Stem rather tall, slender, loosely branched, armed with straight, slender, infrastipular prickles 3-8 mm. long, terete or slightly flattened below; branches purple, with a bloom; leaves usually 7-foliolate; stipules small and narrow, about 1 cm. long, densely glandular, free lobes lanceolate, or subulate, more or less spreading, entire ; petioles and rachis glandular- puberulent and with a few week prickles; leaflets broadly rounded-obovate or suborbicular; double-toothed, with gland-tipped teeth, 1-2.5 cm. long, minutely soft-puberulent and conspicuously glandular-puberulent on both sides, paler beneath; flowers corymbose; hypanthium glabrous, globose; sepals linear-lanceolate, caudate-attenuate, about 15 mm. long, glandular- puberulent without, tomentose within; petals obovate, about 1 cm. long.
Type locality: Calaveras Big Tree Grove, California.
Distribution: Southern Sierra Nevada, California.
- North American flora. Rocaceae. v. 22 pt. 6 (1918). New York Botanical Garden. p. 518.
Names and Taxonomy
According to The Plant List, this name is unresolved. Though it appears in other databases, little information is available. A specimen identified as Rosa calvaria also was identified as Rosa bridgesii and Rosa californica, so perhaps it is synonymized with one of those.