10 cm. long; heads 6 to 8 mm. high, 

 radiate; involucral bracts 8; ray flowers commonly 5; rays yellow; disk flowers 

 10 to 12; achenes glabrous. 



53. Senecio uspantanensis (Coulter) Greenm. Monogr. Senecio 1: 26. 1901; 

 Bot. Jahrb. Engler 32: 22. 1902; Field Mus. Bot. 2: 286. 1907. 



Senecio ghiesbreghtii var. uspantanensis Coulter, Bot. Gaz. 20: 52. 1895 (ex- 

 cluding John Donnell Smith no. 1598). 

 South Mexico and Guatemala; type from San Miguel Uspantdn, Depart, 

 Quiche, Guatemala. 



