Rubus ursinus |
Rubus lasiococcus |
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Pacific blackberry, trailing blackberry, dewberry, Douglasberry |
roughfruit berry, dwarf bramble, hairy-fruit smooth dewberry |
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Habit | Dioecious perennial with slender, trailing stems up to 6 m. long, abundantly armed with slender, hooked prickles. | Unarmed, pubescent, trailing perennial with stolonous, freely-rooting, herbaceous stems up to 2 m. long, the erect flowering stems up to 1 dm. long. |
Leaves | Leaves trifoliate, the lateral leaflets ovate-lanceolate, 3-7 cm. long, doubly serrate; terminal leaflet larger, deeply 3-lobed. |
Leaf blades broadly cordate-reniform, 3-6 cm. broad, shallowly to deeply 3-lobed, the lobes rounded, doubly serrate; 1-3 reduced leaves on the flowering stems. |
Flowers | Floral branches several, 1-3 dm. long, erect, bearing several leaves and 1-several flat-topped flower clusters, the inflorescence with stalked glands; calyx hairy and glandular, the 5 lobes lanceolate, 5-11 mm. long; staminate petals 5, white, elliptic-spatulate, 7-11 mm. long, with 75-100 stamens; pistillate petals broader and shorter, with numerous pistils. |
Flowers 1 or 2 on each stem; calyx puberulent, the 5 lobes lanceolate, pointed, 4-7 mm. long, reflexed; petals 5, white, 5-8 mm. long; stamens numerous, pistils 7-15. |
Fruits | Drupelets purplish-black, coherent, attached to the elongate receptacle; fruit up to 2.5 cm. long. |
Drupelets puberulent, juicy, semi-coherent, red, the fruit under 1 cm. broad. |
Rubus ursinus |
Rubus lasiococcus |
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Flowering time | April-August | June-August |
Habitat | Open to fairly dense woodlands, thickets, and balds, sea level to middle elevations in the mountains; common in logged areas. | Moist to dry woods, lowlands to subalpine. |
Distribution | Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, east to Montana.
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Occurring on both sides of the Cascades crest and in the Olympic Mountains in Washington; British Columbia to California.
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Origin | Native | Native |
Conservation status | Not of concern | Not of concern |
Sibling taxa | ||
Web links |
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