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

Rubus arcticus subsp. acaulis L. (Michx.) Focke
nagoonberry (dwarf raspberry)
Rosaceae (Rose family)

Introduction to Vascular Plants

© Val George  Email the photographer   (Photo ID #43762)

E-Flora BC Static Map
Distribution of Rubus arcticus subsp. acaulis
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Species Information

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General:
Perennial herb (rarely somewhat woody at the base) from a slender rhizome; annual flowering shoots erect, 5-15 cm tall, several, tufted, leafy, unarmed, finely soft-hairy.
Leaves:
Alternate, deciduous, 2 to 5 per flowering shoot, long-stalked, palmately compound or shallowly lobed, the stalks more or less hairy; leaflets or lobes 3, the leaflets, if present, wedge-egg-shaped, 1-5 cm long, the leaflets or lobes usually rounded at the summit, coarsely single- or double-toothed except near the base, greenish on both surfaces, smooth to hairy above, paler and usually hairy especially on the veins beneath; stipules lanceolate to egg-shaped.
Flowers:
Inflorescence of 1 to 3 stalked flowers atop erect leafy shoots; corollas pink to rose, the petals 5, lance-egg-shaped to spoon-shaped, 8-18 mm long, erect; calyces fine-hairy and sometimes glandular, 5-lobed, the lobes narrowly lanceolate, 5-13 mm long, bent back; ovaries superior; stamens 30 to 40, the filaments flattened.
Fruits:
Drupelets, 20 to 30, smooth, coherent in a red to purplish, globe-shaped cluster, about 1 cm wide, that separates from the dry receptacle (raspberry-like).
Notes:
Two subspecies occur in BC:

1. Leaves compound; calyces lacking glands; frequent throughout BC............... ssp. acaulis (Michx.) Focke

1. Leaves 3-lobed or nearly entire; calyces with yellow glands; rare in NW BC................. ssp. stellatus (Sm.) Boivin

Source: The Illustrated Flora of British Columbia

Habitat / Range

Bogs, fens, swamps, wet to moist meadows, thickets and open forests in the montane to alpine zones; frequent throughout BC, mostly in and east of the Coast-Cascade Mountains; circumpolar, N to AK, E to NF and S to MT, CO and MN; Eurasia.

Source: The Illustrated Flora of British Columbia

Ecology

Ecological Framework for Rubus arcticus ssp. acaulis

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) 558 1108 1960
Slope Gradient (%) 0 4 48
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
40 84 340
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
3 6 8
Modal Nutrient Regime
Class
E
Number of field plots
 species was recorded in:
52
Modal BEC Zone Class
SBPS
All BEC Zones (# of stations/zone) species was recorded in: BWBS(6), ESSF(14), ICH(10), MS(3), SBPS(16), SBS(1), SWB(2)

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

Cylactis arctica subsp. acaulis (Michx.) W.A. Weber
Rubus acaulis Michx.
Rubus arcticus var. acaulis (Michx.) Boivin

Taxonomic and Nomenclatural Links

Additional Photo Sources

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General References