Rubus bartonianus |
Rubus arcticus |
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Barton's raspberry, bartonberry |
arctic blackberry, arctic raspberry, dwarf nagoonberry, nagoonberry |
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Habit | Shrubs, 8–25 dm, unarmed. | Herbs, 0.5–3 dm, unarmed. | ||||||||
Stems | erect, sparsely short-hairy, glabrescent, eglandular, not pruinose. |
erect, thin, weak, ± woody basally, glabrous or sparsely hairy, eglandular, not pruinose. |
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Leaves | deciduous, simple; stipules lanceolate, 4–6 mm; blade cordate to broadly ovate, (2–)2.5–4(–5) × (2.5–)3.5–4.5(–5.5) cm, base deeply cordate, 3–5-lobed, lobe apices acute to obtuse, margins coarsely doubly dentate, abaxial surfaces glabrous or sparsely hairy, eglandular or sparsely stipitate-glandular. |
deciduous, simple and usually 3-lobed or ternate; stipules ovate to lanceolate, 4–8 mm; blade margins dentate, serrate, or doubly serrate, abaxial surfaces sparsely to moderately pubescent, eglandular. |
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Inflorescences | 1-flowered. |
axillary, 1–3-flowered. |
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Pedicels | moderately hairy, eglandular or sparsely stipitate-glandular. |
glabrous or sparsely to moderately pubescent, eglandular or stipitate-glandular. |
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Flowers | bisexual; petals white, obovate, (15–)20–25 mm; filaments filiform; ovaries glabrous, styles clavate, villous. |
bisexual; petals pink to rose or magenta, obovate to oblanceolate, 8–25 mm; outer filaments dilated basally, inner filiform; ovaries glabrous or sparsely hairy, styles filiform. |
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Fruits | deep red, hemispheric, to 1 cm; drupelets 10–30, coherent, separating from torus. |
reddish to dark purple, globose, to 1 cm diam., rarely larger; drupelets (10–)15–30, weakly coherent, separating with torus attached. |
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Rubus bartonianus |
Rubus arcticus |
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Phenology | Flowering Mar–May. | |||||||||
Habitat | Dry, rocky slopes | |||||||||
Elevation | 300–400 m (1000–1300 ft) | |||||||||
Distribution |
ID; OR
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AK; CO; ME; MI; MN; MT; OR; WA; WY; AB; BC; MB; NT; NU; ON; QC; SK; YT; Eurasia
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Discussion | Of conservation concern. Rubus bartonianus is distinguished from the other flowering raspberries within its geographic range by its erect, unarmed stems, relatively small, simple leaves with acute to obtuse lobes, deeply cordate bases, sparsely hairy or glabrous abaxial surfaces, relatively large flowers with white petals, and densely long-hairy, clavate styles. The leaves superficially resemble those of Acer glabrum or some species of Ribes. Rubus bartonianus is most similar to R. neomexicanus but especially R. deliciosus. The species is known only from the Snake River Canyon of Idaho and Oregon. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Subspecies 3 (3 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 9, p. 36. | FNA vol. 9, p. 35. | ||||||||
Parent taxa | Rosaceae > subfam. Rosoideae > tribe Rubeae > Rubus | Rosaceae > subfam. Rosoideae > tribe Rubeae > Rubus | ||||||||
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Subordinate taxa | ||||||||||
Name authority | M. Peck: Rhodora 36: 267. (1934) | Linnaeus: Sp. Pl. 1: 494. (1753) | ||||||||
Web links |