OF ARTS AND SCIENCES. 261 



ish, pubescent, I line long ; sepals ovate-lanceolate, acute. — S. Cali- 

 fornia to New Mexico. 



46. E. iNFLATUM, Torr. Taller, less branched, the stem and inter- 

 nodes longer and often inflated: pedicels 6 to 12 lines long: flowers 

 and akene twice larger. — S. California to Nevada and Arizona. 



47. ¥j. Gordoni, Bentli. A similar species, but glabrous through- 

 out, or the petioles slightly pubescent: flowers glabrous, light rose- 

 color : outer sepals ovate, the inner oblong. — Colorado. 



48. E. GLANDULOSUM, Nutt. Beset with short-stipitate glands : 

 leaves small, obovate, somewhat villous : involucres glabrous, half a 

 line long, turbinate-campanulate: flowers nearly a line long, slightly 

 hispid ; sepals oblong-ovate, acutish. — Collected only by Dr. Gambel, 

 probably in New Mexico. 



49. E. SCALARE. A peculiar allied species, collected in imperfect 

 specimens by Dr. T. H. Streets, U.S.N., at Canvas Point, on the coast 

 of Lower California. Main branches of the inflorescence slender and 

 glabrous, a foot long, with opposite or alternate brauchlets (sometimes 

 in threes), divaricate or ascending : bracts distinct, linear, a line or two 

 long, spreading or reflexed, on the branchlets smaller and erect : pedicels 

 scattered on the brauchlets, 1 or 2 lines long, filiform, ascending : in- 

 volucres narrowly turbinate, f line long, glabrous : bracteoles spatulate, 

 naked : flowers slightly pubescent, a line long ; sepals oblong, the inner 

 a little narrower. 



* » Perennial or biennial, the peduncles and inflorescence glabrous and leafless : 

 involucres and flowers larger, glabrous: akene 2 or 3 lines long. — (Spec, 

 of §§ Pedun'cclata & Alata, Bentli., Torr. & Gray.) 



•f- Perennial ; woody caudex much branched and leafy : densely white-tomentose. 



50. E. TEXELLU3I, Torr. Tall; branches of the caudex short and 

 crowded or elongated : leaves ovate or i-ouuded, tomeutose both sides : 

 inrtorQ^ceuce rather sparingly branched : flowers white or pinkish, be- 

 coming 1| lines long; outer sepals broadly obovate or orbicular, the 

 inner linear-oblong. — S. Colorado to W. Texas and New Mexico. 



■i- -4- Biennial (?) ; peduncle very sparingly branched : leaves all radical, villous. 



51. E. ciLiATUii, Torr. Leaves broadly spatulate, 2 inches long, 

 glabrous excepting the very villous margin and midrib : involucres 

 few, long-pedunculate : flowers deep red ; sepals ovate, acute, the inner 

 narrower. — Northern Mexico. 



52. E. ATRORUBENS, Engelm. Very similar: leaves narrowly lan- 

 ceolate, 4 inches long, on long petioles, villous, somewhat tomentose 

 beneatli : peduncle inflated : flowers deep red : akene somewhat winged 

 above with a thick narrow margin. — Chihuahua. 



