Rubus idaeus L. var. viburnifolius (Greene) Greene ex A. Berger, New York Agric. Exp. Sta. Bull. 2: 51. 1925.

Huang, Tiran, Yu, Liping, Li, Juntao, Wang, Wenhe, Yang, Aizhen, Wang, Wenping, Wang, Cong, Yang, Mingfeng, Wang, Hong & Ma, Lanqing, 2022, Nomenclatural and taxonomic notes on Rubus davidianus Kuntze and R. viburnifolius Franch, PhytoKeys 211, pp. 13-32 : 13

5. Rubus idaeus L. var. viburnifolius (Greene) Greene ex A. Berger, New York Agric. Exp. Sta. Bull. 2: 51. 1925.

R. viburnifolius (Greene) Rydb. (1913: 446) ≡ Batidea viburnifolia Greene (1906: 242) Type: US, Selkirk Mountains, C.H. Shaw, Aug 1904, no. 472 (holotype: US [US01106201]!; isotypes: MIN [MIN1002232]!, NY [NY00418578]!, S [S-G-8589]! (with image of NY00418578).

Distribution and habitat.

Rubus ideaus var. viburnifolius (Greene) Greene ex A.Berger grows in woods. It is distributed in western North America, Alaska to Mackenzie, Montana and south to British Columbia and perhaps to Wyoming and Utah.

Phenology.

Unknown.

Taxonomic notes.

Rubus ideaus var. viburnifolius (Greene) Greene ex A.Berger is treated as a variety of R. ideaus and is similar to R. ideaus var. peramoenus (Greene ex Fedde) Fernald. The differences are: canes glabrous or puberulent and more or less densely bristly; leaflets also green on both sides or somewhat tomentose underneath when young, but strongly veined beneath and more or less plicate; the former has inflorescence rachis and pedicels with glandular hairs; abaxial surface of calyx without glandular hairs; branchlets, petioles and pedicel with sparse prickles or nearly unarmed.