172 PROCEEDINGS OF THE AMERICAN ACADEMY 



hemisphasrici extus intusque minute puberuli dentibus orbiculato-ovatis 

 fimbriatis dentatisve, glandulis 5 transversis bilabiato-cyathiformibus 

 appendice iis duplo latiore (alba seu rosea) orbiculata integra sufFul- 

 tis ; bracteolis paucissimis linearibus fimbriatis ; florura masculorum 

 numerosissimoi'um stipitibus demum exsertis ; flore foeraineo breviter 

 stipitato erecto glaberrimo ; stylis distinctis f bifidis ovario tequilongis ; 

 ramis clavatis divaricatis ; capsular coccis globosis ; seminibus ovatis 

 obscuris depresso-tuberculatis ecarunculatis. — Base of stem unknown, 

 probably fruticose ; the slender branches below ligneous ; internodes 

 2-3 inches long. Leaves very deciduous, on the branches in threes, 

 4-7 lines long [the larger almost an inch long], and 1 - li lines wide, 

 on a petiole less than a line long. Cyme l-H inches in diameter. 

 Involucres with the large appendages 4 or 5 lines wide. Bracteoles very 

 few (probably 5) outside of the 20 or 30 male flowers. Styles scarcely 

 half a line long. Capsule 2^ lines in diameter; cocci with a slight 

 groove on the back : seeds about 14 lines long, blackish-brown, cov- 

 ered with flattened tubercles. — Distinguished from the closely allied 

 Mexican E. peganoides, Boiss. Cent. Euph. p. 21, by the small size of 

 the bracts, the pubescence of the involucre, the shape of the glands, the 

 large and entire appendages, and the short stipe of the ovary. The 

 seeds of £J. peganoides are unknown."* 



* Notes to the EuphorbicB of the Botany of the Mexican Boundary Survey, by 

 tlic author, Dr. Engelmann. 



Page 185. E. petaloidea, y. Nuttaltii is distinguished by Mr. Boissier (Cent. 

 Euph. p. 10) under the name of E. zygophjlloiths, no doubt correctly. Another 

 of Mr. Boissier's new species, E. po/i/dada, from Texas, sent l)y Wright and Lind- 

 heimer, seems to be only a smaller flowered form of E. petaloidea with narrower 

 appendages and smaller seeds. 



P. 186. E. cinerascens, (i. appendiculata must give way to the earlier name of E. 

 melanadenia, Torrey in Bot AVhipp. p. 135. — E. cinerascens will have to be named 

 E. melanadenia, /?. suhinappendiculala. 



P. 187. E. inmquHatera, Sonder. A careful examination of the original speci- 

 men of £. serpyUifolia, Pers. Syn. 2, p. 14, preserved in Herb. De Candolle (a frag- 

 ment of which has been kindly communicated to me), proves that this is the type 

 of the American forms, referred by me to E. incequilatera ; they will therefore have 

 to bear Persoon's name. Mr. Boissier, discriminating perhaps too nicely, consid- 

 ers the Asiatic and African forms as distinct, and comprises them under the name 

 of E. sanguinea, Hochst., to which E. incequilatera and many other synonymes are 

 referred. 



The following two newTpecies, of the section Tithipmdus, were collected by Dr. 

 Newberry in the recent expedition under Lieutenant Ives : — 



