EUPHORBIACEAE. 



[Vox,. II. 



28. 



Euphorbia commutata Engelm. Tinted Spurge. (Fig. 2334.) 



Euphorbia commutata Engelm. in A. Gray, Man. Ed. 



2, 389- 1856. 

 Euphorbia Ohiolica Steud. & Hochst.; Boiss. in DC. 



Prodr. 15: Part 2, 142. 1862. 



Biennial, yellowish green, often tinged with red, 

 glabrous. Stem slender, usually decumbent at the 

 base, 4/-I5' long, branched, topped by a 3-rayed 

 umbel; branches forked or umbellately branched; 

 leaves, except the whorl at the base of the umbel, 

 scattered, spatulate to ovate, J^'-i^' long, obtuse 

 or mucronulate, entire, flat, narrowed into a slender 

 petiole; bracts opposite, ovate- reniform; involucres 

 catnpanulate, \\" long, sessile, bearing 3 or 4 

 crescent-shaped unappendaged glands prolonged 

 into slender horns; capsule globose-ovoid, i 1 /*" in 

 diameter, glabrous, the lobes rounded; seeds oblong, 

 terete, irregularly pitted. 



On hillsides, chiefly along streams, Pennsylvania to 

 Minnesota, Florida and Missouri. March-July. 



29. Euphorbia Esula L. L,eafy 

 Spurge. Faitour's Grass. (Fig. 2335.) 



Euphorbia Esula L,. Sp. PI. 461. 1753. 



Perennial by a horizontal rootstock, glabrous. 

 Stems often clustered, slender, mostly erect, 

 8'-2 tall, scaly below, branched above, topped 

 by a many-rayed umbel; leaves few, all scattered, 

 except the whorl at the base of the umbel, linear 

 or oblong, 7"-2o" long, 2"-6" broad, entire, 

 sessile; those subtending the umbel lanceolate 

 or oblanceolate ; bracts subreniform, mucron- 

 ate; involucres catnpanulate, \}"-\W long, 

 nearly sessile, bearing 4 unappendaged crescent- 

 shaped glands; capsule nodding, smooth; seeds 

 oblong, terete, smooth. 



In waste places, Massachusetts to New York and 

 Michigan. Also called Tithymal. Naturali/.ed from 

 Europe. Summer. 



Euphorbia Nicaeensis All. 



Nicaean Spurge. (Fig. 2336.) 



Euphorbia \icaeensis All. Fl. Fed. i: 285. pi. 



69. f. i. 1785. 



Perennial by a horizontal rootstock, bright 

 green, glabrous. Stem rather stout, usually 

 clustered, erect or assurgent, S'-2O / high, 

 usually very leafy, simple or branched, 

 topped by a 4-/-rayed umbel; branches sim- 

 ple or forked; leaves, except the whorl at the 

 base of .the umbel, alternate, linear or linear- 

 oblong, %'-!%' long, 2 // -6 // broad, entire, 

 mostly apiculate, sessile, revolute-margined, 

 those subtending the umbel ovate, oval or 

 obovate; bracts opposite, reniform, obtuse or 

 apiculate; involucres campanulate, i 1 /*" 

 long, sessile, bearing 4 yellowish oblong 

 crescent-shaped, 2-horned, unappendaged 

 glands; capsule globose-ovoid, 2" in diame- 

 ter, nodding, smooth, finely wrinkled; seeds 

 oblong, iX // ~ I /^ // l n g> nearly terete, whit- 

 ish, smooth. 



In fields along the Susquehanna River, south- 

 ern New York and northern Pennsylvania. 

 Naturalized from Europe. July-Sept. 



