192 UNITED STATES AND MEXICAN BOUNDARY. 



(No. 529 aDcl COS ;) Drummoiid, (Coll. II, No. 331.) If E. peploicles, Gouan, of Southern 

 Europe should prove to be a distinct species, Scheele's name must stand for ours- 



EurnoRBiA brachycera (nov^. spec): annua (?), multicaulis, ramosa, erecta, glaberrima; foliis 

 in petiolum hrevissimum angustatis lanceolatis seu lineari-lanceolatis acutis mucronatis ; umbella 

 3-fida seu rare 4-5-fida; ramis pluries bifidis; bracteis inferioribus ovato-Ianceolatis superioribus 

 rbombeo-orbiculatis mucronatis; glandulis brevissime obtuseque cornutis; seminibus majusculis 

 ovatis maculis irregularibus s^pe confluentibus leviter impressis. Western New Mexico; Wright^ 

 (No. 1821.) Many stems a foot high from a stout but apparently annual or biennial root; 

 leaves 6-9 lines long, about 2 lines wide, patulous (not erect as in E. esuliBformis) regularly 

 lanceolate ; upper part of the stem quite ramose ; horns shorter than in any of our species, and 

 sometimes almost rudimentary. Seed 1 line in length, similar to those of E. esul^formis, 

 montana and Roemeriana. 



EuPHOEBiA MONTAiN-A (nov. spec.) : perennis, glaberrima; caulibus pluribus ascendentibus ; foliis 

 brevibus lanceolatis ovatis obovatis seu suborbiculatis acutis seu obtusis basi subinde subcordatis 

 subsessilibus coriaceis glaucis ; bracteis omnibus orbiculato-triangularibus, rarius subcordatis, 

 superioribus subinde transverse ovato-triangularibus, omnibus cuspidatis ; glandulis semilunatis, 



mmus 



undique notatis. 



a gracilior: caule tenuiori ; foliis minoribus suborbiculatis obovatis seu lanceolatis. 



/3roeusta; caule robustiore ; foliis bracteisque majoribus crassioribus late ovatis seu ovato- 

 cordatis. 



The var, a in New Mexico ; Fendler, (No, 786 ;) Wright, (No. 661, 1825.) San Luis 

 Mountains, Sonera ; Capt. E. K. Smith, Stems 4-8 inches high, leaves 2-3 lines long, in 

 young specimens imbricate and red. 



Var. j9, on the upper Platte ; James^ Nuttally Fremont ; is a much stouter plant. Leaves 5-6 

 lines long, seeds larger. Dr. Wislizenus collected intermediate specimens near Albuquerque. 



Euphorbia crenulata (nov. spec.) : annua, erecta, glaberrima ; foliis obovatis acutis in basia 

 attenuatis minute crenulato-serrulatis mucronatis ; umbella S-fida^ bracteis inferioribus late 

 ovatis acutis, superioribus transversis, omnibus tenuiter serrulatis mucronatis ; involucri 

 glandulis longe tenuiterque cornutis ; seminibus ovato-subglobosis cinereo-fuscisj maculis 

 obscurioribus irregulariter confluentibus parum impressis. California; Hartiveg, (1950.) Near 

 Monterey ; Dr. Parry. About 1-2 feet high, simple or branching above ; leaves about 9 lines 

 long, 5 lines broad, involucells broader and shorter ; seed nearly a line long, unusually dark 

 for this section. One of the very few, peploid Euphorbias with crenate leaves. 



Euphorbia esul^formis, S. Schauer in Linnceay 20, jp. 729. Near the Copper Mines, New 

 Mexico ; Wright^ (No. 1820 ;) Bigeloto. On the Nueces, western Texas ; Wright. San Luis 

 Mountains, Sonora ; Capt. E. K. Smith. This species seems to be scarcely distinguishable from 

 the Mexican E. campestris ; SchlechtendaL The original specimen of the latter, however, has 

 longer and more slender horns ; the seeds are wanting. The original specimen of E, esuheformis 



has similar but smaller seeds than our plant ; the horns are also very short and incurved, the 

 gland itself is truncate and notched. Euphorbia brachycera and E. montana come very near to 

 this species. 



Var? subde:ntata: foliis oblongo-Iinearibus brevissime petiolatis, inferioribus integris obtusis, 



mucronatum 



m 





