E-Flora BC: Electronic Atlas of the Flora of British Columbia

Opuntia fragilis (Nutt.) Haw.
brittle prickly-pear cactus (brittle pricklypear)
Cactaceae (Cactus family)

Introduction to Vascular Plants

© Ted Edwards  Email the photographer   (Photo ID #6824)

E-Flora BC Static Map
Distribution of Opuntia fragilis
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Introduction

Previously, two species of Opuntia were recognized as present in British Columbia: O. fragilis and O. polyacantha. However, the BC Conservation Data Centre, and E-Flora BC, follow Flora North America, and no longer recognize O. polyacantha as present in the province.

Identification of cacti in the province is not completely clear, however, and different 'forms' of Opuntia have been observed here. Read more about Opuntia in BC and Washington.

Species Information

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General:
Perennial herb from a fibrous root; mat-forming; stems prostrate, succulent, subglobose to rounded, fleshy, 5-20 cm tall; stem segments not much flattened, readily detaching from the plant, round to egg-shaped, 2-5 cm long; areoles coarsely white-woolly with a few yellowish, spiny bristles and 2-7 straight, yellowish to brownish, 1-3 cm long spines.
Leaves:
Reduced to 2-7, large yellowish to brownish spines 1-3 cm long, strongly barbed.
Flowers:
Inflorescence of single flowers with paper-thin petals, borne on previous year's pits, yellow, 3-5 cm across, stamens numerous with reddish stalks.
Fruits:
Dry, spiny berry, 1.5-2 cm long, pear-shaped.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Dry grassy, sandy or gravelly slopes in the lowland, steppe and montane zones; common in S BC east of the Coast-Cascade Mountains, less frequent on SE Vancouver Island and the Gulf Islands, rare along the Peace River in NE BC; E to ON and S to KS, IL, TX and N CA.

Source: The Illustrated Flora of British Columbia

Additional Notes

Fragile prickly pear is a native BC cactus with small pads that can be cylindrical (usually in the interior of the province) or larger and somewhat flattened (coastal forms). The pads can be upright or prostrate. In summer they produce bright yellow cactus flowers. Plant in full sun in sharply draining soil.

Note Author: Gary Lewis, Phoenix Perennials

Ecology

Ecological Framework for Opuntia fragilis

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class

Minimum

Average

Maximum

Elevation (metres) 225 586 1115
Slope Gradient (%) 0 21 90
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
5 187 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 2 7
Modal Nutrient Regime
Class
C
Number of field plots
 species was recorded in:
529
Modal BEC Zone Class
BG
All BEC Zones (# of stations/zone) species was recorded in: BG(402), BWBS(1), IDF(43), PP(64)

Climate

The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Synonyms and Alternate Names

Cactus fragilis Nutt.
Opuntia brachyarthra Engelm. & Bigelow
Opuntia fragilis subsp. brachyarthra (Engelm. & Bigelow) W.A. Weber
Opuntia fragilis var. brachyarthra (Engelm. & Bigelow) Coult.
Opuntia fragilis var. denudata Wieg. & Backeberg
Opuntia fragilis var. fragilis (Nutt.) Haw. [superfluous autonym]

Taxonomic and Nomenclatural Links

Additional Photo Sources

Related Databases

General References