GREENMAN. — PHANEROGAMS, 479 
number of specimens of this species at hand show the foliage to be ex- 
tremely variable. The leaves are ovate, elliptic-oblong to linear, 2 to 
12 cm. long, 2 to 18 mm. broad, deeply incised-dentate (especially 
toward the base) to entire, usually with one or two larger divaricate tri- 
angular teeth at the base of the blade, which give the leaves a halberd- 
shaped appearance. The bicornute greenish appendages of the four 
glands of the involucre and the tetragonal seeds associated with the 
dichotomously branching glabrous stems, notwithstanding the strongly 
polymorphous character of the leaves, readily distinguish this species 
from E. heterophylla, L., with which it has been confused. The follow- 
ing specimens may be referred to &. lacera: Valley of San Luis 
Potosi, Schaffner, no. 859 (in the Gray Herbarium under £Z. heterophylla, 
+ Var.); Sierra de San Felipe, Oaxaca, altitude 2300 m., 11 Septem- 
ber, 1894, Pringle, no. 5619; at El Parin, Oaxaca, altitude 1230 m., 
3 October, 1894, Pringle, no. 5707; also Pringle’s no. 6685, collected 
on limestone hills near Tehuacan, altitude 2000 m., 30 August, 1897. 
EvupHorsia PROSTRATA, Ait. Hort. Kew. ed. 1, ii. 1389. To this 
Species may be referred Pringle’s no. 6436, Huphorbia ramosa, Seaton, 
var. villosior, Greenman, Proc. Am. Acad. xxxii. 297, also Pringle’s 
ho. 6683, collected on dry limestone ledges, Tehuacan, altitude 1540 m., 
27 August, 1897; both specimens correspond well with Parry and 
Palmer’s no. 818, Karwinski’s specimen from Mexico without further 
data, and also with other authentic material. . 
The Z. ramosa, Seaton (Proc. Am. Acad. xxviii. 121), is very closely 
allied to, if not specifically the same as ZL. prostrata, Ait., differing only 
in the glabrous capsules, and the less villous character of stem and 
leaves. The mature seeds in all the specimens mentioned above are 
» grayish, subquadrangular, somewhat furrowed, more or less transversely 
Tugose, and distinctly foveolate or honeycombed. The less mature 
Seeds are more apt to be reddish, and more distinctly furrowed. 
Euphorbia (Alectoroctonum) tricolor. Suffruticose, 1 m. or 
less in height: stems and branches covered with a grayish red bark, 
somewhat striated, puberulent on the young shoots; nodes 1 to 6 cm. 
distant: leaves petiolate, ternate, quaternate, or the uppermost opposite, 
oblong-ovate, 1 to 2 em. long, two thirds as broad, glabrous above, 
‘sparingly pubescent beneath, rounded at the apex, entire, cuneate at the 
base ; petioles pubescent, 4 to 8 mm. long; stipules glandular: inflores- 
“ence in terminal usually close cymes: involucre wine-colored or some- 
times greenish, strigillose-pubescent on the outer surface, also pubescent 
Within ; lobes laciniate; glands subbilabiate, bearing oblong-ovate entire 
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