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186 UNITED STATES iND MEXICAN BOUNDARY. 



of North America (abundant on the Mexican boundary line) and througliout Central and South 



America, but not in the eastern States. E. microphylla, BotJi, from India, is the same 

 plant. 



Euphorbia rea^oluta (nov. spec): erecto-j)atula; foliis linearibus revolutis obtusis basi sub- 

 fequalibus, stipulis setaceis ; anthodiis alaribus ; glandulis anguste appendiculatis ; st^lis 

 recurvis apice bifidis ; capsula acute angulata, seminibus angustis acute angulatis transverse 

 rugosis. (Gravelly hills near Kock creek ; Bigeloio. On the Rio Grande ; Wright^ No. 1830.) 

 New Mexico ; Fendler^ No. 789. Very slender^ 4-5 inches high ; leaves 6-10 lines long and ^ 

 line wide. Habit like a small slender E. petaloidea, but styles and seeds very different. 



Euphorbia polycarpa, Berdh. Bot,. Sulph. p. 50. Dry soils near San Diego, California; 

 Parry y Schott. Banks of the Gila; 3IaJor 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. ' 



( 



erecto-patula ; foliis e basi lata subsequali ovatis obtusis 



pilosis; stipulis inconspicuis ; anthodiis alaribus longius pedunculatis ; appendicibus glandula 

 purpurea multo majoribus obovatis tubo turbinate 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, 2^-3 lines wide. Seed very small, involucrum with 



the appendage 1^ line in diameter. 



Euphorbia pediculieera (nov. spec): procumbens, cinereo-pubescens ; foliis ovatis obtusius- 

 culis ; stipulis e basi lata lanceolatis ; glomerulis parvifloris in ramulis alternis terminalibus ; 



involucris hemi 



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. 



' Eui*iiOKBrA Fendleri, Torr. & Gray^ Bot. Pope's Rep. p. 19. E. rupicola, Scheele in Linncea^ 

 22, p. 15;J, wow Boiss. Common in New Mexico and Western Texas; Lindheimer^ Wright^ 

 Bigelow. Sonora ; Thurher. Variable in the form of the leaves and the shape or presence of 

 the appendages. 



Torr 



Com 



o 



Mexico. It is No. 330 of Drum- 



western Texas and the Great Colorado, and southward into 

 mond's second Texan Collection. 



Euphorbia cinerascens (nov. spec.) : erecto-patula s. 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 jmrpureis) 

 angustissimis marginatis ; stylis brevibus pilosis ; capsula acute angulata cana ; seminibus 



ovatis acute angulatis Ifeviusculis. On the Rio Grande ; Wright. Chihuahua and Sonora ; 

 Thurler, Bishop's Hill, near Monterey, Mexico ; Gregg. 



^. appendiculata : foliis utrumque cinereis ; appendicibus majoribus truncatis crenulatis ; 

 stigmatibus longioribus. San Felipe, California; Br. Le ContCy !/ hurher ; and San Gabriel, 

 Bigelow, Htem 4-6 inches high ; rounded leaves often tawny red, li-2 lines long ; flowers 



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