Oxalis oregana Nutt.
redwood sorrel (redwood-sorrel)
Oxalidaceae (Wood-Sorrel family)
Introduction to Vascular Plants
redwood sorrel (redwood-sorrel)
Oxalidaceae (Wood-Sorrel family)
Introduction to Vascular Plants
Introduction
Redwood sorrel is a herbaceous perennial species that is found in North America from British Columbia south to California. In British Columbia it is rarely found on the Queen Charlotte Islands (Haida Gwaii) and the west coast of Vancouver Island, in the Coastal Western Hemlock BEC zone (Douglas et al. 1999). The leaves are light-responsive, opening in direct sun and closing when shaded (Wikipedia 2012). The ecological framework information for this species on E-Flora BC shows that it is generally found at an elevation of 25 m, but may be found up to an elevation of 80 m.
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Species Information
General:
Perennial herb from a scaly rhizome, 5-20 cm tall; stems ascending to erect, several, simple, brown-hairy, 5-15 cm long.
Leaves:
All basal, numerous, clover-like, the blades 1-4.5 cm long, stalks brownish-hairy, 3-20 cm long, leaflets broadly heart-shaped, folded towards each other.
Flowers:
Inflorescence of single terminal flowers; petals white to pinkish, 13-20 mm long, entire; sepals 5-10 mm long.
Fruits:
Capsules, egg-shaped, 7-9 mm long, hairy; seeds almond-shaped, 3.5-4 mm long, longitudinally marked.
Illustration
If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.
Illustration Source: The Illustrated Flora of British Columbia
Ecology
Ecological Framework for Oxalis oregana
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)
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 |
||
|
Avg |
Min |
Max |
|
| Elevation
(metres) |
20 | 0 | 80 |
| Slope
Gradient (%) |
0 | 0 | 1 |
|
Aspect (degrees) |
0 | ||
| Soil
Moisture Regime (SMR) [0 - very xeric; 4 - mesic; 8 - hydric] |
5 | 5 | 7 |
| Modal
Nutrient Regime
Class |
D | ||
| #
of field plots species was recorded in: |
5 | ||
| Modal
BEC Zone Class |
CWH | ||
|
All BEC Zones (# of stations/zone) species was recorded in |
CWH(5) | ||
|
Source:
Klinkenberg 2013
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Habitat and Range
Moist forests in the lowland zone; rare on the Queen Charlotte Islands and W coast of Vancouver Island; S to CA.Status Information
Synonyms
Synonyms and Alternate Names:
Oxalis acetosella subsp. oregana (Nutt.) D. Löve
Oxalis oregana var. smallii (R. Knuth) M. Peck