Rubus allegheniensis |
Rosaceae tribe Rubeae |
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alleghaney blackberry, Alleghany blackberry, Allegheny blackberry, common blackberry, prairie rose, ronce des alléghanys, sow-teat berry |
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Habit | Shrubs, 10–30 dm, armed. | Shrubs, subshrubs, or herbs, perennial; armed or unarmed. |
Stems | 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. |
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Leaves | 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. |
alternate, imparipinnately or palmately compound or simple; stipules persistent [deciduous], free or adnate to petiole; venation pinnate or palmate. |
Inflorescences | terminal on short shoots, sometimes appearing axillary, (5–)15–25-flowered, racemiform, often elongate. |
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Pedicels | unarmed or prickles sparse, hooked, densely hairy, densely short- to long-stipitate-glandular. |
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Flowers | bisexual; petals white, obovate to elliptic, rarely suborbiculate, 8–20 mm; filaments filiform; ovaries glabrous or glabrate. |
perianth and androecium perigynous; epicalyx bractlets absent; hypanthium flat to hemispheric; torus flat or convex to conic; carpels 5–150, styles apical, distinct; ovules 2, apical, collateral, only 1 maturing. |
Fruits | black, globose to cylindric, 1–2 cm; drupelets 20–100, strongly coherent, separating with torus attached. |
aggregated drupelets; styles persistent, not elongate. |
2n | = 14, 21, 28. |
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Rubus allegheniensis |
Rosaceae tribe Rubeae |
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Phenology | Flowering May–Jul. | |
Habitat | Woodlands, savannas, prairies, meadows, rock outcrops, disturbed areas, dry to damp soil | |
Elevation | 0–1600 m (0–5200 ft) | |
Distribution |
AL; AR; CA; CT; DC; DE; GA; IA; IL; IN; KS; KY; MA; MD; ME; MI; MN; MO; NC; NE; NH; NJ; NY; OH; OK; PA; RI; SC; TN; VA; VT; WI; WV; BC; NB; NS; ON; PE; QC
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North America; Mexico; Central America; South America; West Indies; Eurasia; Africa; Pacific Islands; Australia [Introduced nearly worldwide] |
Discussion | 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.) |
Genus 1, species 250–700 (37 in the flora). The base chromosome number for Rubeae is x = 7. The tribe is host to Phragmidium rusts. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Source | FNA vol. 9, p. 34. | FNA vol. 9, p. 27. |
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Rubeae > Rubus | Rosaceae > subfam. Rosoideae |
Sibling taxa | ||
Subordinate taxa | ||
Synonyms | R. villosus var. montanus, R. acadiensis, R. allegheniensis var. calycosus, R. allegheniensis var. gravesii, R. allegheniensis var. neoscoticus, R. allegheniensis var. plausus, R. allegheniensis var. populifolius, R. alumnus, R. apianus, R. attractus, R. auroralis, R. campester, R. concameratus, R. fryei, R. glandicaulis, R. impos, R. inclinis, R. irregularis, R. licitus, R. montpelierensis, R. nigrobaccus, R. nuperus, R. paulus, R. pugnax, R. rosa, R. saltuensis, R. sceleratus | |
Name authority | Porter: Bull. Torrey Bot. Club 23: 153. (1896) | Dumortier: Anal. Fam. Pl., 39. (1829) |
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