STANDLEY TREES AND SHEUBS OF MEXICO 1627 



South Mexico; type from Orizaba; type of S. deppeanus from Malpais de 

 Naulingo. 



Fruticose, 1 to 2 meters high; stem erect, striate, at first tomentose, some- 

 what glabrate; leaves petiolate, lanceolate, 5 to 18 cm. long, 1 to 5 cm. broad, 

 acuminate, acute, entire or denticulate, floccose-tomentulose above in the 

 younger stages but glabrate, densely and permanently white-tomentose beneath; 

 inflorescence many-headed; heads about 8 mm. high, radiate; ray flowers usually 

 8; rays yellow; disk flowers 20 to 25; achenes puberulent. 



17. Senecio salignus DC. Prodr. 6: 4.30. 1837. 



Cineraria salicifolia H. B. K. Nov. Gen. & Sp. 4: 188. 1820. 



Senecio vernus DC. Prodr. 6: 430. 1837. 



Cineraria verna Mairet; DC. Prodr. 6: 430. 1837. 



Senecio axillaris Klatt, Abh. Naturf. Ges. Halle 15: 333. 1881. 



Southern Arizona through Mexico to Guatemala; type collected between 

 Cerro Ventoso and Mordn. 



Shrub, 1 to 2 meters high, glabrous throughout; stem branched, terete, covered 

 with a brownish cortex; leaves sessile, narrowly lanceolate, 3 to 12 cm. long, 

 0.5 to 1.5 cm. broad, entire or denticulate; inflorescence a terminal paniculate 

 cyme; heads many, 8 to 10 mm. high, radiate; involucral bracts usually 8, 

 stramineous, shorter than the disk flowers; ray flowers commonly 5; rays bright 

 yellow; achenes hirtellous-pubescent. "Jarilla" (Valley of Mexico); "jaral ama- 

 rillo" (Valley of Mexico); "chilca" (Chiapas); "flor de dolores" (Guatemala). 



A decoction of the leaves is employed locally as a remedy for intermittent 

 fevers, and in the form of fomentations to reduce the pain of rheumatism and 

 similar affections. 



18. Senecio schaffneri Schultz Bip.; Klatt, Leopoldina 24: 126. 1888. 

 Senecio grandifolius var. glabrior Hemsl. Biol. Centr. Amer. Bot. 2: 240. 



1881, in part. 



South Mexico; type from Mirador, Veracruz. 



Shrub 1 to 4 meters high; stem below covered with a grayish bark, above, as 

 well as the branches in the younger stages, somewhat striate and arachnoid- 

 tomentose but soon glabrate; leaves petiolate, oblong-lanceolate to ovate, 5 to 15 

 cm. long, 2 to 12 cm. broad, sinuate-angulate-lobed, cuneate at the base, conspic- 

 uously reticulate-veined, glabrous above, pubescent beneath especially on the 

 midrib and lateral nerves; petioles 2 to 7 cm. long, naked; heads many, 10 to 

 12 mm. high, radiate; bracts of the involucre usually 5; ray flowers mostly 3; 

 rays yellow; disk flowers about 6; achenes glabrous. 



19. Senecio barba-johannis DC. Prodr. 6: 430. 1837. 

 Senecio grahami Benth. PI. Hartw. 18. 1839. 



Senecio pullus Klatt, Abh. Naturf. Ges. Halle 15: 333. 1882. Not S. pullus 

 Klatt, Bull. Herb. Boiss. 4: 469. 1896. 



South Me.xico. 



Shrub 2 to 3 meters high; stem below covered with a grayish brown cortex, 

 branched, and densely tomentose in the younger parts; leaves petiolate, ovate 

 to oblong-ovate, 5 to 15 cm. long, 3 to 9 cm. broad, mucronate-acute, callous- 

 denticulate and more or less sinuate, rather thick in texture, at first tomentulose 

 above but soon becoming glabrous and smooth except on the midvein and lateral 

 nerves, densely and persistently tomentose beneath, cordate at the base; petioles 

 2.5 to 8 cm. long, densely tomentose; heads many, about 1 cm. high, radiate; 

 involucre tomentose; ray flowers usually 5; disk flowers 10 to 15; achenes glabrous. 

 "Barba de Juan de Dios" (Valley of Mexico); "gordolobo" (Hidalgo). 



Villada reports that the sap of the thick stems is sometimes resorted to by 

 travelers as a substitute for drinking water. 



