141 [ 7 ] 



CE. biennis, Linn. Valley of the Del Norte. 

 Several other undetermined species of (Enothera exist in the col- 

 lection. 



Gaura coccinea, Nutt. Tributaries of the Canadian. 

 G. parviflora, Dougl. Valley of the Del Norte. 



LOASACEiE. 



Mentzelia pumila, Nutt. Stem whitish, slender, branching, and 

 a little roughened above, smoothish and somewhat shining belowj 

 leaves pinnatifid, or sinuate-toothed; flowers (small) 2 3 together, 

 pedicellate; petals 10, lanceolate; stamens very numerous; the 

 outer filaments dilated; capsule turbinate-cylindrical; seeds nume- 

 rous, winged. Valley of the Del Norte. Plant about a foot high. 

 Flowers less than an inch in diameter. Capsule three-fourths of 

 an inch long, 3-valved at the summit. 



Cevalia sinuata, Lagasca. This interesting plant, which has 

 been admirably illustrated by Fenzl, occurs in many parts of the 

 valley of the Del Norte, from Santa ¥6 to Saltillo. 



CUCURBITACEiE. 



Cucumis, perennis, James, Torr, and Gr. On the Gila river, 

 abundant. We are yet uncertain of the genus of this plant, which 

 seems to be common in various parts of Mexico, particularly in 

 arid, sandy wastes. No specimens of the fruit have yet been sent 

 to us. There are three other undetermined Cucurbitacese in the 

 collection, distinct from any described in the Flora of North 

 America. 



CACTACE^E. 



Several interesting plants of this family were noticed by Colonel 

 Emory, but they cannot be satisfactorily described from dried 

 specimens. They are probably included among the numerous new 

 species of Mexican Cactacese soon to be described by Dr. Engle- 

 mann. 



CORNACE^E. 



Cornus paniculata, Viler. On the Arkansas. 



CAPRIFOLIACEiE. 



SyMPHORicARPus racemosus, Linn. (Snow berry.) On the Ar- 

 kansas. 



COMPOSITAE. 



Vernonia fasciculata, Michx. Bent's fort. 

 Liatris punctata, Hook. Rayada creek. 



Corethrogyne tomentella, Torr . and Gr . Jl . N. Jim. 2, p. 99. 

 Very abundant on the^Dordilleras of the Pacific, and called by the 



