EUPHORBIACEE OF WHEELER’S EXPLORATION. 447 
to Arizona. <A diminutive, suberect bush of many stems and branches, very variable in the width of its leaves, but 
readily recognized by the Beha enumerated. 
EvuPHorsia (ANISOPHYL pies POLYCARPA, Benth. Bot. Sulph. 50; Bot. Mex. Bound. 186; Boiss. l. c. 44. —A 
perennial, often flowering in ihe first year as an annual, prostrate or erectinh, glabrous, sometimes pubescent (or even 
tomentose in a variety), with orbicular-cordate or oblong entire leaves, always with linear, delicately ciliate stipules ; 
involucres axillary, rarely crowded into few-flowered cymes ; appendages of the dark red (or, when dry, black) nn 
large and conspicuous, or smaller; seeds gray-reddish, linear-oblong quadrangular, smooth or slightly undulate. 
tspieal large-flowered, glabrous form is found principally along the Pacific coast from Cape St. Lucas to the toe 
part of the State of California; inland, and se Ange in the California Desert and up the Gila, where Dr. Rothroc 
collected it in 1874, a larger, wide-spreading, very much ramified form is found, with smaller, glabrous or pubescent, 
oblong or oblong-linear leaves $-1} lines ee with smaller paeacatn very small, almost or entirely inappendiculate 
aida and very short styles, but seeds of the same size and form as in the type. The stipules of all forms are alike, 
linear, entire, minutely ciliate. Z. micromera, Boiss. 1. ¢, 44, seems identical with this last form, and we will have to 
consider E. melanadenia, Torr. Pacif. R. R. Rep. 4, 135, as a tomentose variety, as suggested by S. Watson; an 
intermediate form is E. cinerascens, Engelm. Bot. fee Bound. 186. 
EvPHORBIA (ANISOPHYLLUM) SERPYLLIFOLIA, Pers. Ench. 2, 14; Boiss. l. c. 43; Gray, Man. 432. E. inequi- 
latera, Engelm. Bot. Mex. Bound. 187 ; not Sonder. — Zuiii, pee 1874 (173). An extremely variable species, 
but readily recognized by its glabrous, — leaves, acute at the unequal base, broader and serrulate at the rounded 
tip; stipules setaceously divided; involucres in lateral leafy clusters ; seeds gray, linear, acutely 4-angled, 
slightly wrinkled or pitted. The ao Fes E. glyptosperma, Engelin., may always be distinguished by the [247] 
broad semicordate base of the leaves, the lower half of which is sicotrented and almost auriculate, and by the 
sharply cross-ribbed and at the angles shined ne The form collected at Zufi is suberect, nearly a span high, with 
leaves more sharply serrate than usual, and more distinctly rugose. 
EvpnHorsiA (ANISOPHYLLUM) PEDICULIFERA, Engelm. Bot. Mex. Bound. 186 ; Boiss. l. c. 48.— Plant, pale dull 
green, covered with a short, scanty pubescence ; many prostrate stems from a perennial root, a span to a foot long 5 ; 
leaves rather large (6 lines long or more), obliqye, pe , obtuse, entire ; small stipules pion ribnede oe, ; invo- 
lucres in fow-flowered, lateral leafy cymes ; glands wit beceil dentate appendages ; capsules canescent ; seeds oblong, 
angular, strongly marked with 4 deep transverse grooves, deeply notched on the edges. Asia near Tucson, Ariz., 
Rothrock, 1874 (576). A native of our extreme Southwest, from Arizona to Southern California and into adjoining 
Mexico ; well marked by its larger, dull grayish-green leaves, and especially by the (for the section) Targe, deeply 
grooved iat notched seeds, which curiously simulate some insect. 
EvpHorsia (ANISOPHYLLUM) HYPERICIFOLIA, Linn.; Bot. Mex. Bound. 188; Gray, Man. 432.—Two forms 
were collected by Dr. Rothrock in 1874. The common form (672) from Camp Crittenden, Southern Arizona, is that 
of the States, called E. Preslii, Guss., Boiss. 1. ¢. 22, glabrous, with rather small, blackish, much cross-wrinkled 
seeds, The other form (720), from Castip Lowell, ‘Southern Arizona, has seeds larger than the last, in size between 
those of EZ. Brasiliensis, Lam., and the large-seeded E. Bahiensis, Hild; and in form similar to them ; all of these 
have thick, short, almost odaticclebie. black seeds, with few prominent tubercles arranged in about 2 interrupted 
nsverse ridges. Our plant is nearly glabrous ; leaves very pale below, with long, sparse cilia on the upper edge 
near the eee The different species allied to H. hypericifolia require further study, as it is a mooted ea 
whether the pubescence of the plant and even that of the capsules, and the size, the color, and the ee of 
seed, constitute here specific differences. If they do not, then we have here one of the most polymorph 
species, spread over all the warmer countries of the globe, and most difficult to define by floral and varilogieil, [248] 
but easily recognized by the vegetative characters. 
Evpnorsia (PornsETTIA) CUPHOSPERMA, Boiss. 1. c. 73. E. dentata, var. cuphosperma, Engelm. Bot. Mex. Bound. 
190.—A slender, erect annual, 1-1} feet high, simple or with few erect branches, nearly glabrous, with few bristly 
hairs; leaves lance-linear, 1-2 inches long, upper involucral ones longer and a little wider, but scarcely discolored at 
base, all entire or with a few teeth on the revolute, scabrous margins; the large involucres in loose clusters, eA cam- 
panulate, with 1 or 2, rarely more, slender, almost tubular glands; seeds short and thick, triangular, trunca 
ie ekipam and tuberculate, with a minute caruncle. —Cienega (Creek), Arizona, near Tudaodi, Rothrock, sera apts 
are plant, found only once before, by Wright, mistaken by me for a form of E. dentata, but well distin- 
guished ees that species (which extends far into Mexico) by its involucres and seeds. . dentata has much smaller 
turbinate Sener with broad glands, and smaller ovate or subglobose, minutely tuberculated seeds. 
PHORBIA (TITHYMALUS) DICTYOSPERMA, Fisch. & Mey.; Boiss. 1. c. 135; Gray, Man. 434.— Camp Grant, 
Arizona, Rothrock (370), 1874. 
Evrnorsia (TITHYMALUS) CAMPESTRIS, Cham. & Schlecht. Linn. 1830, 84; Boiss. l. c. 146. E. esuleformis, 
Schaner, Linn, tae 729; Bot. Mex. Bound. 192. — Seven erect stems, 1-1} feet high, from a stout perennial root; 
