ROBINSON AND GREENMAN. — MEXICAN PLANTS. 45 



flowers 10-12 ; ligules 6 lines long, 2 to 3 lines broad ; disk-flowers 

 numerous, with the tube about a third as long as the ampliated throat : 

 fruiting heads globose, 1| inches in diameter; achenes 2 lines long: 

 chaff lanceolate-attenuate, straight-pointed or nearly so, puberulent or 

 almost glabrous except the strong ciliation of the margins, 4 to 5 lines 

 long iu authesis, becoming 8 lines long in fruit. — Collected by C. G. 

 Priugle, in gulches of hills of Las Sedas, Oaxaca, altitude 6,000 feet, 

 29 September, 1894, no. 4932, also by L. C. Smith, at Nacaltepec 

 (Salome), Oaxaca, altitude 6,500 feet, 21 September, 1895, no. 818. 



Montaiioa Rosei. Shrub 8 or 10 feet high : leaves opposite, 

 sleuder-petioled, rhombic-ovate, serrate, not lobed, acuminate at the 

 apes, cuneate at the base, rather harsh in texture, scabrous and some- 

 what rugose above, scarcely paler, finely pubescent and glandular-dotted 

 beneath, 3 to 4 inches long, half as broad : corymbs ample: bracts linear: 

 involucral scales lance-attenuate, sub-uniseriate, silky-villous, 2h to 3 

 lines in length : disk-flowers about 4, with tube slender, nearly equalling 

 the throat ; rays about 3, about 2 lines iu length : chaff densely fulvous- 

 woolly. — 3Tontanoa (Enocoma) sp., Rose, Contrib. U. S. Nat. Herb. i. 

 103. — Collected by Dr. E. Palmer, at Alamos, W. Mexico, 26 March 

 to 8 April, 1890, no. 394. 



Viguiera Nelsonii. Stem terete, densely silky-villous with white 

 subappressed hairs : leaves attenuate at both ends, sessile, 3-nerved from 

 above the base and pinnately veined, appressed silk3--vil]ous upon both 

 surfaces, more densely so and paler beneath, 3 to 6 inches or more in 

 length, ^ to 1^ inches in breadth : heads 12 to 20 in number, 12 to 18 

 lines in diameter, borne in a terminal corymbose panicle ; the individual 

 peduncles an inch or two long: involucral bracts 2-3-seriate, narrowly 

 oblong-lanceolate, silky-villous especially near the margins : somewhat 

 thickened at the base ; the tips lax and spreading : rays about 10, orange- 

 yellow, oblong, slightly 2-3-toothed at the apex, 6 to 8 lines in length : 

 disk-flowers more than 50, concolorous : chaff carinate, with stronsr 

 midrib excurrent as a spreading tip : achenes somewhat compressed and 

 inconspicuously 4-augled, appressed-villous : pappus of two aristje some- 

 what broadened at the base, and intermediate squamellje two on each 

 side, ovate, ciliate-fringed. — Collected by E. W. Nelson, between 

 Chilapa and Tixtla, Guerrero, altitude 5,200 to 7,000 feet, 17 December, 

 1894, no. 2169, and by L. C. Smith in mountains of Huitzo, Oaxaca, 

 altitude 6,500 feet, 16 November, 1895, no. 899. As to character of 

 achenes a dubious intermediate between Virjuiera and Encelia, but in 

 habit approaching more closely species of the former genus. 



