448 COLLECTED DESCRIPTIONS OF EUPHORBIACE. 
glabrous leaves linear-lanceolate; lower branches sterile with narrower leaves, upper ones flower-bearing; terminal 
umbel 5-rayed ; exterior floral leaves ovate-lanceolate, interior ones shorter, but all longer than wide; involucres 
turbinate-campanulate, on pedicels of nearly their own length; glands semilunate, with short horns ; styles longer 
than the ovary, united at base, bifid upward ; seeds ovate, gray, marked with irregular, shallow, dark impressions. 
w Spring, Arizona, Rothrock, 1874 (213); and southward and southwestward throughout Mexico. — The 
narrow leaves, especially on the sterile branches, and the narrow floral leaves, distinguish this species from its allies 
in the Southwest, and approach it, in habit at least, to the European 2. Esula. 
VI. COLLECTED DESCRIPTIONS OF EUPHORBIACE, 
From ENGELMANN AND GrAY’s PLANT# LINDHEIMERIANA, Part I. (Boston Journ. Nat. History, V. 1845).* 
171 Prutropnyrum LixpHeEmMeRt [24, 25]. 174 EvpHorsia BIcoLor [25]. 178 Cnrposconus stmmuLosus [26]. 
HORBIA GeyYERI, Engelm. mss.: depresse, humilis ; foliis oblongis retusis integerrimis glaberrimis ; sti- [52] 
pulis setaceo-multifidis ; involucri appendicibus petaloideis ; seminibus minoribus quam in Z. polygonifolia, cin- 
ereis. — Beardstown, Illinois, and Upper Missouri, Geyer. Near 2. polygonifolia. 
302 E. ARKANSANA [53]. 303 E. Marainata, 8. ULOLEUCA [53]. 306 ApHoRA HUMILIS [54]. 307 TRaGIA. 
BREVISPICcA [54]. 
From Gray’s MANvAL, Seconp Epirion, 1856. 
4, E. numistrata, Engelm. mss. Procumbent, puberulent or hairy; leaves elliptical with an oblique [886] 
obtuse base, serrulate towards the apex, sparsely hairy underneath (}-} inch long, sometimes with a brown spot 
above); peduncles rather shorter than the petioles, crowded in lateral clusters ; involucre cleft on the back, its appen- 
dages orbicular or truncate and nearly entire ; pod acutely angled, puberulent ; seeds ovate, 4-angled (2 line long).— 
With the last. — Branches 6-20 inches long. Distinguished from the next by its broader leaves, slit involucre, and 
rounder, granulated (not transversely grooved) seeds. 
18. E. commurtata, Engelm. mss. Stems branched from a commonly decumbent base (6-12 inches [389] 
high); leaves obovate, the upper all sessile, the upper floral roundish-dilated, broader than long; pod obtusely 
angled, crestless ; seeds ovate, pitted all over; biennial, annual, or perennial ?— Along water-courses, from Virginia 
toward the mountains to Ohio and westward. — Leaves often persistent over the winter on sterile shoots, turning red, 
like those of the European F. amygdaloides. Seeds 1 line long, larger than those of #. Peplus ; with which this has 
been confounded ; but the character of the pod and seeds readily distinguish it. 
From Torrey’s DescRIPTIONS OF PLANTS COLLECTED .. . BY W. P. Buaxe (Paciric R. R. Reps. Botany, Vot. V. 
APPENDIX, 1857).+ 
EUPHORBIA SETILOBA, Hngelm. mss. : prostrata, pilis brevibus patulis saepe glanduliferis tota puberula ; [364] 
foliis minutis e basi vix obliqua ey ovatis obtusis ; stipulis minutis deciduis ; glomerulis lateralibus ; 
involucris dorso profunde fissis, appendiculis in lacinias 3-4 subulatas divisis; stylis elongatis fere ad basin bifidis, 
stigmatibus clavellatis divaricatis ; capsula hispidula ; seminibus ovatis acutatis transverse rugulosis. Near Fort 
uma. Stem 3 inches long. Leaves 1 line long, reddish. LAER of the glands white, very conspicuous, almost 
setaceous. There are only about three male towers in each involucre 
From CHAPMAN’s FLORA OF THE SOUTHERN UNITED STATES. 
Evpnorsia Courtist, Engelm. Smooth; stems filiform; branches mostly 3, erect, sparingly a [401] 
leaves thin, linear or linear-oblong, obtuse, short-petiol ed, aaa or recurved ; involucres minute, sca’ 
on long capillary pedicels ; glands green, margined by the white crenate appendages ; capsule erect, genera 
round-angled; seed globose, smooth. — Low pine barrens, Florida to North Carolina. Aug. — Plant 6 to 9 inches 
high, sometimes branching from the base. Leaves 3-14 inches long. — [First edition, 1860.] ; 
E. petrorEa, Engelm. ined. Small, perennial ; stems (2-4 inches long) diffuse, glabrous; leaves (14 line 
long or less) petioled, obliquely deltoid, cordate, or reniform, sprinkled with short hairs, the margins narrowly revolute ; 
* Several joint species, the descriptions of which are by Gray, are indicated merely by name. — Eps. 
+ Torrey’s Botany of Whipple’s Expedition contains without description the manuscript name Z. leptocera, Engelin. 
Report, etc. vol. iv. p. 135. — Eps. 
