



CATALOGUE OF SPECIES. 77 



Lone Willow Spring; on Browns Peak; on the mountain slope west of Lone Willow 

 Spring; in the mountains east of Resting Springs; in the southern part of the Fu- 

 neral Mountains, west of Amargosa; between Furnace Creek and Ash Meadows; 

 between the latter point and Pahrump Valley ; on the west slopeof Mountain Spring 

 Pass, Charleston Mountains; between Cottonwood Spring and Vegas Ranch (No. 396); 

 in the northern part of Vegas Valley ; on the slopes of the divide northwest of To w it- 

 ers; in the valley of the Virgin (No. 1931); and in Surprise (No. 653), Mill Creek, 

 and Willow Creek canons, Panamint Mountains. The plant is characteristic of the 

 upper part of the Lower Sonoran zone, extending from the upper limit of Larrea 

 down to about 1,000 meters. Dr. Merriam reported it also from Indian Spring Val- 

 loy, California, and from the Virgin and Santa Clara valleys, Utah. 



CELASTRACE-ffi. 



Mortonia scabrella Cray, PL Wright, ii. 28 (1853). Type localities, "mountain- 

 sides, near the San Pedro, Sonora," and " mountains near El Paso." 



Specimens were collected by Mr. Bailey at Overton, Nevada (No. 1933). Like others 

 collected in southern Utah by Palmer iu 1877, they differ conspicuouly from typical 

 M. scabrella in the size of their leaves and flowers. Their leaves are 8 to 14 mm. and 

 their calicos 5 to 6 mm. in length, while in the typical plant the same organs are 

 only 4 to 7 mm. and 2 to 3 mm. long, respectively. The species is known in the 

 Mexican states of Sonora and Chihuahua, in western Texas, anil southern New 

 Mexico. The localities in Utah and Nevada are about 800 kilometers northwest of 

 any other known station. 



Forsellesia nevadensis (Cray) Proc. Amer. Acad. xi. 73 (1876), under Glossnpe- 

 talon; Greene, Erythea, i. 206 (1893). Type locality, "northern part of Washoe 

 County, Nevada." 



Crucial characters for distinguishing this plant from G. spinescens have not yet 

 been found. The general characters upon which it has been separated are the larger 

 leaves and larger, more persistent stipules. 



According to specimens in the National and Gray herbaria G. nevadense has been 

 collected in the original locality'"; on the west side of Pyramid Lake, Nevada; on 

 hillsides near Laughton's Springs, between Reno and Verdi, Washoe County, Nevada ; 

 near Virginia City, Nevada; and at Pahroc Spring, Nevada (No. 1986 of the present 

 collection) : while G. spinescens has been collected from the Staked Plains of Texas 

 to El Paso; at several points in New Mexico, Arizona, southern Utah, and southern 

 Nevada; on the Snake River, Oregon; on the north slope of the San Bernardino 

 Mountains; and now in the Panamint Mountains of California. 



ForselleBia spinescens (Gray) PL Wright, ii. 29 (1853), nnder Glossopeialon; 

 Greefte, Erythea, i. 206 (1893). Type locality, " in a mountain ravine near Frontera, 

 New Mexico." 



The shrub was very scarce, being seen only in Mountain Spring Pass, Charleston 

 Mountains (Nos. 388, 1880) ; in the Panamint Mountains, about the head of Johnson 

 Canon and in Surprise Cation (No. 644). Only a few plants occurred at each place. 

 All the localities were in the lower part of the Upper Sonoran zone. 



RHAMNACEiE. 



Rhamnus californica Esch. Mem. Acad. St. Pet. x. 285 (1826). Type locality, 

 "in Novae Californiae frnticetis." 



South Slope of the San Bernardino Mountains (No. 126). 



Since the original description of Rhamnus californica may be accessible to but few 

 American botanists a literatim copy of it is given here: 

 8. RHAMNUS CALIFORNICA. 



R. inermis, floribua hermapliroditis monngynia faaciculato umbellatis, bacca disperma, foliia ovali- 

 tms serrulatia. Tii Novae Californiae t'ruticctis. 



FruUx bioryyalia. Caulia teres fuaous, i'ero glaber ; rainis angulatia, ciiiereo tomeiitosia. [p. 28G.] 



