396 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



3. Rubus oligospermus Thornber ex Rydb., North Amer. Fl. 22: 470. 



1913. 



Graham, Gila, Pinal, and Pima Counties, 3,500 to 5,000 feet, often 

 along streams in partial shade, March to May, type from the Santa 

 Rita Mountains, Pima County {Pringle in 1881). Arizona and 

 northern Mexico. 



Closely related to R. trivialis Michx., the southern dewberry of the 

 eastern United States, but lacks bristles on the stems and has more 

 finely serrate leaf blades. The trailing habit of the plant makes it a 

 good ground cover, protecting the soil against erosion. 



4. Rubus procerus Muell., Soc. Acad. Maine et Loire Mem. 24: 209. 



1868. 



? Rubus thyrsanthus of authors. Not of Focke? 



Oak Creek Canyon, Coconino County (Fulton 9695), Sierra Ancha, 

 Gila County (Kearney and Harrison 5950), about 6,000 feet. 



This is an introduced species, probably the one cultivated under the 

 name Himalaya -berry and, although growing semiwild at the sta- 

 tions mentioned, it can scarcely be regarded as established in the 

 Arizona flora. The identity of the species is uncertain. 



5. Rubus strigosus Michx., Fl. Bor. Amer. 1: 297. 1803. 



Apache County to Mohave County, south to Cochise and Pima 

 Counties, 8,500 to 11,500 feet, rich soil of pine and spruce forests, 

 June and July. Widely distributed in the cooler parts of North 

 America. 



This species is the progenitor of some of the cultivated raspberries. 

 It is represented in Arizona by var. arizonicus (Greene) Kearney and 

 Peebles (Batidaea arizonica Greene, Rubus arizonicus Rydb.), which 

 seems to differ from typical R. strigosus only in having usually more 

 numerous leaflets, up to 9 on the shoots, mostly 5 on the flowering 

 branches. 



6. Rubus leucodermis Dougl. ex. Torr. and Gray, Fl. North Amer. 



1: 454. 1840. 



Melanobatus bernardinus Greene, Leaflets 1: 244. 1906. 

 Rubus bernardinus Rydb., North Amer. Fl. 22: 444. 1913. 



Along Oak Creek, Coconino County, about 5,500 feet (Goldman 

 2171, Fulton 4356). Montana to British Columbia, south to New 

 Mexico, central Arizona, and California. 



10. FRAGARIA. Strawberry 



Plants herbaceous, acaulescent; scapes from short rootstocks, these 

 emitting long runners; leaves long-petioled, digitately trifoliolate, the 

 leaflets obovate or wedge-shaped, coarsely toothed; flowers rather 

 large, the petals broad and rounded, white; stamens many; pistils 

 numerous, becoming achenes embedded in pits on the surface of the 

 enlarged fleshy receptacle. 



The fruits of the wild strawberries, although edible, are too small 

 to be of much use to man, although doubtless they are relished by 

 birds and other animals. 



