ZUfil AND COLORADO RIVERS. 159 



Cowania Stansburyana, Torr., in Stansbury's report, t. 3, with the preceding ; 

 October, (flower and fruit.) 



This species is readily distinguished from C. JMexicana, which it much resem- 

 bles, by the pinnatified leaves. 



Fallugiajmradoxn, Torr., in Emory's report, p.—, t. 2, Gray, PI. Fendl., p. 41; 

 PI. Wricht. 1, p. 68. On the Zuni and Yampai creek; November, (flowers and 

 fruit.) 



Potentilia diffusa, Gray, PI. Fendl., p. 41. Zuni mountain ; August. 



liorkelia ? multifoliolata, sp. nov.; glabrescens; follis radicalibus 51-81 foliola- 

 tis; foliolis lato-obovatis approximatis, apice 2-4-lobis, vcl subintegris ; petalis 

 oblongo-cuneiformibus ; staminibus 20 ; carpellis paucis. Western borders of 

 New Mexico ; October. 



A remarkable species, nearly allied to one collected in Northern California, by 

 the botanist of Captain Wilke's exploring expedition. From Horkelia it differs 

 in its numerous stamens and filiform filaments ; from Potentilia in its companulate 

 calyx and narrow unguiculate petals ; from both in its few carpels, which seldom 

 exceed six in number. 



Photinia arbutifoti.i, Lihdl. ; Torr. and Gray, Fl. 1. p. 473. Western borders 

 of New Mexico; October, (fruit.) 



The leaves, in our only specimen, are rather obtuse, and slightly serrate. The 

 fruit contains but one perfect seed. 



Rosa blanda, Ait. ; Torr. and Gray, Fl. 1, p. 459 ; var. ? Nearly glabrous ; 

 leaflets mostly 9 ; prickles scattered, slender, slightly curved. Western borders 

 of New Mexico. Our specimens are without flowers or fruit. 



ONAGRACEjE. 



Epilobium co'oraium, Muhl. ; Torr. and Gray, Fl. 1, p. 489. Laguna creek 

 and Zuni mountains : August ; in flower and fruit. 



OEnothera biennis, Linn. ; Torr. and Gray, Fl. 1. p. 492 ; Yampai creek ; Octo- 

 ber : in fruit. 



(E. coronopifolia, Torr. and Gray, Fl. 1, p. 495; Gray, PI. Fendl., p. 43. 

 Yampai creek ; October. 



(E. Harticegi, Benth. PI. Hartw., p. 1, var. foliis angusto linearibus. Little 

 Colorado. September. 



Gaura coccinea, Nutt. ; Torr. and Gray, Fl. 1, p. 518. Near the puebla of La- 

 guna -. Ausjust ; in fruit. 



LOASACE.E. 



Mentzelia (Bartonia) mxdtiflora, Nutt. PI. Gamb., p. 180 ; Gray, PI. Fendl. 

 p. 48, and PL Wright. 1, p. 74. Western part of New Mexico. The only 

 specimen is in fruit ; which is urecolate turbinate. 



