Frangula purshiana (Cascara)

Plate 1 figs. a–h

Frangula purshiana, photographed by Casey H. Richart — fig. a Casey H. Richart, CC BY 4.0 / 2022-06-04 / obs. 203746835

Frangula purshiana, photographed by Randal — fig. b Randal, CC0 1.0 / obs. 203967111

Frangula purshiana, photographed by Ken-ichi Ueda — fig. c Ken-ichi Ueda, CC BY 4.0 / obs. 202110624

Frangula purshiana, photographed by Shane Johnson — fig. d Shane Johnson, CC0 1.0 / obs. 190233697

Frangula purshiana, photographed by Sean Haight — fig. e Sean Haight, CC0 1.0 / obs. 185451076

Frangula purshiana, photographed by Don Loarie — fig. g Don Loarie, CC BY 4.0 / obs. 194402410

Frangula purshiana, photographed by Braden J. Judson — fig. h Braden J. Judson, CC0 1.0 / obs. 190911671

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.

Flowering n = 136 observations

Flowering observations of Frangula purshiana by month
Month	Observations
Jan	0
Feb	0
Mar	0
Apr	10
May	96
Jun	25
Jul	5
Aug	0
Sep	0
Oct	0
Nov	0
Dec	0

Peak flowering in May, from 136 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 6 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.

Cardiolepis obtusa Raf.
Frangula anonifolia (Greene) Grubov
Rhamnus annonifolia Greene
Rhamnus purshiana DC.
Rhamnus purshiana var. annonifolia (Greene) Jeps.
Rhamnus purshiana var. hirtella Schelle

Sourcesevery claim on this page

World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
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.