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Alnus serrulata (Aiton) Willd.
Hazel alder, Brookside alder, Tag alder, Common alder
Synonym(s): Alnus incana var. serrulata, Alnus noveboracensis, Alnus serrulata var. subelliptica
USDA Symbol: alse2
USDA Native Status: L48 (N), CAN (N)
A multiple-trunked, suckering shrub, 12-20 ft. tall, with a picturesque habit and shiny gray-brown bark. Summer foliage is dark green and glossy, becoming yellow, tinged with red, in fall. Flowers are purple catkins; males in drooping clusters, females in upright clusters. The fruit resembles a small, woody cone and persists through Feb. Sometimes a small tree, commonly found at edge of water.
The only alder native in southeastern United States, where it is common and widespread, forming thickets.
Bloom InformationBloom Color: Red , Green , Brown
Bloom Time: Mar , Apr
Bloom Notes: Males green-brown, female reddish.
, WV Canada: NB
, QC Native Distribution:
to e. TX,
n. to s.w. N.S. (locally), c. ME,
c. VT, OH,
& s.e. MO Native Habitat:
Stream banks; bogs; swamp borders; wet meadows
Growing ConditionsWater Use: High
Light Requirement: Sun , Part Shade , Shade
Soil Moisture: Moist , Wet
Soil pH: Circumneutral (pH 6.8-7.2)
CaCO3 Tolerance: Low
Soil Description: Wet, fine sandy loams, peats & mucks.
Conditions Comments: Physiological problems are rare, however the wood is weak and breakage is common. Very flood tolerant. Alders fix nitrogen and thus serve as nutrient-giving pioneers in reclamation projects.
BenefitUse Wildlife: An intermediate source of food for wildlife.
Mr. Smarty Plants says
Alder native to Central Indiana
May 30, 2006
I am trying to find out whether there exists a plant named Alnus rugosa. I bought a plant recently that said Speckled Alder, Alnus serrulata (rugosa), but have been unable to determine if this is a c...
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National Wetland Indicator Status
This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1
(Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here
for map of regions.
Record Last Modified: 2013-09-07
Research By: TWC Staff