Alnus serrulata (Aiton) Willd., Betulaceae

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Common name: Smooth alder.

Voucher: Kostadinov 150, (URV)

Brief description: A shrub to a small monoecious tree with a three-angled pith. Leaves are ovate to obovate simple, alternate, entire, margins  doubly serrate-toothed, pinnately veined, glabrous. Flowers are unisexual, the staminate catkins maturing before leaves develop, the pistillate ones -- becoming woody and persistent. Fruits are a small achene or samara. 

Campus data: Abundant around water ponds and streams in the shadowy places around campus. A.serrulata shrub patches comprise a conspicuous community around Westhampton lake.  Practically absent elsewhere.