480 PROCEEDINGS OP 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 (Cyttarospermnm) violacea. Perennial, dichot- 

 omously brauched 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 to 7 cm. distant: upper leaves 

 opposite, the lower alternate, narrowly oblong or oblong-lanceolate, 1 to 

 4.5 cm. 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. 



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 

 reduced more or less colored floral leaves, ciliated at the base ; lobes 

 broad, dentate-fimbriate ; glands 5, oblong, sessile or nearly so, exappen- 

 diculate : ovary 3 mm. long, glabrous ; style 3-parted ; stigmas 2-lobed, 

 fleshy : mature capsule depressed, obtusely triangular, about 7 mm. long, 



