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

Geum rivale L.
water avens (purple avens)
Rosaceae (Rose family)

Introduction to Vascular Plants

© Curtis Bjork  Email the photographer   (Photo ID #16597)

E-Flora BC Static Map
Distribution of Geum rivale
Click here to view the full interactive map and legend
Details about map content are available here
Click on the map dots to view record details.

Species Information

Click on the image below to view an expanded illustration for this species.



General:
Perennial herb from short rhizome and stout stem-base; stems erect, 30-80 cm tall, simple or few-branched, coarse-hairy becoming fine-hairy above.
Leaves:
Basal leaves several, long-stalked, interruptedly pinnately cleft, 10-30 cm long, hairy at least beneath, with 7 to 15 cleft and toothed segments, 1 to 3 of them much larger than the others, the terminal segment the largest, to 10 cm long, broadly egg-shaped and 3-lobed; additional much smaller segments remote and variable in shape; stem leaves alternate, 2 to 5, much smaller, variously toothed to 3-lobed.
Flowers:
Inflorescence an open, bracted, terminal cluster of 1 to 9 stalked flowers, the flowers nodding at first, later erect; corollas orange-pink to yellow and purple-veined, bell-shaped, the petals 5, erect, spoon-shaped, shallowly notched, 7-9 mm long; calyces reddish-purple, 5-lobed, the lobes erect, lanceolate, about 10 mm long, alternating with linear bractlets about 1/3 the length of the calyx lobes; ovaries superior; stamens very numerous, 100 or more.
Fruits:
Achenes, numerous, spreading, in hemispheric heads; achenes ellipsoid, flattened, 3-4 mm long, stiff-hairy, beaked with the 9- to 12-mm long style, which has an S-shaped kink a little above the middle, the lower persistent joint hairy below and smooth above, the upper (above the kink) ultimately deciduous joint long-hairy.

Source: The Illustrated Flora of British Columbia

USDA Species Characteristics

Flower Colour:
Purple
Blooming Period:
Mid Spring
Fruit/Seed characteristics:
Colour: Brown
Present from Spring to Summer
Source:  The USDA

Habitat / Range

Marshes, streambanks, swamps, and moist to wet meadows and open forests in the lowland and montane zones; infrequent in BC east of the Coast-Cascade Mountains, S of 57degreeN; circumboreal, E to NF and S to CA, NM, MO and PA; Eurasia.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Geum rivale

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) 8 1007 1943
Slope Gradient (%) 0 2 30
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
0 109 355
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
1 6 8
Modal Nutrient Regime
Class
D
Number of field plots
 species was recorded in:
122
Modal BEC Zone Class
SBS
All BEC Zones (# of stations/zone) species was recorded in: BWBS(6), ESSF(21), ICH(18), IDF(10), MS(7), PP(2), SBPS(5), SBS(45)

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

Additional Photo Sources

General References