Rubus arizonensis Focke

Rubus oligospermus Thornber, sp. nov
Rubus trivialis (A. Gray, Mem. Am. Acad. 5: 301; hypnonym. 1854) S. Wats. Proc. Am. Acad.
17: 353. 1882. Not R. trivialis Michx. 1803. Rubus humifusus Hemsl. Biol. Centr. Am. Bot. 1: 371, in part. 1880.
Stem biennial, trailing, terete, glabrous, 1-6 m. long, armed with short, recurved, flattened prickles, yellowish-green; leaves of the turions 5-foliolate; stipules subulate, adnate at the base, about 5 mm. long; petioles, petiolules, and midveins sparingly pubescent, armed with strongly flattened recurved short prickles; terminal leaflet ovate, irregularly dentate-serrate, acute at the apex, rounded at the base, 4-5 cm. long, thin, sparingly pilose above, more or less softly pubescent beneath, its petiolule about 2 cm. long; lateral leaflets ovate, short-petioluled, the outermost lanceolate or oblanceolate, sessile, 2-3 cm. long; floral branches 5-10 cm. long; leaves 1 -5-foliolate, 1-4 cm. long, more pubescent and more sharply serrate than those of the turions; inflorescence 1-5-flowered, corymbiform, leafy-bracted, villous and armed with recurved prickles; sepals ovate, mucronate, 5-6 mm. long, villous-tomentose on both sides; petals white, broadly obovate or oval, 8-9 mm. long; fruit globose, 10-12 mm. broad; drupelets 12-25, large and juicy; putamen strongly reticulate, 3 mm. long.
Type collected near streams of the Santa Catalina Mountains, Arizona, in 1881, C. G. Pringle (U. S. Nat. Herb.).
Distribution: Arizona, Sonora, San Luis Potosi, Jalisco, and Durango.

Rubus arizonensis, called Arizona dewberry, is a North American species of dewberry in section Procumbentes of the genus Rubus, a member of the rose family. It is endemic to Arizona and Sonora, Mexico.

Rubus arizonensis là loài thực vật có hoa trong họ Hoa hồng. Loài này được Focke miêu tả khoa học đầu tiên năm 1914.