OF ARTS AND SCIENCES. 109 
above, paler and subglabrous below, 1}—2 inches long; the cauline 
usually a single pair, reduced to short linear bracts: heads including 
rays 14 inches broad: outer bracts of the involucre ovate, commonly 
purplish, obtusish, 4 lines in length, the inner somewhat longer, nar- 
rower and ciliolate: rays purplish white, oblong, conspicuously 3-toothed, 
exceeding half an inch in length, abruptly contracted below into a very 
slender tube: receptacle elongated: chaff filiform: achenes black, 
glabrous. — In pine forests, Nevado de Toluca, 12,000 ft., September, 
1892 (n. 4226). 
VERBESINA ONCOPHORA. Shrub: younger parts gray-tomentu- 
lose: leaves lance-elliptic, acuminate in each direction, thickish, 3-7 
inches long, finely and rather regularly serrate, scabrous above, tomen- 
tose and pulverulent beneath with yellowish white hairs; petioles }—} 
inch long; a small fleshy folded finally deciduous appendage occurring 
on each side of the base: corymbs compound, many headed: heads 
4 lines in diameter: scales of the involucre acute, not at all foliaceous : 
rays yellow, about 8, exserted 2-3 lines: disk flowers pubescent: 
achenes rather narrowly winged, 1} lines long, hispidulous upon the 
faces. — Sierra de las Cruces, State of Mexico, October, 1892 (n. 4310) ; 
Bourgeau’s 967, Forest of San Nicolas, near Mexico, 1865-66. Near 
V. persicifolia, DC., but differing in the greater pubescence and finer — 
serration of the leaves, the presence of the peculiar excrescences on 
the stem at the base of the petioles, and in the pubescent corollas. 
Tripax Paumert, Gray, var. InpIvisA. Rough pubescent, 
almost hirsute: leaves ovate, rather irregularly dentate, scabrous, 
undivided. — Cafion ledges, mountains near Lake Chapala, Jalisco, 
November, 1892 (n. 4332). This plant corresponds except in its 
pubescence to Parry & Palmer’s 489. But both of these specimens 
differ so conspicuously from the form of the species with divided leaves, 
represented by Parry & Palmer’s 482} and 490, and Schaffner’s 236, 
that it seems best to characterize them asa variety. Parry & Palmer's 
489 corresponds rather closely with this variety in its foliage, but is 
much less pubescent, and in this regard furnishes a transition to the 
smoother forms with undivided leaves, represented by the other type 
Specimens (Parry & Palmer’s 482} and 496) and by Schaffner’s 256, _ 
Scukunria Gtomerata. Roots fibrous: stem simple, erect, 
striate, glandular-hirsute, 1} feet high: the lower leaves opposite, 
petiolate, minutely resinous-dotted, palmately 3-parted to the base; 
Segments linear or linear-oblong, the middie one sometimes toothed, 
the lateral ones very deeply bifid: the upper leaves alternate, sessile, 
simplified ; heads aggregated at the ends of the branches: pedicels 
