480 PROCEEDINGS OF THE AMERICAN ACADEMY. 
or slightly toothed showy appendages, these on the outer surfaces at the 
base a deep wine color, above which is an area of purple or deep 
rose color, and this again tipped with white: ovary rather long-stiped, 
glabrous; styles bifid, about three fourths free, somewhat thickened: 
capsule obtusely triangular, 6 mm. long, 5 to 6 mm. in diameter: seeds 
ecarunculate, tetragonal, slightly roughened, 4 mm. long. — Collected 
by C. G. Pringle on dry calcareous bluffs near Tehuacan, 29 August, 
1897, no. 6682. 
Euphorbia (Cyttarospermum) violacea. Perennial, dichot- 
omously branched from the base, 1 to 3 dm. high: stems and branches 
more or less angled and striate, glabrous or with a few scattered hairs, 
hispidulous at the nodes: nodes from 1 to7 em. distant: upper leaves 
opposite, the lower alternate, narrowly oblong or oblong-lanceolate, 1 to 
4.5 em. long, 2 to 8 mm. broad, glabrous or nearly so above, scattered 
hirtellous-pubescent beneath, acutish, entire, hispidulous on the margins, 
narrowed or attenuate at the base into a rather broad thickish petiole; 
petioles 2 to 10 mm. long; stipules glandular: inflorescence in terminal 
pedunculate cymes: bracts minute, pubescent: involucres turbinate, 
somewhat pubescent on the outside, greenish violet to almost black, 
with 5 oblong laciniate-truncate lobes, and 5 glands; glands oblong 
with oblong-rotund violet-colored white-margined appendages, 1 mm. or 
more in length: ovary long-stipitate, glabrous; styles 2-parted to the 
base: capsule obtusely triangular, 3 mm. in length, slightly broader than 
long; seeds ecarunculate, ovate, foveate, 2 mm. long. — Collected by 
C. G. Pringle on limestone hills near Tehuacan, altitude 2000 m., 30 
August, 1897, no 6681. 
A well marked species, readily recognized by the beautifully violet- 
colored involucre and glandular appendages. oe 
Euphorbia xylopoda. Much branched from a woody perennial 
base, 2 to 9 dm. high, glabrous throughout: stems terete, subglaucous: 
cauline leaves alternate, the uppermost subverticellate, elliptic or oblan- 
ceolate, 1.5 to 4.cm. long, 5 to 12 mm. broad, acute or acutish, mucro- 
nate, entire, narrowed below to a short petiole, light green above, paler 
and almost glaucous beneath ; petioles 2 to 5 mm. in length; stipules 
reduced to minute glands: involucres terminal, solitary, sessile, glabrous, 
5-lobed, subtended by about three ovate or obovate short-acuminate much 
‘duced more or less colored floral leaves, ciliated at the base; lobes 
broad, dentate-fimbriate ; glands 5, oblong, sessile or nearly so, exappe”” 
diculate: ovary 3 mm. long, glabrous; style 3-parted; stigmas 2-lobed, 
fleshy: mature capsule depressed, obtusely triangular, about 7 mm. long; 
