Rubus arcticus subsp. acaulis

(Michaux) Focke

Biblioth. Bot. 17(Heft 72): 24. 1910.

Common names: Dwarf raspberry ronce acaule
Endemic
Basionym: Rubus acaulis Michaux Fl. Bor.-Amer. 1: 298. 1803
Synonyms: R. arcticus var. acaulis (Michaux) B. Boivin R. arcticus var. grandiflorus Ledebour
Treatment appears in FNA Volume 9. Treatment on page 35. Mentioned on page 36, 51.

Plants 0.5–2 dm. Stems glabrous or hairy. Leaves usually ternate; petiole glabrous or hairy; central leaflets ovate to obovate, to 6 cm (lateral leaflets shorter), base cuneate, margins dentate to serrate (often doubly), apex usually rounded. Inflorescences: flowers solitary. Pedicels stipitate-glandular. Flowers: sepals caudate, glabrous or hairy, eglandular or glandular; petals pink to rose, oblanceolate to obovate, 15–25 mm, apex slightly to strongly emarginate. 2n = 14, 21.


Phenology: Flowering May–Aug.
Habitat: Muskegs, boggy woods, fens, bogs, swamps, thickets, moist tundra
Elevation: 0–3000 m

Distribution

V9 39-distribution-map.jpg

St. Pierre and Miquelon, Alta., B.C., Man., Nfld. and Labr., N.W.T., Nunavut, Ont., Que., Sask., Yukon, Alaska, Colo., Maine, Mich., Minn., Mont., Oreg., Wash., Wyo.

Discussion

Subspecies acaulis hybridizes with Rubus pubescens (R. ×paracaulis L. H. Bailey [= R. pubescens var. paracaulis (L. H. Bailey) B. Boivin]) in areas of sympatry.

Selected References

None.

Lower Taxa

None.
Lawrence A. Alice +, Douglas H. Goldman +, James A. Macklin +  and Gerry Moore +
(Michaux) Focke +
Rubus acaulis +
Dwarf raspberry +  and ronce acaule +
St. Pierre and Miquelon +, Alta. +, B.C. +, Man. +, Nfld. and Labr. +, N.W.T. +, Nunavut +, Ont. +, Que. +, Sask. +, Yukon +, Alaska +, Colo. +, Maine +, Mich. +, Minn. +, Mont. +, Oreg. +, Wash. +  and Wyo. +
0–3000 m +
Muskegs, boggy woods, fens, bogs, swamps, thickets, moist tundra +
Flowering May–Aug. +
Biblioth. Bot. +
R. arcticus var. acaulis +  and R. arcticus var. grandiflorus +
Rubus arcticus subsp. acaulis +
Rubus arcticus +
subspecies +