1630 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM 



31. Senecio ehrenbergianus Klatt, Leopoldina 24: 125. 1881. 

 South Mexico; type from Puebla. 



Stem scandent, densely lanate-tomentose at the ligneous base, herbaceous and 

 glabrous or slightly pubescent above; leaves petiolate, lanceolate to ovate in 

 general outline, 4 to 12 cm. long, 1.5 to 10 cm. broad, more or less incise-lobed, 

 cuneate to subcordate at the base, sparingly pubescent on both surfaces, paler 

 beneath; heads few, large, 1.2 to 2 cm. high, radiate; disk flowers numerous; 

 achenes glabrous. 



32. Senecio anisophyllus Klatt, Leopoldina 24: 124. 1888. 



Senecio hederaefolius Buchinger & Schultz Bip., not Hemsl.; Klatt, Leopoldina 

 23: 124. 1S88. 



South Mexico; type from Pelado. 



Shrubby; stem terete, glabrous, branched; lower leaves petiolate, cordate, 

 trilobate, 7-nerved, the upper leaves sessile, lanceolate, acute; heads radiate, 

 comparatively few, disposed in a subcorymbose cyme; ray flowers about 6; disk 

 flowers 25 to 30; achenes glabrous. 



33. Senecio chrismarii Greenm. Monogr. Senecio 1: 26. 1901; Hot. Jahrb. 

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



South Mexico. 



Shrub; stem at first sparingly pubescent, later becoming glabrous; leaves 

 petiolate, palmately ner^jpd, triangular-ovate in general outline, 7 to 10 cm. 

 long, 5 to 8 cm. broad, hastate or somewhat halberd-shaped, 3 to 5-lobed, mu- 

 oronate-denticulate, deeply cordate, above sparingh^ hirtellous, beneath glabrous 

 or sparsely puVjerulent on the nerves; petioles slender, 4 to 9 cm. long; inflorescence 

 a terminal, loose, few-headod, densely glandular-puberulent panicle; heads 1.2 to 

 1.5 cm. high, discoid; disk flowers about 20; achenes glabrous. 



34. Senecio hederaefolius Hemsl. Biol. Centr. Amer. Bot. 2: 241. 1881. 

 South Mexico. 



Base of plant unknown; stem above and the inflorescence glandular-puberulent; 

 leaves petiolate, suborbicular in general outline, 3 to 10 cm. in diameter, 3 to 

 5-angulate-lobed, callous-denticulate; inflorescence a terminal paniculate cyme; 

 heads discoid, about 20-flowered; achenes glabrous. 



35. Senecio alienus Robins. & Seat. Proc. Amer. Acad. 28: 110. 1893. 

 South Mexico; type collected near Pdtzcuaro, Michoacdn. 



Stem below ligneous; leaves petiolate, excentrically peltate, triangular-ovate 

 in general outline, 3 to 5-angulate-lobed, 5 to 10 cm. long, nearly as broad, apicu- 

 late-acute, callous-denticulate, essentially glabrous on both surfaces, paler 

 beneath; inflorescence a terminal, somewhat leafy, minutely glandular-hirtellous 

 panicle; heads about 12 mm. high, discoid; flowers few; achenes glabrous. 



36. Senecio hederoides Greenm. Monogr. Senecio 1: 26. 1901; Bot. Jahrb. 

 Engler 32: 22. 1902; Bull. Herb. Boiss. IL 6: 868. 1906. 



South Mexico; type from Reyes, Oaxaca. 



Shrub; younger stems and branches tomentulose; leaves petiolate, palmately 

 nerved, ovate-rotund, 3 to 8 cm. long, nearly or quite as broad, mostly 5-lobed, 

 abruptly cuneate to subcordate at the base, granulose-hirtellous above, sub- 

 tomentose beneath, the lobes mucro'nate-acute, the margins callous-dentate; 

 heads numerous, 10 to 12 mm. high, radiate; bracts of the involucre usually 8, 

 glandular-hirtellous; ray flowers commonly 5; rays yellow; disk flowers about 10; 

 achenes glabrous. 



37. Senecio oaxacanus Hemsl. Biol. Centr. Amer. Bot. 2: 244. 1881. 

 South Mexico; type from Oaxaca. 



Shrub; leaves petiolate, membranaceous, 3 to 5-nerved from the base, sub- 

 orbicular, 7 to 10 cm. long, equally broad, sinuately 7 to 9-lobed, callous-denticu- 



