Rubus pubescens

Rafinesque

Med. Repos., hexade 3, 2: 333. 1811.

Common names: Dwarf red blackberry or raspberry or red raspberry ronce pubescente
EndemicIllustrated
Basionym: Rubus saxatilis var. canadensis Michaux Fl. Bor.-Amer. 1: 298. 1803
Synonyms: R. pubescens var. pilosifolius A. F. Hill
Treatment appears in FNA Volume 9. Treatment on page 51. Mentioned on page 32, 36.

Herbs, to 0.4 dm, unarmed. Stems creeping, flowering branches erect, glabrous or sparsely to moderately hairy, eglandular, not pruinose. Leaves deciduous, usually ternate, sometimes pedately 5-foliate; stipules lanceovate to oblanceolate, (5–) 8–12 (–20) mm; leaflets 3 (–5), petiolule of terminal leaflet 2–7 mm, terminal rhombic to obovate, (2–) 4–8 (–10) × 2–4 (–6) cm, base cuneate, unlobed or 2-lobed, margins deeply serrate to doubly serrate, apex acute or acuminate, abaxial surfaces glabrous or sparsely hairy, eglandular. Inflorescences 1–3-flowered, sometimes umbelliform. Pedicels moderately to densely long-hairy, eglandular to densely stipitate-glandular. Flowers bisexual; petals white to pink, oblanceolate to obovate, (4–) 6–8 (–10) mm; filaments laminar; ovaries glabrous, styles glabrous. Fruits red, globose to conical, 0.5–1.4 cm diam., drupelets (5–) 10–25, loosely coherent, falling separately or as a unit with torus attached. 2n = 14.


Phenology: Flowering May–Jul.
Habitat: Swamps, bogs, fens, stream banks, moist woods, bluffs, gravel sites, sandy soil
Elevation: 0–2200 m

Distribution

V9 71-distribution-map.jpg

St. Pierre and Miquelon, Alta., B.C., Man., N.B., Nfld. and Labr., N.W.T., N.S., Ont., P.E.I., Que., Sask., Yukon, Alaska, Colo., Conn., Idaho, Ill., Ind., Iowa, Maine, Mass., Mich., Minn., Mont., Nebr., N.H., N.J., N.Y., N.Dak., Ohio, Pa., R.I., S.Dak., Vt., Wash., W.Va., Wis., Wyo.

Discussion

Rubus pubescens is recognized by its creeping, unarmed stems, oblanceolate to lance-ovate stipules, relatively small flowers, and white to pink petals. It hybridizes with R. arcticus subsp. acaulis in areas of sympatry, and the hybrids are referable to R. ×paracaulis L. H. Bailey [= R. pubescens var. paracaulis (L. H. Bailey) B. Boivin]. The hybrids are similar to R. arcticus subsp. acaulis in having more obovate, rounded leaflets, and larger, pink to magenta petals; they are larger, creeping, and have hairy and stipitate-glandular pedicels and sepals like R. pubescens.

Selected References

None.

Lower Taxa

None.
... more about "Rubus pubescens"
hairy +  and glabrous +
Lawrence A. Alice +, Douglas H. Goldman +, James A. Macklin +  and Gerry Moore +
Rafinesque +
compound +  and simple +
opposite +  and alternate +
2-lobed +, unlobed +  and cuneate +
Rubus saxatilis var. canadensis +
reniform +  and orbiculate +
2 cm20 mm <br />0.02 m <br /> (30 cm300 mm <br />0.3 m <br />) +
? (?) +  and ? (?) +
not pruinose +
glabrous or +  and sparsely moderately hairy +
not pruinose +
stipitate-glandular +, hairy +  and glabrous +
sparse to dense +
free +  and distinct +
hairy +  and glabrous +
Dwarf red blackberry or raspberry or red raspberry +  and ronce pubescente +
St. Pierre and Miquelon +, Alta. +, B.C. +, Man. +, N.B. +, Nfld. and Labr. +, N.W.T. +, N.S. +, Ont. +, P.E.I. +, Que. +, Sask. +, Yukon +, Alaska +, Colo. +, Conn. +, Idaho +, Ill. +, Ind. +, Iowa +, Maine +, Mass. +, Mich. +, Minn. +, Mont. +, Nebr. +, N.H. +, N.J. +, N.Y. +, N.Dak. +, Ohio +, Pa. +, R.I. +, S.Dak. +, Vt. +, Wash. +, W.Va. +, Wis. +  and Wyo. +
not +  and aggregated +
as a unit +  and falling +
0–2200 m +
0.5 cm5 mm <br />0.005 m <br /> (8 cm80 mm <br />0.08 m <br />) +
not +  and aggregated +
without torus +  and separating +
coherent +
hairy +  and glabrous +
globose +  and conical +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
dryish +  and fleshy +
Swamps, bogs, fens, stream banks, moist woods, bluffs, gravel sites, sandy soil +
eglandular or +  and sparsely densely glandular +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
glabrous or +  and sparsely densely pubescent +
umbelliform +  and 1-3-flowered +
terminal +  and axillary +
glabrous or +  and sparsely densely pubescent +
crassinucellate +
5-foliate +  and ternate +
deciduous +
ovate +  and elliptic +
1.7 cm17 mm <br />0.017 m <br /> (15 cm150 mm <br />0.15 m <br />) +
revolute +  and finely coarsely crenate +
inferior +  and superior +
clustered +, biseriate +  and superposed +
collateral +  and apical +
1 +  and 2 +
stipitate-glandular +  and long-hairy +
0 (?) +  and 5 (?) +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
White (?) +  and Pink (?) +
free +  and distinct +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
8 cm80 mm <br />0.08 m <br /> (10 cm100 mm <br />0.1 m <br />) +
4 cm40 mm <br />0.04 m <br /> (6 cm60 mm <br />0.06 m <br />) +
4 cm40 mm <br />0.04 m <br /> (8 cm80 mm <br />0.08 m <br />) +
rhombic +  and obovate +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering May–Jul. +
adnate +, free +, connate +  and distinct +
erect +  and retrorse +
sparse to dense +
not +  and broad-based +
Med. Repos., hexade +
not arillate +
eglandular +, armed +  and unarmed +
persistent +
free +  and distinct +
reflexed +  and spreading +
stipitate-glandular +, hairy +  and glabrous +
lanceolate +  and long-caudate +
Endemic +  and Illustrated +
free +  and distinct +
shorter to longer +
not +  and rooting +
annual +, perennial +  and biennial +
scrambling +  and mounding +
ascending +, arching +  and erect +
1 +  and several +
angled +  and terete +
palmate +  and pinnate +
1.2 cm12 mm <br />0.012 m <br /> (2 cm20 mm <br />0.02 m <br />) +
adnate +  and free +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
persistent +
distinct +
clavate +
slender +
R. pubescens var. pilosifolius +
Rubus pubescens +
species +
inconspicuous +
convex +  and conic +
enlarged +  and small +
fibrous +  and woody +