28 PLANTS WRIGHTIAN^. - VI. 



MicRORHAMNUs ERicoiDES, Gray, PI. Wright p. 34. Praii-ies between Howard's 

 Creek and Live Oak Creek, Western Texas, May ; also between the Limpio and 

 the Rio Grande. (922.) — The specimens are loaded with the fruit, which has been 

 described in the account of Mr. Wright's former collection. 



Karwinskia Humboldtiana, Zucc. ; Gray, PL Wright, p. 32. Limestone hills 

 in the Big Bend of the San Pedro River, Western Texas ; July. (1346.) 



Adolphia infesta, 3Ieisner; Gray, PL Wright. I c. Mountain valleys between 

 the Limpio and the Rio Grande, June ; in flower. (923.) 



Frangula Californica, Gray, Gen. lU. 2. j)- ITS; var. tomentella. Rhamnus 

 tomentellus, Benth. PL Haritv. p. 303. Ojo de Ga-vilan, beyond the copper mines, 

 New Mexico ; Aug. (924.) " Shrub 4 to 6 feet high." — In these specimens the 

 leaves are glabrous and bright green above, even when young, but are clothed be- 

 neath, as are the branchlets, with a fine and soft whitish pubescence. They are 

 mostly serrulate, as they also are in my specimen of Hartweg's No. 1686. From 

 Fremont's Californian collection, Dr. Torrey has specimens stUl more tomentose, 

 even on both sides of the leaves ; but I think that all these are merely varieties 

 of Hooker's Rhamnus oleifolius, which was earlier published by Eschscholtz, under 

 the name of Rhamnus Californicus. 



Sageretia Michauxii, Brongn. ; Gray, Gen. III. 2. t. 166. Rocky banks, east 

 of Santa Cruz, Sonora ; Sept. (925.) — The specimens, which are sparingly in 

 flower, appear to agree in all respects with those from Florida. I am not aware 

 that this species has been yet observed at any intermediate station. 



Ceanothus Greggii (sp. nov.) : divaricato-ramosissimus ; ramulis tomentoso- 

 puberulis ; foliis confertis ellipticis oblongisve integerrimis coriaceis crassis uniner- 

 viis glabellis subtus leviter penninerviis primum tomentulosis (3-5 lin. longis) ; 

 pedicellis pubescentibus (demum glabratis) flore albo paullo longioribus. — (Battle- 

 field of Buena Vista, Gregg ; in flower.) Side of movmtains near Frontera, New 

 Mexico, July ; in fruit. — Shrub 2-5 feet high, with very rigid branches. Pedicels 

 shorter than the leaves. Flowers small. Fruit about 2 lines in diameter. — I have 

 only poor specimens of this species. It bears considerable resemblance to small- 

 leaved forms of C. cuneatus, Nutt. ; but the leaves are not narrowed towards the 

 base, and the pinnate veins underneath are obscure. 



CELASTRACE^. 



MoRTONiA sempervirens. Gray, PI. Wright, p. 35. t. 4. Stony prairies, San 

 Felipe Creek, Western Texas ; May. (926.) — The flower, in all the species, is 

 articulated with the peduncle, just above the pair of bracts. 



M. scABRELLA (sp. nov.) : fruticosa ; foliis obovatis ovalibusve margine incrassatis 

 undique ramulisque hispidulo-scabris ; petalis et disco margine fere integerrimis ; 

 calyce fructu ovali-oblongo dimidio breviore ; stylo breviusculo. — Mountain-sides, 

 near the San Pedro, Sonora, Sept. ; in flower and fruit. Mountains near El Paso, 

 April ; in flower. (927.) — Stems 2 to 4 feet high, much branched. Leaves 3 or 

 4 lines long, and 2 or nearly 3 lines wide, very obtuse, seldom mucronulate, very 

 thick and with a thickened margin, rough with a short and close pubescence which 



