|University of California, Berkeley|
|Jepson eFlora: Taxon page
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|Family: Rosaceae||View Description||Dichotomous Key|
|Genus: Rubus||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Rubus pensilvanicus Poir.
Habit: Plant 1--3 m, erect to arched; prickles many, stout, wide-based, straight or generally curved. Stem: (5)10--15 mm diam, 5-angled, glabrous to generally finely hairy, not glaucous, persisting 2 years, not rooting at tips. Leaf: 1st-yr stem leaves compound, leaflets 5, terminal ovate-elliptic, sharp-double-toothed, tip acuminate, abaxially gray-hairy; flower stem leaves simple or compound, leaflets 3; stipules <= 1 mm wide, thread-like to linear. Inflorescence: short, raceme-like cyme, flowers 5--10(16). Flower: sepals hairy, nonglandular; petals 10--20(30) mm, obovate to round, white; filaments thread-like; pistils > 30, styles long, slender, ovaries glabrous. Fruit: blackberry-type, black. Chromosomes: 2n=28.
Ecology: Disturbed areas; Elevation: < 1500 m. Bioregional Distribution: CA-FP; Distribution Outside California: northeastern North America. Flowering Time: Apr--Jul
Synonyms: Rubus almus (L.H. Bailey) L.H. Bailey
eFlora Treatment Author: Lawrence A. Alice
Jepson Online Interchange
Previous taxon: Rubus parviflorus
Next taxon: Rubus spectabilis
Citation for this treatment: Lawrence A. Alice 2016. Rubus pensilvanicus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=42114, accessed on May 31, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 31, 2016.