Rubus allegheniensis
Rubus niveus
alleghaney blackberry, Alleghany blackberry, Allegheny blackberry, common blackberry, prairie rose, ronce des alléghanys, sow-teat berry
Hill raspberry, Mysore, snowpeaks, snowpeaks raspberry
biennial, erect-arching, sparsely to densely hairy, sparsely to abundantly stipitate-glandular, glands usually flattened to cupulate, not pruinose;
prickles sparse to dense, erect or slightly retrorse, stout, 4–10 mm, broad-based.
biennial, erect to arching, often scrambling, sparsely hairy, glabrescent, eglandular, strongly pruinose;
prickles sparsely to moderately dense, hooked to reflexed, stout, 3–9 mm, broad-based.
deciduous, palmately compound, not lustrous;
stipules filiform to narrowly lanceolate, (2–)5–15(–20) mm;
leaflets (3–)5(–7), terminal ovate to lanceolate, 7–16 × 4–9 cm, base rounded to shallowly cordate, unlobed, margins finely to coarsely serrate or doubly serrate, apex acuminate to long-attenuate, abaxial surfaces with hooked prickles on midveins, moderately hairy, moderately to densely stipitate-glandular on veins.
deciduous, pinnately compound;
stipules linear-lanceolate, 4–8 mm;
leaflets (3–)5–7(–9), terminal ovate to broadly ovate, 4–6.7 × (2.4–)3.4–5.4 cm, base shallowly cordate, sometimes shallowly 3-lobed, margins coarsely serrate to doubly serrate, apex acute to short-acuminate, abaxial surfaces with scattered, reflexed, broad-based prickles on midveins, densely white-tomentose, eglandular.
terminal on short shoots, sometimes appearing axillary, (5–)15–25-flowered, racemiform, often elongate.
terminal and axillary, 1–11-flowered, cymiform.
unarmed or prickles sparse, hooked, densely hairy, densely short- to long-stipitate-glandular.
prickles absent or sparse, erect to reflexed, pubescent, eglandular.
bisexual;
petals white, obovate to elliptic, rarely suborbiculate, 8–20 mm;
filaments filiform;
ovaries glabrous or glabrate.
bisexual;
petals pink to magenta, broadly obovate to orbiculate, 4 mm;
filaments laminar;
ovaries densely hairy.
black, globose to cylindric, 1–2 cm;
drupelets 20–100, strongly coherent, separating with torus attached.
purple-black, hemispheric to globose, 0.5–1.5 cm;
drupelets 50–75, coherent, separating from torus.
= 14, 21, 28.
= 14.
Rubus allegheniensis
Rubus niveus
Rubus allegheniensis consists of erect-arching, usually well-armed plants, usually densely stipitate-glandular with flattened to cupulate glands, particularly about the inflorescence.
The Menominee, Meskwaki, and Potawatomi used root extracts of Rubus allegheniensis to treat eye irritation (H. H. Smith 1923, 1928, 1933). The Ojibwa used boiled extracts of the canes as a diuretic and a root extract for treating diarrhea (Smith 1932). Rubus allegheniensis is introduced in British Columbia and California, where rare and in at least California probably no more than a waif.
Rubus montanus (Porter) Porter, a name that has been used for this species, is a later homonym of R. montanus Libert ex Lejeune.
The following nothospecies names are based on putative hybrids involving Rubus allegheniensis and: R. canadensis (R. ×forestalis L. H. Bailey, R. ×immanis Ashe); R. flagellaris (R. ×boyntonii Ashe, R. ×fraternalis L. H. Bailey [based on R. ×fraternus Brainerd & Peitersen (not R. fraternus Gremli), R. ×licens L. H. Bailey, R. ×ostryifolius Rydberg); R. pensilvanicus (R. ×avipes L. H. Bailey, R. ×floricomus Blanchard, R. ×orarius Blanchard); R. setosus (R. ×abbrevians Blanchard, R. ×aculiferus Fernald, R. ×adenocaulis Fernald, R. ×angustifoliatus L. H. Bailey, R. ×ascendens Blanchard, R. ×atwoodii L. H. Bailey, R. ×clausenii L. H. Bailey, R. ×flavinanus Blanchard, R. ×frondisentis Blanchard, R. ×perspicuus L. H. Bailey, R. ×ravus L. H. Bailey).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Rubus niveus is distinguished from other raspberries by its pinnately compound leaves with 5–7 leaflets, ovate to broadly ovate terminal leaflet, leaflets with prickles on the midvein, and pink to magenta, broadly obovate to orbiculate petals. The species was introduced into southern Florida around 1949 from seeds obtained in Kenya and quickly became popular for its fruits, which are edible fresh or frozen and are often used in preserves, pies, and tarts (J. F. Morton 1987).
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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