EUPHORBIACE® OF THE MEXICAN BOUNDARY. 437 
EUPHORBIA COLORATA, m. sp.: erecta, glaberrima; foliis breviter petiolatis sane patulis punert [191] 
linearibus revolutis integris ; foliis ples: basi paullo dilatatis puniceis subinde circinatis ; glandulis 
itatis cyathiformibus compressis margine revoluto sepe crenulatis involucri lobos ia coloratos pene ok 
stylis brevibus purpureis erectis longe connatis, ene bifidis, stigmatibus acutis demum recurvis. Dry arroyos, Aqua 
Zarco, Sonora, May ; and Santa Orng, Sept.; Thurber & Capt. E. K. Smith. Specimens incomplete, nearly a foot high. 
Leaves 3~4 inches long, scarcely more than a line wide ; floral leaves shorter and about 2 lines wide, deep crimson. 
Sie aa from £. heterophylla by the narrow revolute leaves, ete. Margin of involucre and styles also purplish. 
sule glabrous and seeds tuberculate, as in the allied species. 
EvPHORBIA RADIANS, Benth. Pl. Hartweg, p. 38. Plains between San Bernardino and Santa Cruz, Sonora, 
April ; Capt. E. K. Smith. Dry valleys near Buena Vista, Mexico; Dr. Gregg, Dr. Wislizenus. Mexico; Berlandier 
(No. 116 and 1375). Root tuberous ; flowers in early spring, before the leafy shoots put out. 
EUPHORBIA ERIANTHA, Benth, Bot. Sulph. p. 51. Sonora; Wright (No. 1841 2). 
§ IV. UMBELLATA, 
Evpnorsia Wricutul, Torr. é Gray, Bot. Pope’s Rep. On the San Felipe and the San Pedro, Western Texas; 
Wright (No. 1827). 
EUPHORBIA MULTICAULIS, m. sp.: annua seu biennis, multicaulis, humilis, erecta, glabra; foliis lineari-ob- 
lanceolatis acutis mucronatis serrulatis basi angustata sessilibus ; — trifidis, ramis bifidis, bracteis lanceolatis, 
superioribus ovato-lanceolatis acutis; involucri glandulis Siarediing ovatis ; stylis basi liberis ad medium seu ultra 
bifidis; capsule coccis dorso verrucosis ; seminibus lenticularibus levibus fui: Sonora ; Thurber. About a dozen 
stems foie a tapering root, 6 inches high, a nd with erect branches ; leaves 4-6 lines long, 1 line wide. Nearly allied 
to E. obtusata. 
PHORBIA DICTYOSPERMA, — & Mey. Ind. Sem. Petrop. 1835. E. Arkansana, Engelm. & Gray, Pl. Lindh. 1, 
p- 26. isk Texas ; Wright. Var. Mexicana: annua seu plerumque biennis, e basi erecto-ramoso ; foliis versus 
apicem crenato-serratis, lobis serie} subintegris; ovarii coccis git solum verrucosis. Valley of the Nagas, Balson 
de Mapimi, Dr. Gregg ; Western Texas ; Wright (No. 1824). ococca: capsulis levibus seu vix hine inde ver- 
ruculosis. Texas; Drwmmond ; II. 327. Near the Colorado, at eed ; ; Wright. 
EUPHORBIA TETRAPORA, ”. sp.: annua, erecta, glaberrima; foliis cuneatis obtusis seu pleramgue retusis emar- 
ginatis Jeet : aes trifidis ; aa spathulatis seu peti oribus orbiculatis basi truncatis ; cornubus invo- 
lucri setaceis _ transversam eepueitiion? ; capsula dorso levi; seminibus facie ventrali é-punctatis dorsali 
leviusculis. Georgia; Boykin. Louisiana ; oie Texas; Lindheimer, Wright. Near E. Peplus, as is the following 
species, but distinguished by the piace and t 
RBIA PEPLIDION, 2. sp. : ae aberrima, e basi ramosissima; foliis confertis e basi angustata 
inablancilas mitt umbellis “Didi pra bracteis lanceolatis acutis ; cornubus involucri glandulam 
m s obtusis; capsule coccis obtusis non alatis seminibus facie ventrali 2-sulcatis, dorsali 
sine to-exsculptis. peas ere Wistexs Texas; Wright (No. 1823). A small plant, 3-4 inches high, much 
branched from the base, of the habit of #. exigua. Seeds very similar to those of #. Peplus, 0.6 line ae 
EUPHORBIA — Nutt. in Trans. Amer. Phil. Soc. (n. sev.) 5, p. 172, non Gouan. E. lo 
Scheele in Linnzea, 22, p. 152. Western Texas; Wright (No. 1822); Lindheimer (No. 529 and 608) gine [192] 
mond (coll. II. No. vas If £. peploides, Gouan, of Southern Europe should prove to be a distinct species, 
Scheele’s name must stand for ours. 
Bi cilpessones BRACHYCERA, 7. sp.: annua (?), multicaulis, ramosa, erecta, glaberrima; foliis in petiolum bre- 
angustatis lanceolatis seu lineari -lanceolatis acutis mucronatis ; umbella 3-fida seu raro 4-5-fida ; ramis 
hisios bi bifidis ; ener nferioribus ovato-lanceolatis superioribus segs etangcir Neil a brevis- 
sime obtuseque cornutis; seminibus majusculis ovatis maculis irregula sepe confluentibus leviter impressis. 
Western New Mexico; Wright (No. 1821). Many stems a foot high cae: a ple but apparen oe annua ce or biennial 
root ; leaves 6-9 lines long, about 2 lines wide, patulous (not erect as in F. esuleformis) regularly lanceolate ; upper 
part of the stem quite ramose ; horns shorter than in any of our species, and sometimes almost rudimentary. d 
1 line in length, similar to those of EZ. sealer montana and Remeriana. 
is, glaberrima; caulibus pluribus ascendentibus ; foliis brevibus lanceolatis 
subsessilib riaceis glaucis ; bracteis 
EvPHORBIA MONT. n. sp.: peren 
ovatis obovatis seu ee ED acutis seu obtusis basi subinde subcordatis ilibus co 
omnibus SS rarius subcordatis, superioribus subinde transverse ovato-triangularibus, omnibus 
cuspidatis ; glandulis semilunatis, cornubus triangulatis brevibus; seminibus maculis plus minus impressis obscuris 
confuentibus ‘adios notatis. 
GRACILIOR: caule tenuiori; foliis minoribus suborbiculatis obovatis seu lanceolatis. 
