APPENDIX. 365 



are said to use the dried and pulverized leaves as a condiment. The fruit is nearly globose, 

 about the size (tf an ordinary plum, and when ripe, (which is about the middle of July,) of a 

 dark purjde color. 



QuKRcus HiNDSir, Benth. Bot. Sulph. j). 55. Q. longiglanda, Torr. in Frem. Gcogr. Mem. 

 Q. Ransomi, KtUogg, in Proceed. Calif. Acad. h'at. Sc, p. 25.' With tlie next ; bearing its 

 long ripe acorns in October. 



QuERCUS CRASSiroci L.\ (n. sp. ) : foliis perennantibus coriaceis petiolatis oblongis acutis integer- 

 rimis v. parce acuteque dentatissubtus pubescentibusdemum glabris ; fructibus sessilibus, cupula 

 depresso-hemisjdierica crassissima, squamis latissimistoraentosis brevi-acuminatis glanda, ovata 

 glabra. (Tub. IX.) Tejon Pass. This handsome evergreen oak is usually but a middle-sized tree. 

 It is certainly very near Q. densiflora, H(Jok. it Am., of which I have no good acorns for compa- 

 rison. Tliat species (judging from the figure oi' Hooker, Jc, t. 380,) has smaller acorns, a thin, 

 hemispherical cup, and narrow scales. The leaves vary in size and form ; on young shoots they 

 are often sharply dentate. The cups are sometimes nearly an inch and a half in diameter, and 

 extremely thick, with a rounded margin. The scales are broader than long, and have a small, 

 abrupt point. The lower ones, and sometimes all of them, are more or less thickened and pul- 

 vinate, so that they give to the cup a tuberculate appearance. Gland often an inch ami three- 

 quarters long, obtuse, only a third or fourth part immersed in the cup. 



QuERcus AGRIFOLIA, Nee, in Ann. Sc. Nat. 3,^9. 371. Q. oxyadenia, Torr. in Sitgr. Rep. t. 17. 

 Q. acutiglandis, Kellogg, I. c. Bear caiion of the Sierra Nevada. We have elsewhere remarked 

 how variable are the leaves and acorns of this species. The acorns collected by Mr. Blake were 

 all elongated, and very acute. The plant generally forms low, scrubby bushes, but is sometimes 

 twenty feet high. 



QuERci's DouGLASii, Hoolc. & Am. Bot. Beech, p. 371; Hook. Ic. t. 382 and 383. Summit 

 of Tejon Pass. This belongs to the group that includes Q. alba. 



QuERCUs iMBRiCARiA, Michx. Fl. 2, 197/ Michx. f. Sylv. 1,2?. C5, t. 15 ? Tejon Pass; leaves 

 only. Without the fruit we cannot determine the species with certainty, but the leaves so 

 strongly resemble those of the Laurel-oak, that we would have little doubt as to the identification 

 had the Q. imbricaria ever been found before west ol the Rocky Mountains. The late Captain 

 Gunnison collected it on the headwaters of the Arkansas. 



PopuLUS MOXOLiFERA, Ait. Kciv. cd. 1, ^, p. 406; Michx. f. Sylv. 1, t. 96, Jig. 2. P. Cana- 

 densis, Michx. I. c. t. 95. This is the common cottonwood, .ivhich has a range from the 

 Atlantic to the Great Colorado, and almost as great an extent of latitude. It is abundant in 

 some places near Fort Yuma. 



Salix longifolia, Muhl., var. ? : foliis dense serratis ; fructibus glabris. On the Colorado. 



Ephedra antisiphilitica, Moric. Mountains east of San Diego. 



CtperuS PiiYMATODES, Muhl. Gram. p. 23. Abundant in the immediate valley of the Gila, 

 ten miles fiom Fort Yuma ; November. Near Kern River, Tule ; August. 



CypeRUS Michauxianus, SchuUes ; Torr. Cyp. p. 259. Banks of the Colorado, in moist places ; 

 a dwarf form. 



SciRPUS LACusTRis, i/n/i.; 7arr. Cyp. p. 321. Kern River; August. The specimens are 

 remarkably tall, being more than eight feet high, but the panicle of spikelets is very small. 



ViLFA LTILIS (n. sp.) : glabra culmis prostratis v. assurgentibus ramosissimis tenuibus ; foliis 

 (l"-2") angustis convolutis confertis patulis v. recurvis ; panicula (1") contracta pauciflora ; 

 (spiculis §'" ;) glumis subrequalibus lanceolatis acutis paleas ajquales acutiusculas dimidio bre- 



