Rosaceae: Rosoideae - drupelets

BOT 360F - Families of Vascular Plants

Drupelets are fleshy fruits that develop from the pistils of an apocarpous gynoecium. In each one the inner part of the ovary wall becomes hard and woody, while the outer part remains soft and may be invested with sugars and water, or with lipids. These nutrients may serve as food rewards for potential animal dispersal vectors, i.e. they may represent adaptations for endozoochory.

Flowers of Rubus (blackberries, raspberries, etc.) in Rosaceae subfamily Rosoideae develop into aggregates of drupelets.

Rubus odoratus flower - 22514 Bytes
Rubus odoratus fruit - 27637 Bytes

Rubus odoratus (flowering raspberry), flower and fruit (aggregate of drupelets).

Photo: R. Presgrave 1998 Royal Ontario Museum (TRT 1913, 1916)


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Please send your comments to tim.dickinson@utoronto.ca; last updated 17-Nov-2008