

90 BOTANY OF THE DEATH VALLEY EXPEDITION. 



This tree, the screw bean, has practically the same range as P. juliflora, and while 

 less abundant than that species, is almost invariably accompanied by it. It occurred 

 at the old Eagle Borax Works, in Death Valley; in Furnace Creek Canon; along the 

 Amargosa, near Saratoga Springs, on the authority of Mr. Nelson; at several points 

 in Resting Springs Valley ; at Ash Meadows; near Cottonwood Springs, Vegas Valley; 

 in the Vegas Wash; at Corn Creek, Vegas Valley; in Surprise Canon, Panamint 

 Mountains ; and at Hot Springs, Panamint Valley. The largest specimen observed was 

 near the south end of Resting Springs Valley. At about a meter from the ground 

 its trunk measured 1.64 meters in circumference, while at the base it had several 

 branches and was much larger. The tree is a beautiful one, its narrow outline and 

 ascendant branches giving it a strikingly different appearance and much more grace- 

 ful figure than P. juliflora, with its rounded or depressed form and divergent crooked 

 branches. 



Acacia greggii Gray, PI. Wright, i. 65 (1852). Type localities, " Western Texas," 

 and "dry valley west of Patos, Northern Mexico." 



This shrub or small tree, the cats claw, was seen at Cottonwood Springs, Lincoln 

 County, Nevada, and near the mouth of the Vegas Wash. It appears to have extended 

 northward through the valley of the Colorado River, but not to have spread very far 

 away from it. In the region traversed by the expedition it did not occur west of the 

 Charleston Mountains. Dr. Merriam reported it farther east, at Bitter Springs in 

 the Muddy Mountains, and in the valleys of the Virgin and Muddy to the junction of 

 the former with Beaverdam Creek, in extreme northwestern Arizona. 



ROSACEA. 



Frunna andersonil dray, Proc. Amer. Acad. vii. 337(1868). Type locality, "foot- 

 hills of the eastern side of the Sierra Nevada, near Carson." 



Observed only in Willow Creek Canon, Panamint Mountains (No. 840); in the 

 Coso Mountains (No. 883) ; and on the slopes of Walker Bass. A specimen of I'tinui* 

 that was seen in winter near the head of Johnson Canon, in the Panamint Mountains, 

 and which was not P. fascicuhtta, probably belongs also to this species. The few 

 specimens of P. andersonil that were found grew near the line between the Upper 

 and Lower Sonoran /ones. 



Pruiius demissa (Nutt.) in Torr. &. Gr. PI. i. 411 (1840), under Cerasus; Walp. Rcpt. 

 ii. 10 (1843). Type locality, "plains of the Oregon towards the sea, and at the mouth 

 of the Wahlamet." 



Near Havilah, Kern County, California (No. 1079). "Dr. Merriam found a choke- 

 cherry at Sheep Spring, in the Juniper Mountains, Nevada, but collected no speci- 

 mens of it. 



Prunus emarginata (Dougl.) in Hook. Fl. Bor. Amer. i. 169 (1834), under Ceraxtis; 

 Walp. Rept. ii. 9 (1843). Type locality, "on the upper part of the Columbia River, 

 especially about the Kettle Falls." 



The plant here designated is a shrub 1.5 to 2.5 motors high, with bright red as- 

 tringent and bitter fruit. It was seen along the Kawcah River road, a few kilo- 

 meters below Mineral King, and again in the Sierra Nevada between Trout Meadows 

 and the Kern River Lakes, in both places growing among the black pines. 



Prunus fasciculata (Torr.) PI. From. 10 (1853), under Emplectocladus; Gray, Proc. 

 Amer. Acad. x. 70(1874). Type locality, "Sierra Nevada of California; probably 

 in the southern part of the range." 



The leaves of this plant have always been described as entire, but some of our 

 specimens, and others collected by Palmer in southern Utah, have often 1 or 2 teeth 

 on either side. The leaves are also puberulent, at least when young, thus distin- 

 guishable from those of P. andcrsonii, and they sometimes attain a length of 2 cm. 



