SOUTHERN CALIFORNIA ACADEMY OF SCIENCES. 87 



A New CaliforniaL Rose. 



BY S. B. PARISH. 



V Rosa Mohavensis sp. nov. (R. Califoniica glabrafa. Par- 

 ish, Erythea, C. 88. (1898). 



Stems slender, 5-10 dm. long, destitute of infrastipular 

 spines, but armed with slender scattered prickles, which are 

 straight or nearly so ; glandless and glabrous throughout, except 

 the inner surface of the sepals, which are canescently tomentose ; 

 leaves crowded on short branchlets ; stipules narrow ; leaflets 

 3-5, oval, 5-15 mm. long, mostly obtuse at apex, cuneate or nar- 

 rowed at base, serrate with erect teeth, shortly petiolate ; flowers 

 solitary, or in corymbs 2-3, short pedicellate ; sepals lanceolate- 

 accuminate, the tips enlarged ; petals 4 pink obovate, entire, about 

 15 mm. long; styles distinct; fruit (immature) ovoid-globose, 

 contracted into a short neck. 



Type 2481 ParisJi, June i, 1892, collected by watercourses 

 at Cushenberry Springs, at the desert foot of the San Bernar- 

 dino Mts., alt. about 4000ft. Since received from ^Ir. H. M. 

 Hall, who collected it in 1900 on the desert slope of San Antonio 

 Mt. Also collected long ago at Rock Creek, in the same region, 

 by Dr. Davidson, and probably not uncommon on the borders of 

 the Mohave Desert. 



It is, indeed, the desert analogue of Rosa Califoniica. Ch. 

 & Schl., from which it differs in the smaller size of all its parts, 

 and in the absence of infrastipular spines, or of any glandular or 

 hirsute indument. Even on young and vigorous shoots the leaves, 

 which are then more distant, have leaflets (about 7) not exceed- 

 ing 25 mm. in length.- Early in June of last year I again had an 

 opportunity of observing this rose at the type station, and it ap- 

 peared so distinct that I ventured to propose specific rank for it. 

 In doing so I avail myself of this occasion to change the name 

 formerly given, and which had been used already more than once 

 in the genus. 



The figure is drawn from a specimen collected June 2, 1901, 

 at Cushenberry Springs, by ^Ir. Louis A. Greata and myself. 



San Bernardino. 



Additions to the Flora of Los Angeles County, I. 



By Le Roy Abrams. 

 Pinus Murrayana Balf. Summit of Mt. San Antonio. 

 Sitanion rigidwn J. G. Smith. Summit of Mt. San Antonio. 

 Bromiis carinatus Californiais (Nutt. ) vShear. Fruitland , along 

 irrigating ditches. 



Leptiiriis cylindricus Trin. Mesraer. 



