139 [ 7 ] 



Dalea Formosa, Torr . in Ann. lye. JY. York, 2. p. 178. This 

 beautiful species was first detected by Dr. James, in Long's first 

 expedition. It is a shrub about three feet high, with numerous 

 crooked branches, and purplish flowers. Near Santa Fe, and val- 

 ley of the Del Norte. 



D. alopecuroides, Willd. With the preceding. 



D. laxiflora, Pursh. Valley of the Arkansas. 



Besides these Daleae, there were two other species, both shrubby^ 

 in the collection; but I have not ascertained whether they may not 

 be already described. One of them is densely branched; the 

 leaflets are in six to seven pairs, broadly obovate connate about 

 3 lines long, glabrous above, very villous, and furnished with 

 large dark colored glands toward the margin underneath; they are 

 obscurely toothed. The flowers are in short dense spikes; calyx 

 with plumose subulate-setaceous teeth, which are as long as the 

 tube. This species was found on the Gila river. It is very near 

 D. ramosissima, Benth. in Bot. Sulph., p. 11., t. 10. 



The other species is canescently tomentose,and diffusely branched. 

 The leaflets are narrowly oblong, in three to four pairs, which are 

 distant. On both sides they are sparingly furnished with small red 

 glands, which are nearly concealed in the down. The flowers are 

 in short loose spikes, small, purple. Calyx-teeth subulate, shorter 

 than the tube, plumose. Found on the great desert west of the 

 Colorado. 



Petalostemon grac.ile, S. oligophylum. Stem erect; leaflets 

 in 2 — 3 linear, slightly dotted underneath; calyx glabrous, longer 

 than the subulate bracts, the teeth very short, ovate; petals oblong. 

 Valley of the Del Norte. 



Prosopis glandulosa, Torr. in Jinn, Lye. JY. York, 2. p. 192, t. 2. 

 (mezquite.) Abundant in the valleys of all the rivers, from Santa 

 Fe, west. The trunk of this tree is sometimes 14 inches in diam- 

 eter. The pods are long, flat, and filled with a sweetish pulp. 

 They are excellent food for horses and are sometimes used by men 

 in times of scarcity. 



P. (Strombocarpa) Emoryi, n. sp. Branches glabrous; spines in 

 pairs, slender, short, straight, pinnge a single pair; leaflets about 4 

 pairs, oblong, somewhat corriaceous; the under surface and the 

 petioles somewhat pubescent; legume spirally twisted into a com- 

 pact cylinder. Found in fruit only; on the Gila river. This spe- 

 cies is nearly allied to the P. odorata of Fremont's 2d report, but 

 differs in its shorter, broader, and less numerous leaflets. 



Schrankiauncinata, Willd. On the Arkansas, where it is called 

 sensitive vine. 



Darlikgtonia brachyloba, DC. With the preceeding. 



Several other Mimosese are in the collection, but the specimens 

 are mostly without leaves and flowers, 



Cassia chamjecrista, Linn. On the Arkansas. 



ROSACEA. 



Cerasus ilicifolit*3, JYutt. Mountains of California. The kernel 

 of the fruit has a strong flavor of bitter almonds. 



