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June 10, 2012
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Southeastern, New Hampshire
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This is my third Rubus species identification. There are a total of 28 species
in New England. Key:
- Principal leaves compound. Plants usually armed with prickles or stiff bristles.
- Leaves with 3 pinnately arranged or 5 palmately arranged leaflets. Mature
fruit is black.
- Inflorescence a raceme or solitary flower (not a panicle).
- First year vegetative stem (primocane) prostrate, dome-shaped. Trailing and
often rooting at the tip. Primocane not arching or erect.
- Primocane armed with broad-based prickles. Flower petals 10-25 mm long.
- Pedicels 10-60(-80) mm long, uppermost pedicel 10-20 mm long. Pedicels erect.
Inflorescence of 1-4 flowers. Pictures show the lower pedicels to be at least 50 mm
long.
- Stems thicker, 1.5-4 mm wide.
- Leaf blades hairless on the back except for the midvein and primary lateral veins.
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