) oe Ie a a ee 
EUPHORBIACEZ OF THE MEXICAN BOUNDARY. 435 
lines broad, sharply and coarsely serrate; seeds larger than in all the foregoing species, 0.8 line long, remarkably 
angled, 
EvPHORBIA VILLIFERA, Scheele in Linnea, 22, p. 153, Western Texas; Berlandier, 2084; Lindheimer, 530; 
Wright, Thurber, In various parts of Mexico; Gregg. Root annual, stems erect, often a foot high. 
siamese i HYPERICIFOLIA, Linn. Sp. 1, p. 454. New Mexico; Wright (No. 1842 in part). eemromeset 
e true Linnean plant probably comes from the West Indies and other tropical countries, and has 
vl see froin Florida by Dr. Chapman. It is distinguished by smaller anthodia, generally disposed in denser Rea 
ters, smaller capsules, and smaller, paler seeds. The common North American form, which has also been collected 
abundantly along the boundary, has larger and more scattered anthodia, larger capsules and larger blackish seeds, and 
may be dictingstabed as var. communis, as it seems to be the more common form throughout the warmer countries 
around the whole globe. 
UPHORBIA PILULIFERA, Linn. 8. DISCOLOR: diffusa ; foliis e basi valde obliqua ovatis subrhomboideis acutius- 
culis serratis, peated stipulis subulatis, nang parvula pilosa, seminibus minutis ovatis acutis undulato- 
tuberculatis. Sonora; Thurber. Wright, No. 1842, in part. Mr. Blodgett found it in Florida. Stems }-1 foot long, 
Leaves 1-14 inch hits differs in shape and color of leaves from the stat forms of E. pilulifera; hair of the stem, as 
in all forms of this seca yellow and jointed ; involucre only } line long; heads 3-4 lines in diameter; seed scarcely 
more than } line long. 
EUPHORBIA CAPITELLATA, N. sp.: annua, iad seu demum diffusa ; caulibus elongatis puberulis, foliis 
e basi valde obliqua oblongo linearibus subnudis argute serrulatis mucronatis; stipulis lanceolatis ris ; glomerulis 
densifloris terminalibus fere aphyllis; involucri cnemen Sear stipitatis, appendiculis orbiculatis s. late obovatis 
integris; stylis ovario hirto longioribus ad medium bifidis; stigmatibus filiformibus ee eapsula puberula; 
seminibus ovatis acutatis iain suse selects Valleys at San Bernardino, Son Wright (No. 1849). 
Stems 6-10 inches long ; leaves 6-8 lines long, 2 lines wide ; heads white, showy, 4~6 lines in : Bain r. 
EUPHORBIA PYCNANTHEMA, ”. sp.: perennis, erecto- patula, pene ae ns; foliis e basi lata obliqua 
cordata ovatis s. oblongis obtusiusculis seepe mucronulatis in tegris 8. roses latis, scabris; stipulis Janceolatis fissis; 
Sheaiseite terminalibus multifloris quasi involucratis ; involucris pilosu panes) is) late seh manele csr eta 
seu boas: subnudis; stylis fere ad basim patulis; peer pear clavellatis; ca bosa 
pa nte; seminibus acute angulatis transverse rugulosis aereet all Sah gions near e fiat Maria, 
Ciahesties Wright. Numerous stems 6 inches high, from a thick lign bes ae s 4-5 lines long. General 
appearance of a ane labiate plant with sar involucrate heads. Similar in many eit to the last, but more 
erect, more hairy, leaves shorter. Remarkable for the different involucres on the same head, reminding one of 
Hydrangea or some fae llifera 
EvupPHorRBIA LATA. ZF. didatata, Torr. & Gray, Bot. Pope’s Rep. p. 19; non Hochst. in Richard. Flor. [189] 
Abyssin. Waste Texas, San Pedro ; Wright, No. 1841. On the cite Fendler, No. 794, Eagle Springs ; 
Bigelow. 
EvpPHOoRBIA ACUTA, ”. sp.: perennis, multicaulis, erecta, foliosa, hirsuta ; foliis e basi obtusa subsequali lance- 
olatis acutatis cartilagineo-mucronatis supra nudis; stipulis filiformibus mox deciduis; anthodiis versus caulis api- 
cem alaribus s. eae toomaad sparsis ; involucris sie fe ag ee truncatis crenatis lobatisve ; stylis 
patulis ultra medium bilobis, ovario cano longioribus capsula cana ; seminibus subeubicis acutis gulatis levi- 
lus. Stony sch Western Texas, along the San Pedro and Pecos rivers, &c.; Bigelow, Sihoes (No. 1739 and 
1749, Wright.) Stems 4-1 foot high; stiff ried, leaves 6-10 lines long, 3-6 lines wide, well characterized by the very 
acute point; seeds 1 line long. 
EUPHORBIA ANGUSTA, 7. sp.: perennis, erecta, elatior, rigida ; foliis lanceolato-linearibus basi acuta subeequal- 
ibus acutis integris demum glabratis ; stipilla subulatis minutis deciduis ; anthodiis pseudoaxillaribus sparsis ; appen- 
dicibus truncatis crenatis sepe bilobis erectis; stylis brevibus erectis apice bilobis ; capsula cana acutangula; seminibus 
ovato-cubicis acutangulis transverse rugosis foveolatis. In rocky places Western Texas; Lindhetmer, No. 69°; 
Wright, No. 1828. On the Rio Grande; Schott. Erect, 6-15 inches high; several stems form a large black per- 
ennial root, with few or numerous elongated branches; leaves few, 6-15 lines long, 1-2 lines wide. Seeds 0.8 line 
long, strongly marked. 
EUPHORBIA FLORIDA, ”. sp.: annua, erecta, patulo-ramosa, glaberrima ; ar lanceolato-linearibus seu line- 
aribus in petiolis attenuatis eoclatia mucronatis ; stipulis lineari-subulatis sepe 2-3-fidis ; involucris alaribus in eym- 
ulas terminales laxas congestis; pedunculis petiolum longe superantibus ; lobis involucri ovatis acutis sen acuminatis 
ciliatis seu rarius laceris ; appendicibus magnis (involucro ipso Gases orbiculatis seu ovatis petaloideis integris ; 
stylis ovarium squantibus seu superantibus basi coalitis ad medium seu ultra bifidis; stigmatibus filiformibus ; 
— obtuse —— seminibus subcubicis acute angulatis Jevibus transverse 2-costatis. Sonora; Wright (No. 
~ 
