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Key to Rubus, Key B: Eurasian blackberries
1 Leaves compound, the leaflets additionally laciniately divided; leaves green beneath |
| 1 Leaves compound, the leaflets (merely) toothed; leaves grayish-tomentose beneath. |
| ..2 Prickles nearly straight; stems glabrescent; petals pale pink to deep pink |
| ..2 Prickles recurved; stems canescent above; petals white to pale pink |