46 PROCEEDINGS OF THE AMERICAN ACADEMY. 
Verbesina Nelsonii. Stout, apparently herbaceous: stem striate- 
angulate, puberulent under a lens, internodes entirely wingless or with a 
broadish irregular deciduous corky wing near the summit: leaves green 
and glabrous on both surfaces, oblong, acuminate, penninerved, crenate- 
serrate, 6 to 8 inches long, 1} to 2 inches broad, below the middle 
slightly narrowed and somewhat crisped or undulate; the base broadly 
auriculate and amplexicaul, midrib prominent beneath, pale: heads 
numerous, of medium size, 4 to 5 lines in diameter, in a very dense 
terminal compound corymb; bracts oblong, small, scarcely herbaceous: 
pedicels tomeutulose : involucre campanulate; scales about 10, subuni- 
seriate, oblong, obtusish, 2 lines long; ray-flowers 4 to 6; ligules very 
small, yellow, 2 to 2} lines long, nearly a line in breadth: chaff obovate, 
mucronate, pubescent on the outer surface especially on the prominent 
keel: achenes a line long, hispidulous, with conspicuous wing on each 
edge, awns subequal. — Collected by E. W. Nelson, between Ayusinapa 
and Petallan, altitude 5,000 to 7,000 feet, 14 December, 1894, no. 2118. 
Verbesina Smithii. Branching shrub: branches glabrous, wing- 
less, covered with a pale grayish cortex roughened with numerous lenti- 
cels: branchlets gray-tomentose : leaves alternate, lanceolate, attenuate at 
both ends but obtusish and mucronulate at the apex, rather shallowly ser- 
rate-dentate except at the cuneate short-petioled base, bright green and 
scabrous-puberulent above, white-tomentose beneath, 3 to 4 inches long, 
10 to 14 lines broad: heads small, 2 lines high, 3 lines broad, not very 
numerous in small terminal corymbs; these 2 inches in diameter not 
exceeding the surrounding leaves: bracts small, grayish-tomentose as 
well as the pedicels: involucral scales about 3-seriate, elliptic-oblong, 
obtuse, green, pubescent on the outer surface, ciliated, a line long: 
disk-flowers 30 to 35; ray-flowers about 8; ligules yellow, 1} to 2 lines 
long; chaff obovate, obtusish, yellow toward the summit, puberulent on 
the outer surface: achenes (immature) distinctly winged on each side ; 
awns 2, slightly unequal. — Collected by L. C. Smith, at Jayacatlan, 
Oaxaca, altitude 4,500 feet, 10 September, 1894, no. 132. 
Verbesina trilobata. Stems 5 to 10 feet in height, branched, 
glabrous, lucid, wingless, covered with light colored cortex: leaves 
opposite, decussate, rhombic in general outline, strongly 3-lobed, den- 
ticulate, gradually narrowed to a subsessile base, scabrous-puberulent 
above, grayish-tomentose beneath, subpalmately and rather obscurely 
3-5-nerved from considerably above the base and reticulate-veined 5 
terminal lobe elongated, ovate to oblong-lanceolate, acuminate ; the 
lateral much shorter and rather blunt; sinuses rounded: corymbs much 
