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Rubus bartonianus

Barton's raspberry, bartonberry

creeping raspberry, five leaf dwarf bramble, five-leaf bramble, strawberry bramble, strawberry dwarf bramble, strawberry-leaf raspberry

Habit Shrubs, 8–25 dm, unarmed. Herbs, to 1 dm, unarmed.
Stems

erect, sparsely short-hairy, glabrescent, eglandular, not pruinose.

creeping, flowering branches erect, sparsely hairy, eglandular or sparsely stipitate-glandular, not pruinose.

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, pedately compound;

stipules broadly ovate to suborbiculate, 2–3 mm;

leaflets 3 (often appearing as if 5), lateral leaflets deeply lobed, sinuses nearly to leaflet base, terminal obovate to obovate-rhombic, (1–)1.5–2.5(–3.4) × (0.8–)1.2–2(–2.5) cm, base cuneate, margins coarsely singly or doubly serrate, apex rounded to obtuse, abaxial surfaces glabrous or sparsely hairy on midvein, eglandular or sparsely stipitate-glandular.

Inflorescences

1-flowered.

1-flowered.

Pedicels

moderately hairy, eglandular or sparsely stipitate-glandular.

sparsely hairy, eglandular or sparsely stipitate-glandular.

Flowers

bisexual;

petals white, obovate, (15–)20–25 mm;

filaments filiform;

ovaries glabrous, styles clavate, villous.

bisexual;

petals white, oblong to narrowly obovate, 6–10 mm;

filaments filiform;

ovaries glabrous, styles glabrous.

Fruits

deep red, hemispheric, to 1 cm;

drupelets 10–30, coherent, separating from torus.

red, 0.6–1 cm;

drupelets 3–6, weakly coherent, separating from torus.

2n

= 14.

Rubus bartonianus

Rubus pedatus

Phenology Flowering Mar–May. Flowering Jun–Aug.
Habitat Dry, rocky slopes Coniferous woods, forest edges, glades, meadows, bogs, stream banks, streambeds, roadsides
Elevation 300–400 m [1000–1300 ft] 20–2300 m [100–7500 ft]
Distribution
from FNA
ID; OR
[WildflowerSearch map]
[BONAP county map]
from FNA
AK; ID; MT; OR; WA; AB; BC; YT; ne Asia
[WildflowerSearch map]
[BONAP county map]
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.)

Rubus pedatus is recognized by its creeping, unarmed stems, pedately 3–5-foliate leaves, relatively small flowers, white petals, and glabrous ovaries.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Source FNA vol. 9, p. 36. FNA vol. 9, p. 49.
Parent taxa Rosaceae > subfam. Rosoideae > tribe Rubeae > Rubus Rosaceae > subfam. Rosoideae > tribe Rubeae > Rubus
Sibling taxa
R. allegheniensis, R. arcticus, R. bifrons, R. caesius, R. canadensis, R. chamaemorus, R. cuneifolius, R. deliciosus, R. flagellaris, R. glaucifolius, R. hispidus, R. idaeus, R. illecebrosus, R. laciniatus, R. lasiococcus, R. leucodermis, R. neomexicanus, R. nivalis, R. niveus, R. nutkanus, R. occidentalis, R. odoratus, R. parviflorus, R. parvifolius, R. pascuus, R. pedatus, R. pensilvanicus, R. phoenicolasius, R. pubescens, R. repens, R. saxatilis, R. setosus, R. spectabilis, R. trivialis, R. ulmifolius, R. ursinus, R. vestitus
R. allegheniensis, R. arcticus, R. bartonianus, R. bifrons, R. caesius, R. canadensis, R. chamaemorus, R. cuneifolius, R. deliciosus, R. flagellaris, R. glaucifolius, R. hispidus, R. idaeus, R. illecebrosus, R. laciniatus, R. lasiococcus, R. leucodermis, R. neomexicanus, R. nivalis, R. niveus, R. nutkanus, R. occidentalis, R. odoratus, R. parviflorus, R. parvifolius, R. pascuus, R. pensilvanicus, R. phoenicolasius, R. pubescens, R. repens, R. saxatilis, R. setosus, R. spectabilis, R. trivialis, R. ulmifolius, R. ursinus, R. vestitus
Name authority M. Peck: Rhodora 36: 267. (1934) Smith: Pl. Icon. Ined. 3: plate 63. (1791)
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