ROBINSON AND FERNALD. — MEXICAN PLANTS. 115 
fine cotton is used for making wicks for tapers of wild beeswax. This 
species is to be distinguished from . tomentosum, Robinson, by its 
glabrous calyx and relatively broader leaflets. 
EsenseckrA Harrmani. A shrub, 6-10 feet high: twigs thick, 
woody, covered with gray bark, leafy chiefly near the end: leaves 
simple, alternate, oblong or somewhat obovate, entire, rounded or re- 
tuse at the apex, somewhat narrowed below to an obtuse or rounded 
base, thickish, green, nearly smooth and finely reticulated above, 
tomentulose and scarcely paler beneath; the largest ones 16-20 lines 
long, 8-11 lines broad; the others considerably smaller (8-9 lines in 
length) ; petioles short, soft pubescent, 1-1} lines long: inflorescences 
short, terminal upon the branchlets; fruiting pedicels 1-3 together, } 
inch or less in length: the capsule tuberculately roughened, 9-10 lines 
in diameter ; pericarp white, thin and chartaceous, rather irregularly 
ruptured upon dehiscence; seeds subglobose, smooth, black, 3} lines 
in diameter ; scar white, narrow, linear, } line in breadth. — Collected 
in fruit at La Tinaja, Sonora, at 3,700 feet, by Mr. Hartman, 19 No- 
vember, 1890 (no. 240). This species much resembles the Lower 
Californian £. flava, Brandegee, but differs in its smaller greener 
shorter-petioled leaves, and its smaller fruit with chartaceous and not 
cartilaginous pericarp. The seeds of Z. flava also are larger and 
ave a much broader scar. 2 
ILeEx RuBRA, Wats. (Proc. Am. Acad. xxi. 422). Flowering 
specimens of this species, which was originally described in fruit, have 
been collected in an arroyo near Coloradas, by Mr. Hartman, May, 
1893 (no. 513), and add the following characters: flowers numerous, 
in small aggregated thyrses, greenish white, 4-parted: calyx lobes 
ovate, obtuse, } line long: corolla nearly 4 lines in diameter, about 
equalling the stamens ; the lobes rounded. 
Datea Lumnottzn. Stems many, slender, puberulent, punctate 
with yellow glands, simple or sparingly branched, erect from a decum- 
bent much branched suffrutescent base : upper leaves erect or ascend- 
ing, 1-13 inches long, leaflets 17-27, linear, 2-21 lines long, nearly 
4 line in breadth, obtuse, slightly narrowed to very short petiolules, 
glabrous, glaucous and glandular-punctate upon both surfaces ; the 
basal leaves numerous, shorter, and with considerably smaller almost 
filiform leaflets, silky under a lens: spikes ovate, capitate, 3-7 lines 1? 
length, becoming oblong, very densely flowered, covered with closely 
imbricated persistent bracts; the latter ovate or obovate, very 
_Tuptly pointed, silky upon the margins and especially near the some 
what narrowed base; glabrate and glandular-punctate upon the bac 
