139 [7] 
ad 
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, x. sp. Branches glabrous; spines in 
pairs, slender, short, straight, pinne a single pair; leaflets about 4 
pairs, oblong, somewhat coriaceous; 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 Frémont’s 2d report, but 
differs in its shorter, broader, and less numerous leaflets. 
Schrankia uncinata, Willd. On the Arkansas, where it is called 
Sensitive vine. 
Darlingtonia brachyloba, DC. With the preceding. 
Several other Mimosee are in the collection, but the specimens ~ 
are mostly without leaves and flowers. ie 
Cassia chamecrista, Linn. On the Arkansas. 
ROSACE. 
Cerasus ilicifolius, Wuét. Mountains of California. The kernel 
of the fruit has a strong flavor of bitter almonds. 
Geum Virginianum, Linn. On the Arkansas, 
Fallugia paradoxa, Endl. gen. 6385, Sieversia paradora, Don in 
Linn., trans. 14, p. 576, ¢. 22. A remarkable rosaceous shrub, with 
white flowers, and very long slender plumose tails to the carpels. 
It differs, in some respects, from Endlicher’s character of the genus, 
but I have not had an opportunity of comparing it with Don’s de- 
scription and figure. It was found in various parts of the valley 
- _ of the Del Norte. Can it be Geum dryadoides, DC.? 
~ Gercocarpus parvifolius, Wutt, Torr, and Gr., fl. 2, p. 427. A 
shrub about 12 feet high, with numerous straight branches’ spring’ 
ing from near the ground. The carpels, with their long plumose— 
irally contorted awns, bore into the earth, after they have fallen. 
_ The action of the wind communicates to them a twisting motion, 
and retrorse pubescence retains them in the soil. i dee eae 
3 Spiraea Californica, n. sp. Shrubby; leaves ovate, lanceolate, 
_ undivided, nearly glabrous, glandularly serrate, conspicuously pe- 
_tiolate; dowers in compound corymbs, perfect, calyx- ts” 
ad, about as long as the tube; disk coherent with the tube of ~ 
calyx; stamens numerous; carpels 5, distinct, ved; seeds 
