ROBINSON AND GREENMAN. — MEXICAN PLANTS. 47 
branched, terminal, leafy-bracted at the base; bracts oblong-lanceolate, 
acute ; pedicels finely grayish-tomentulose ; heads rather small, numerous, 
radiate, few-flowered ; involucral scales about 3-seriate; the outer consid- 
erably shorter, linear-oblong, obtuse, 1 to 1} lines long with subherbaceous 
tips; inner scales subscarious, about 3 lines long, a line broad, acute, 
glabrous, except the ciliolated margins: disk-flowers about 12; corollas 
glabrous ; ray-flowers 2 to 3; ligules golden-yellow, 3} to 4 lines long: 
mature achenes 2 lines long, conspicuously winged on each margin, 
hispidulous on the surfaces; awns subequal. — Collected by C. G. 
Pringle, in rocky gulches, Monte Alban, Oaxaca, altitude 5,600 feet, 
15 August, 4 October, 1894, no. 4875. 
Verbesina variabilis. Shrub: branches striate-angled, mostly 
wingless and nearly glabrous: branchlets hoary-puberulent or glabrous, 
usually bearing narrow irregular deciduous brown corky wings de- 
current from the bases of the petioles: leaves alternate, short-petioled, 
ovate or lance-oblong, sharply and finely serrate or mucronulate-den- 
ticulate, acute to shortly acuminate at the apex, cuneately narrowed at 
the base, 2 to 3 inches long, 9 to 12 lines broad, above green, strigillose- 
puberulent and very scabrous to nearly smooth ; below scarcely paler, 
soft-pubescent on the pinnate and reticulated veins or quite glabrous: 
heads of middle size in terminal subsimple or compound corymbs, 
pedicels grayish-tomentose to merely puberulent: involucral scales about 
2-seriate, green, oblong, obtusish ; ray-flowers 10 to 12, yellow; ligules 
_ 6 lines long, about 2 lines broad, finely 2—3-dentate at the apex; disk- 
flowers about 60, pubescent: chaff cuneate, the apex truncate with 
short recurved apiculus : achenes very narrowly winged on both margins, 
» ut 1} lines long: awns 2, subequal. — Collected in three rather 
different forms, which, however, appear to have no satisfactory specific 
differences. The first, which may be regarded as the typical form, has 
tather broad dull green very pubescent leaves. It was collected by 
- G. Pringle, Sierra de San Felipe, altitude 9,500 feet, 24 September, 
1894, no. 4918, by E. W. Nelson, 18 miles southwest of the city of 
Oaxaca, altitude 7,500 to 9,500 feet, 10-20 September, 1894, no. 1393, 
ae by C. Conzatti on Sierra de San Felipe, altitude 9,000 feet, 29 
November, 1895, no. 831. A second form collected by Mr. Nelson on 
the top of the Sierra Madre near Chilpancingo, Guerrero, altitude 9,000 
to 10,200 feet, 24 December, 1894, no. 2240, differs only in having 
narrower oblong leaves, which are somewhat lucid above and somewhat 
ss pubescent. A third form, secured by Mr. Nelson at same place and 
date, no. 2215, has narrow oblong leaves, which are quite glabrous 
