San Diego raspberry

Rubus ganderi L. H. Bailey; R. glaucifolius subsp. ganderi (L. H. Bailey) R. M. Beauchamp; R. glaucifolius var. ganderi (L. H. Bailey) Munz; R. leucodermis Douglas ex Torrey & A. Gray var. glaucifolius (Kellogg) Jepson

Shrubs, to 3 dm, weakly armed. Stems ˂biennial˃, creeping, glabrous, eglandular, strongly pruinose; prickles sparse, erect or slightly curved, weak, slender, 2–3 mm, narrow-based. Leaves deciduous, ternate; stipules filiform to linear, 3–10 mm; terminal leaflets ovate to elliptic, 4–8 × 3–7 cm, base tapered or subcordate, often 2-lobed, margins coarsely dentate, apex acute to rounded, abaxial surfaces unarmed, densely white-tomentose, eglandular. Inflorescences terminal and axillary, (1–)2–4(–10)-flowered, cymiform. Pedicels unarmed, finely hairy, stipitate-glandular. Flowers bisexual; petals white, oblong to oblanceolate, 4–8 mm; filaments laminar; ovaries white-tomentose. Fruits reddish purple, hemispheric to conic, 0.4–1 cm diam.; drupelets 10–40, coherent, separating from torus.

Flowering Apr–Jul. Semiopen montane forests; 800–2100 m; Calif., Oreg.

Rubus glaucifolius is found in the Sierra Nevada and Klamath mountains as well as the Peninsular and northern Coastal ranges in California, and in adjacent Oregon only in Jackson County.