Rubus ursinusCham. & Schltdl.

trailing blackberry

WFO wfo-0001012593 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Rubus ursinus, photographed by Casey H. Richart
fig. a Casey H. Richart, CC BY 4.0 / 2022-06-12 / obs. 205934885
Rubus ursinus, photographed by Cricket Raspet
fig. b Cricket Raspet, CC BY 4.0 / obs. 203451105
Rubus ursinus, photographed by Dominic Gentilcore
fig. c Dominic Gentilcore, CC BY 4.0 / obs. 204265499
Rubus ursinus, photographed by Jens-Christian Svenning
fig. d Jens-Christian Svenning, CC BY 4.0 / obs. 203969472
Rubus ursinus, photographed by Jens-Christian Svenning
fig. e Jens-Christian Svenning, CC BY 4.0 / obs. 202741296
Rubus ursinus, photographed by Wendy St. John
fig. f Wendy St. John, CC BY-SA 4.0 / obs. 203436849
Rubus ursinus, photographed by Wendy St. John
fig. g Wendy St. John, CC BY-SA 4.0 / obs. 203436931
Rubus ursinus, photographed by Chris Fluit
fig. h Chris Fluit, CC BY 4.0 / obs. 200428793

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Confused withby our own model

These are not lookalikes we guessed at. Each one is a species our identification model genuinely mistook for this plant, and how many times. The error rate is published.

Flowering n = 4,577 observations

Peak flowering in Apr, from 4,577 community-annotated observations worldwide. This is a global aggregate, not a forecast for your garden: the same species flowers on different dates in different hemispheres, and citizen-science records cluster near cities, at weekends, and in spring. Where a species has fewer than 30 annotated records we do not draw this chart at all.

Also published as 18 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Parmena menziesii (Hook.) Greene
  • Rubus eastwoodianus Rydb.
  • Rubus menziesii Hook.
  • Rubus sirbenus L.H.Bailey
  • Rubus spectabilis var. menziesii (Hook.) S.Watson
  • Rubus ursinus subsp. vitifolius (Cham. & Schltdl.) Y.Hesl.-Harr.
  • Rubus ursinus var. eastwoodianus J.T.Howell
  • Rubus ursinus var. glabratus C.Presl
  • Rubus ursinus var. medusae S.W.Br.
  • Rubus ursinus var. menziesii (Hook.) Focke
  • Rubus ursinus var. monophyllus Darrow & Longley
  • Rubus ursinus var. pentaphyllus S.W.Br.
  • Rubus ursinus var. sirbenus (L.H.Bailey) J.T.Howell
  • Rubus ursinus var. typicus S.W.Br.
  • Rubus ursinus var. vitifolius (Cham. & Schltdl.) Focke
  • Rubus vitifolius Cham. & Schltdl.
  • Rubus vitifolius subsp. ursinus (Cham. & Schltdl.) Abrams
  • Rubus vitifolius var. eastwoodianus (Rydb.) Munz

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.

We publish what we can source and we say so when we cannot. This page has no care advice, no toxicity claim and no native range, because we do not yet have those from a source we can cite.