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 in anthesis, becoming 8 lines long in fruit. — Collected by C. G. 
Pringle, in gulches of hills of Las Sedas, Oaxaca, altitude 6,000 feet, 
29 September, 1894, no. 4932, also by L. C. Smith, at Nacaltepec 
(Salomé), Oaxaca, altitude 6,500 feet, 21 September, 1895, no. 818. 
¢ Montanoa Rosei. Shrub 8 or 10 feet high: leaves opposite, 
slender-petioled, rhombic-ovate, serrate, not lobed, acuminate at the 
apex, 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, 2} to 3 
lines in length: disk-flowers about 4, with tube slender, nearly equalling 
the throat; rays about 3, about 2 lines in length: chaff densely fulvous- 
woolly. -— Montanoa (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 silky-villous upon both 
surfaces, more densely so and paler beneath, 3 to 6 inches or more in 
length, 4 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 strong 
midrib excurrent as a spreading tip: achenes somewhat compressed and 
‘conspicuously 4-angled, appressed-villous : pappus of two ariste some- 
what broadened at the base, and intermediate squamelle two on each 
“ide, ovate, ciliate-fringed. — Collected by E. W. Nelson, between 
Chilapa and Tixtla, Guerrero, altitude 5,200 to 7,000 feet, 17 December, 
1894, no. 21 69, 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 Viguiera and Encelia, but in 
habit approaching more closely species of the former genus. 
