186 UNITED STATES AND MEXICAN BOUNDARY. 
of North America (abundant on the Mexican boundary line) and throughout Central and South 
America, but not in the eastern States. E. microphylla, Roth, from India, is the same 
plant. 
EUPHORBIA REVOLUTA (nov. spec.): erecto-patula; foliis linearibus revolutis obtusis basi sub- 
equalibus, stipulis setaceis; anthodiis alaribus; glandulis anguste appendiculatis ; stylis 
recurvis apice bifidis; capsula acute angulata, seminibus angustis acute angulatis transverse 
rugosis. (Gravelly hills near Rock creek ; Bigelow. On the Rio Grande; Wright, No. 1830.) 
New Mexico ; Fendler, No. 189. Very slender, 4-5 inches high ; leaves 6-10 lines long and 4 
line wide. Habit like a small slender E. petaloidea, but styles and seeds very different. 
EUPHORBIA POLYCARPA, Benth. Bot. Sulph. p. 50. Dry soils near San Diego, California ; 
Parry, Schott, Banks of the Gila; Major Emory. Sonora; Wright, No. 1854. "This is a very 
- variable plant, if all the forms which I refer to here really belong to it. Seeds smooth or 
undulate, appendages none, or small or large; plant smooth or pubescent, (and then always 
with short patulous hairs.) Collected by all the botanists from the upper Gila to San Diego. 
The only species of the section Anisophyllum which, so far as I know, has both smooth and 
pubescent forms, with the exception of E. hypericifolia. 
EUPHORBIA ARIZONICA, (nov. spec.): erecto-patula ; foliis e basi lata subæquali ovatis obtusis 
pilosis; stipulis inconspicuis; anthodiis alaribus longius pedunculatis ; appendicibus glandula 
purpurea multo majoribus obovatis tubo turbinato postice fisso brevioribus; stylis erectis ad 
medium bifidis ovario puberulo longioribus, stigmatibus filiformibus ; capsula pilosa ; seminibus 
rugoso-verrucosis ad angulos acutos crenulatis. Sierra Yanos, Sonora, July ; Schott. Stems 
4-5 inches high ; leaves 3-4 lines long, 24-3 lines wide, Seed very small, involucrum with 
the appendage 14 line in diameter. 
EUPHORBIA PEDICULIFERA (nov. spec.): procumbens, cinereo-pubescens ; ; foliis ovatis obtusius- 
eulis ; stipulis e basi lata lanceolatis ; glomerulis parvifloris in ramulis alternis terminalibus; 
involucris hemisphericis ; glandulis magnis; appendicibus transversis crenatis; stylis patulis 
pubescentibus ad basin fere bifidis ; stigmatibus divaricatis ; capsula acute angulata pubescente, 
seminibus compressis angulatis sulcis 4 profundis transverse incisis, Sonora; Wright, (No. 1848,) 
Schott. Spreading 6-12 inches. Leaves 3-4 lines long, oblique. Involucrum large. * Seeds 
0.7 line long, deeply 5-lobed, similar to some insects. | 
EurnonBrA FENDLERI, Torr. Ф Gray, Bot. Pope's Вер. p. 19. Е. rupicola, Scheele in Linnea, 
22, p. 153, non Boiss. Common in New Mexico and Western Texas; Lindheimer, Wright, 
Bigelow. Sonora; Thurber, Variable in the form of the leaves and the shape or presence of 
the appendages. 
EUPHORBIA ALBOMARGINATA, Torr. é t Gray, 1. с. р. 18. Common in the whole region between 
western Texas and the Great Colorado, and southward into Mexico. It is No. 330 of Drum- 
mond’s second Texan Collection. : 
EUPHORBIA CINERASCENS (nov. spec.): erecto-patula в. subdecumbens, pubescenti-canescens ; 
foliis e basi lata obliqua ovatis s. suborbiculatis obtusis supra glabratis; stipulis lanceolatis 
minutis mox deciduis; glomerulis lateralibus ; involucris canis ; glandulis (plerumque purpureis) 
E. angustissimj marginatis; stylis brevibus pilosis; capsula acute angulata cana; seminibus 
de ovatis acute angulatis leviusculis. On the Rio Grande; Wrights: Chihuahua and Sonora ; 
Thurber. Bishop’s Hill, near Monterey, Mexico ; Gregg. 
8. igh ay eo pe foliis utrumque cinereis ; appendicibus majoribus truncatis а ; 
longioribus. San Felipe, California ; Dr. Le Conte, 1 hurber ; and бак od, 
Bigio. Stem 4-6 inches high ; rounded lives often tawny red, Зээ lines 
C 
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