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

Geranium robertianum L.
Robert's geranium (herb-Robert; Robert geranium; Robert's geranium)
Geraniaceae (Geranium family)

Introduction to Vascular Plants

© Diane Williamson  Email the photographer   (Photo ID #10522)

E-Flora BC Static Map
Distribution of Geranium robertianum
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Species Information

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General:
Annual herb from a taproot; stems decumbent to ascending, branched, spreading-hairy, 10-60 cm tall.
Leaves:
Basal leaves few, reduced and soon deciduous; stem leaves similar, opposite, more or less triangular in outline, spreading-hairy, 1.5-5 cm long, pinnately divided into 3-5 segments, these cleft or toothed 1/2 their length, terminal leaflet stalked; odoriferous.
Flowers:
Inflorescence of terminal and axillary clusters of 2 short-stalked flowers; petals pink to reddish-purple, soft-hairy at least 1/2 their length from the base, rounded at the tips, 8-13 mm long; sepals 6-9 mm long, bristle-tipped, the tip 1-2 mm long; stamens 10, fertile, not fused.
Fruits:
Carpels, 5-parted, short-hairy at the tips; styles 15-25 mm long, beaks 6-7 mm long; seeds oblong, obscurely pitted.

Source: The Illustrated Flora of British Columbia

Habitat / Range

Mesic, open forests and woodlands in the lowland and montane zones; frequent in SW BC, rare in SC BC northward in the Coast Mountains; introduced from Eurasia.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Geranium robertianum

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) 35 125 445
Slope Gradient (%) 0 9 55
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
45 224 250
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
3 5 7
Modal Nutrient Regime
Class
E
Number of field plots
 species was recorded in:
21
Modal BEC Zone Class
CWH
All BEC Zones (# of stations/zone) species was recorded in: CDF(2), CWH(17)

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.

Taxonomic and Nomenclatural Links

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General References