Prepared by Jennifer L. D’Appollonio, Assistant Scientist, University of Maine, Orono, ME 04469. Updated February 2018.
Scientific name: Rubus spp.
Common name(s): blackberry, bramble
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– two types of canes: primocanes (1st yr, vegetative) and floricanes (2nd yr, bears flowers)
– usually have palmate leaves with 5-7 leaflets; floricane leaves can have 3 leaflets
– large prickles similar to rose thorns, sometimes hairy branches 4″-12″ long.
– can be difficult to identify species without flowers/fruit, both because Rubus species hybrids are common and because plants in wild blueberry fields are mowed/burned regularly
– may be confused with other Rubus such as raspberries and black raspberries, but fruit ripens later and center portion (rasp) comes off with the fruit (not hollow as in raspberries)
– generally flowers late May to late July in ME
Hansen, R.W., S.B. Hansen and E.A. Osgood. 1991. Reproductive phenologies of selected flowering plants in eastern Maine forests. ME Agric. Exp. Station Tech. Bull. 143. 17 pp.