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

Boykinia occidentalis Torr. & A. Gray
coast boykinia (coastal brookfoam)
Saxifragaceae (Saxifrage family)

Introduction to Vascular Plants

© Jeanne Ross  Email the photographer   (Photo ID #16492)

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Distribution of Boykinia occidentalis
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Species Information

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Perennial herb from rhizomes; stems slender, leafy, 15-60 cm tall, brownish- to reddish-hairy, often glandular-hairy.
Basal and lower stem leaves long-stalked, heart- to kidney-shaped, 2-8 cm wide, 5- to 7-cleft to about 1/2 their length, 2- to 3-times sharply-toothed, the teeth bristle-tipped; upper stem leaves unstalked; stipules slightly winged with several, long brownish bristles.
Inflorescence a terminal, open, compound panicle, the stalks reddish, densely glandular; flowers slightly irregular; petals white, 5-6 mm long, spoon-shaped to oblanceolate, short-clawed, deciduous; calyces 4-5 mm long, top- to urn-shaped, lobed about 1/3 length into narrowly lance-shaped segments, the lobes smooth, the base attached to ovary, glandular; stamens 5, shorter than sepals; pistils solitary, the ovary over 1/2 inferior.
Capsules, beaked; seeds black, minutely spiny.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Moist woodlands, meadows and streambanks in the lowland and montane zones; frequent on Vancouver Island and the adjacent mainland; S to CA.

Source: The Illustrated Flora of British Columbia


Ecological Framework for Boykinia occidentalis

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




Elevation (metres) 1 190 1620
Slope Gradient (%) 0 13 100
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
8 51 360
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
0 5 8
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: CWH(108), MH(1)


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 cool mesothermal.

Synonyms and Alternate Names

Boykinia elata (Nutt.) Greene
Boykinia vancouverensis (Rydb.) Fedde

Taxonomic and Nomenclatural Links

Additional Photo Sources

General References