biodiversity homepage      

Observations by Gary Fewless for Green Bay WI (Lat.N 44.51° Long. W 88.02° ), except as noted. For flowers lacking conspicuous petals or sepals I define "anthesis" as release of pollen by mature anthers.

Speckled Alder

Speckled Alder (Alnus rugosa). Speckled Alder is often called Tag Alder in Northeastern Wisconsin. It typically grows in moist to wet soils and in mostly sunny sites. Speckled Alder is one of the first "wild" plants to flower each spring (usually only Silver Maple and Skunk Cabbage bloom earlier). It has long male "catkins" which open very early and shorter female catkins which mature over summer and, after dropping their seeds, persist into the next year (see below). The leaves have not begun to emerge when the plant is in flower.

Speckled Alder in Trees of Wisconsin


© 2001-2004 The Cofrin Center for Biodiversity and the University of Wisconsin Green Bay, All Rights Reserved
Last updated on May 20, 2015