OF ARTS AND SCIENCES. 173 



112. Folia pinnata Palmar cujusdam. 



113. COMMELYNA ViKGINICA, Linn. 



114. Anthephora elegans, Schreb. Gram. 2, t. 44. 



115. Cenchrus tribdloides, Linn., var. (7. paucijiorus, Benth. 

 Bot. Voy. Sulph. p. 56. G. echinatus, Benth. PI. Hartw. no. 246. 

 Apparently not distinct from the common plant of the eastern side of 

 North America. 



116. Muhlenbergia calamagrostoides, H. B. K., ex Benth. PI. 

 Hartw. p. 347. M. longiseta, Benth. 1. c. p. 28. 



117. Bouteloua polystachya, Thurber. Ghondrosium polysta- 

 chyum, Benth. Bot. Voy. Sulph. p. 56. G. suhscorpioides, C. Miill. in 

 Bot. Zeit. 1856, p. 347. To this belongs no. 754 and 2021 of 

 Wright's Texano-New-Mexican collection, and 792 of Coulter's Cali- 

 fornian collection. 



118. Dactyloctenium ^gyptiacum, Willd. 



119. Gram. nov. of uncertain genus, the single specimen mislaid. 



120. ViLFA Virginica, p. de Beauv. Only sterile plants. 



121. Brizopyrum spicatum, Hook. & Am. Bot. Beech. Voy. p. 

 403 ; Munro in Benth. PI. Hartw. p. 342. Female specimens with 

 the spikelets an inch and a half long, quite unlike any Uniola spicata, 

 Linn., met with on the eastern coast of the United States. 



Euphorbia schizoloba (Engelm. in Lieut. Ives's Rep.) : perennis, erecta, gla- 

 berrima, glaucescens ; foliis breve ovatis integris breviter cuspidatis in petiolum 

 breyem attenuatis ; umbellae trifidse bracteis inferioribus rhombeis, superioribus 

 transversis cuspidatis ; involucri glandulis stipitatis crenatis incisisve nee cornutis, 

 lobis glandulosis eraarginatis ; stylis ovario longioribus basi connatis. — East of the 

 Lower Colorado, lat. 35°, alt. 2000 feet. Dr. J. S. Newberry, in Lieutenant Ives's 

 Exped., March 26, in flower. — Amply distinguished from E. montana and other 

 allied species by the peculiar shape of the glands and lobes of the involucrura. 

 Stems 8-12 inches high. Leaves 5-7 lines long and 3-4 lines wide. Fruit and 

 seeds unknown. 



Euphorbia lurida (Engelm. 1. c.) : perennis, multicaulis, glaberrima, junior 

 tota lurida ; foliis oblanceolatis integris basi angustatis subsessilibus patulis ; um- 

 bellffi 5-fid8e bracteis cuspidatis, inferioribus obovatis, superioribus suborbiculatis ; 

 involucri glandulis transversis crenatis, lobis ovatis membranaceis ; stylis ovario 

 multo brevioribus vix basi connatis. — Base of the San Francisco Mountains, lat. 

 35°, alt. about 7000 feet ; in flower at the end of April. Dr, J. S. Newberry. — 

 From the nearly allied E. esuloeformis it is distinguished by the absence of horns on 

 the glands, &c. Stems of the very young specimens six inches high. Leaves 5 to 

 8 lines long and 1^ to 2 lines wide. Fruit and seeds unknown. 



