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BOTANY. 



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^ • i'^or. Abyssin. Western Texas, San Pedro ; Wr igJi t, ^o. ISil. On the Cimaron ; Fendler^ 



No. 794. Eagle Springs ; Bigeloio. 



Euphorbia ACUTA (nov. spec): pereonis^ multicaulis, erecta, foliosa, liirsuta; foliis e basi 

 obtiisa suba^quali lanceolatis acutatis cartilagineo-mucronatis supra nudis ; stipulis filiformibus 

 mox deciduis ; anthodiis versus caulis apicem alaribus s, pseudoaxillaribus sparsis ; involucris 

 liemisphfBvicis appendicibus truncatis crenatis lobatisve ; stylis patulis ultra medium bilobiSj 

 ovario cano longioribus capsula cana; seniinibus subcubicis acutis acute angulatis ln?vibus. 

 Stony prairies western Texas, along the San Pedro and Pecos rivers, &c.; Bigeloio^ Schott. (No. 

 1739 and 1749, Wright,) Stems ^-l foot high; stiff rigid, leaves 6-10 lines long, 3-6 

 lines wide, well characterized by the very acute point ; seeds 1 line long. 



Euphorbia angusta (nov. spec.) : perennis^ erecta, elatior, rigida ; foliis lanceolato-linearibus 

 basi acuta subeequalibus acutis integris demum glabratis ; stipulis subulatis minutis deciduis ; 

 anthodiis pseudoaxillaribus sparsis ; appendicibus truncatis crenatis sa'pe bilobis erectis ; stylis 

 brevibus erectis apice bilobis; capsula cana acutangula; seminibus ovato-cubicis acutangulis 

 transverse rugosis foveolatis. In rocky places western Texas ; Lindheimer^ No. 694 ; Wright^ 

 No. 1828. On the Rio Grande ; Schoit, Erect, 6-15 inches high ; several stems form a large 

 black perennial root with few or numerous elongated branches ; leaves (qw, 6-15 lines long, 

 1-2 lines wide. Seeds 0.8 line long, strongly marked. 



Euphorbia Florida (nov. spec.) : annua, erecta, patulo-ramosa, glaberrima ; foliis lanceolato- 

 linearibus sen linearibus in petiolis attenuatis serrulatis mucronatis ; stipulis lineari-subulatis 

 saepe 2-3-fidis ; involucris alaribus in cymulas terminales laxas congestis; pedunculis petiolum 

 longe superantibus ; lobis involucri ovatis acutis seu acuminatis ciliatis seu rarius laceris ; ap- 

 pendicibus magnis (involucro ipso majoribus) orbiculatis seu ovatis petaloideis integris ; stylis 

 ovarium teoLuantibus seu superantibus basi coalitis ad medium seu ultra bifidis ; stigmatibus 

 filiformibus ; capsula obtuse angulata ; seminibus subcubicis acute angulatis la^vibus transverse 



I 2-costatis. Sonora; Wrigld^ (N 



Stem i-1 foot high; leaves 12-18 



lines long, 1-1^ line broad ; margin revolute, and serratures thereby often invisible. Involucre 

 ■with large bright white appendages, 3 lines in diameter. 



Euphorbia trachtsperma (nov. spec.) : annua, erecta, glaberrima ; foliis e basi sub^equali 

 obtusa seu angustata oblongo-lanceolatis serratis mucronatis ; stipulis filiformibus seu subulatis 

 setaceo-fissis ; anthodiis alaribus demum in cymulas paucifloras terminales s. laterales confertis ; 

 appendicibus angustis albis ; stylis ultra medium bifidis ; capsula obtusangula; seminibus sub- 

 cubicis faciebus laBviusculis, angulis acutis crenatis asperatis. San Pedro ; Sonora, 

 No. 1832. Slender, erect, about 1 foot high, branches erect, fey^ ; leaves 9-12 lines long, 2-3 

 lines broad ; seed 1 line long. 



Euphorbia exstipulata (nov. spec.) : annua, erecto-patula, ramosa, glabriuscula seu minute 

 sparsimque aspera ; foliis lanceolatis seu lanceolato-linearibus argute serratis basi fequali in 

 petiolem brevem angustatis ; stipulis subnullis s. glanduliformibus ; anthodiis alaribus solitariis ; 

 pedunculis petiolo brevioribus ; appendicibus anticis plerumque 2-lobatis, posticis majoribus 4- 

 lobatis ; stylis ovarium ad angulos scabrum aB^uantibus, profunde bipartitis ; stigmatibus 

 filiformibus ; seminibus magnis subcubicis verrucosis et transverse 2-3-costatis. Western 



) 



Fendler^ (No. 790.) Sonora ; Thurher^ Bigeloio^ 



Parry, Stem about 6 inches high; leaves about 1 inch long, 1-2 rarely 3 lines wide, some- 



times not absolutely opposite, but a little separate ; seed 1 line long, with thick cross-ribs. A 

 transition form to the next sections. 



