166 PROCEEDINGS OF THE AMERICAN ACADEMY 
rowly oblong or lanceolate, some rounded at the apex, others acute: 
rays 12 to 25, little exceeding the disk; pappus of two very unequal 
awns, the inner more than half as long as the achene, the outer much 
shorter; achenes smooth, with a single rib on each face, edges acute, 
the outer usually wingless, the inner with a narrow wing, which ex- 
tends up upon the inner awn and there broadens into an auricular 
appendage. — Limestone hills, San José Pass, San Luis Potosi; Oc- 
tober, 1890 (n. 3310). From its peculiar pappus with wing-appet- 
‘dages this plant must be referred to the genus Otopappus as extend 
by Hemsley (Biol. Cent. Am. Bot. 2. 191), and placed near O. epale- 
aceus, Hemsl. The whole habit of the plant with its alternate leaves 
is that of a Verbesina, and it seems thus to connect the two genera, 
especially since there are several species of Verbesina, as V. Hunr 
boldtii, Spreng., and V. perymenoides, Schultz Bip., in which the 
achenes are more strongly winged on one side than on the other. 
SENECIO GUADALAJARENSIS. Herbaceous; stem erect, leafy, sul- 
cate-striate, smooth: leaves elongated lanceolate, 6 to 8 inches long, 
9 to 15 lines broad, acute, narrowed at base to a very short naked 
petiole, pinnately veined, callous-denticulate and minutely ciliate, cori 
aceous, glabrous on both sides except the veins beneath, the upper 
surface green, covered with lighter-colored warty blotches (pathologr 
cal ?), the lower surface very glaucous: corymb ample, with rather 
numerous medium-sized heads; scales of the involucre about 19, 
strongly carinate, acutish, 4 lines long : rays about 5, rounded at the 
apex; teeth of the disk-corollas exceeding the short campanulate 
throat and half the length of the slender tube proper: achenes ribbed, — 
puberulent. — Rich slopes of barranca near Guadalajara, Jalisco; Sep- 
tember, 1890 (n. 3280). 
LAURENTIA OVATIFOLIA. Annual, 6 to 12 inches high, pubert 
lent; stem slender, flexuous, angled, subsimple or branched above: 
leaves petiolate, ovate, acute, abrupt or subcordate at base, finely and 
regularly serrate, about an inch long, two thirds as broad, the lowest 
smaller, rounder, obtuse, the upper lanceolate; petioles 3 to 5 lines. 
long; pedicels filiform, curving upward, 9 to 12 lines long, two to four 
times longer than the linear-filiform bracts: flowers small, racemose 
calyx-tube hardly any, the lobes linear, acute, not quite equalling 
the corolla-tube ; corolla 2 lines long, the nearly white tube split 
half-way to the base behind; limb blue, with very dissimilar lobes, 
the three lower obovate, somewhat united to form a spreading lip, the 
two upper erect, contracted to narrow points: stamens inserted neat 
the middle of the tube, the two smaller anthers penicillate: capsule — 
