446 EUPHORBIACEZ OF WHEELER’S EXPLORATION. 
short petioles, lower ones broader and shorter; slender, dense-flowered, terminal spikes 2-3 inches long, staminate 
upward ; shorter spikes from the uppermost leaf-axils; bracts oval, deeply dentate ; styles divided into many very 
slender, long-protruding, 2 branches. — Ash Creek, Arizona, Rothrock, 1874 (299), and through New Mexico to 
Western Texas. — Very near the Mexican A. phleoides, Cav., with which Torrey, Bot. Mex. Bound. 199, was inclined 
to unite it. The slender mite with the delicate bright red failed give the plant a very elegant appearance. 
JATROPHA MACRORHIZA, Benth. Pl. Hartw. 8; Miill. l. c. 1087, var. SEPTEMFIDA. — Stems a span to a foot 
high, glabrous, very leafy ; leaves glabrous, with the nerves of the upper surface puberulent, cordate, with an [244] 
acute sinus, broader than long, divided about ? or more into 7 ovate or ovate-lanceolate, incisely dentate, aris- 
tate lobes ; stipules (2-3 lines long) setaceously divided ; petioles about }—? the length of the leaf; cymes densely 
many-flowered, short-peduncled, somewhat puberulent, with subulate-setaceous, entire, or the lower ones setaceously 
ciliate, bracts ; sterile flowers $ inch long, with lanceolate, aristate, usually entire calyx-lobes, half as long as the spat- 
ulate petals ; 5 (or rarely 6) exterior and 3 longer interior stamens, all united to about half their length, bearing 
equal, linear-oblong anthers ; calyx-lobes of fertile flowers broader, larger, spinulose-dentate ; styles 3, each with 2 
oblong stigmas ; capsule obtusely triangular, oblong, $ inch or more long ; seeds linear-oblong (4-5 inches long), with 
a large hoodlike, cut-fringed caruncle. — Sulphur Springs, Arizona, Rothr ock, 1874 (546), and to Southern New Mexico, 
and Chihuahua, Wislizenus. Leaves in the smallest specimens (Wislizenus, Chihuahua) 2 inches long by 2} inches 
wide, in Rothrock’s largest, 6 by 8 inches, always with 7 lobes and usually with 2 smaller additional ones at base. 
Evidently a form of the Mexican J. macrorhiza, and with the same curious caruncle of the seed, distinguished by the 
longer petioles, the much more deeply divided leaves, with more numerous and more deeply cut-toothed lobes, and an 
acute (not wide or truncate) sinus. Torrey’s J. multifida, Bot. Mex. Bound. p. 198 (not Linn.), is evidently the same 
thing, as already suggested ef the author himself, and probably nearer Bentham’s type than our plant, as the leaves 
are wid to be only 3-5-lo 
—— ees ALBOMARGINATA, Torr. ¢ Gray in Pacif. R. R. Report, 2, 174; Bot. Mex. Bound, 
86 ; Boissier in DC. Prod. 15, 2, 30 —A prostrate, much branched, glabrous, glaucous perennial, with orbiculate- 
cordate, entire, go fleshy abe (2-3 lines wide) and conspicuous, beniguiixe, membranaceous, whitish stipules ; 
involucres axillary, — sometimes crowded into foliaceous cymules, broadly campanulate with conspicuous, 
white, transverse, entire S watslues appendages of the glands ; capsules triangular ; seeds reddish-gray, linear or 
oblong, smooth or nee very slightly undulate. — Zui, Rothrock (173 in part), 1874, to Fort Tejon, California 
(274), 1875, and generally from Western Texas to Southern California and into adjoining Mexico. A very 
distinct species, easily recognized by its glaucous color and whitish stipules and white appendages. In Arizona [245] 
it is called “ Rattlesnake Weed,” as its acrid juice is considered an antidote against the venom of that reptile. 
In Mexico, to this, as well as to other allied species, known under the name of Golondrina, great medicinal virtues 
are ascribed. 
EvpHorsBia (ANISOPHYLLUM) FLAGELLIFORMIS, Engelm. in Hayden’s Bull. Geol. and Geog. Surv. Terr. 2, No. 
3, 243. E. petaloidea, var. eves Engelm. in Bot. Mex. Bound. 185. E. zygophylloides, var. flagelliformis, 
Engelm. in Boiss. 1 c. 29. — A glabrous annual, with prostrate or ascending branches a span to a foot long; linear or 
oblong-linear entire leaves, acutish : both ends, 4-6 lines long, 1 line wide: conspicuous triangular incised stipules 
and alternate loose-flowered leafy corymbs ; involucres broadly campanulate, with 2-4 large, concave, narrow-mar- 
ia or inappendiculate glands ; broad triangular capsule ; smooth gray seeds thick and short, triangular, acute. — 
mp Goodwin, Gila Valley, Arizona, Rothrock (339), 1874. Apparently a common plant in the sandy valleys of 
Rio Grande (Wright, Brandegee) and Gila, but very rarely collected. Dr. Rothrock’s specimens have a ligneous, 
very stout, tapering root 3 lines in diameter, with many stems (1-14 lines thick) from the neck, just as we some- 
times see other annual Anisophylla, E. hypericifolia among them, so that they simulate and actually become peren- 
nials ; real perennials, however, such as the next species, have cylindric or tuberous roots, usually with slender and 
even filiform bases to the stems, which are buried beneath the surface. The slender leaves and the short, leafy, alter- 
nate flowering branchlets, much shorter than the internodes of the elongated stems, characterize this species at once. 
Like the Californian E. ocellata, it is distinguished by large cup-shaped glands, usually less than four in number, and 
searcely or not at all margined. 
EvrHorsia (ANIsopHyLitUM) Fenpiert, Torr. & Gray, Pacif. R. R. Rep. 2, 175; Bot. Mez. Bound. 186 ; 
Boiss. 1. c. 38. E. rupicola, Scheele, not Boiss. —Glabrous ; many suberect or ascending, short, rigid stems of a 
finger’s length from a perennial root ; thick leaves, obliquely triangular-ovate to lanceolate, 1-2} lines long, entire, 
often reddish; stipules subulate or geal involucres in terminal and lateral leafy cymules ; 
glands with narrow or with longer, sometimes triangular, entire or dentate or lobed, greenish or reddish appen- [246] 
dages, or without any ; seeds ss dniich chinks: undulate and scrobiculate. —Santa Fé, Rothrock (13), 18745 
number 1003 is the same from Arizona. Not rare from Western Texas, through New Mexico and Southern Colorado 
