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Ulmus thomasii Sarg.
Rock elm, Cork elm
Synonym(s): Ulmus racemosa
USDA Symbol: ULTH
USDA Native Status: L48 (N), CAN (N)
Tree with usually straight trunk and narrow, cylindrical crown of short, drooping branches.
The valuable wood is hard, tough, and difficult to split, making it particularly suitable for agricultural implements and tool handles. In the 19th century, this durable timber was exported to England for construction of wooden battleships and sailing vessels.
Bloom InformationBloom Color: Yellow , Green , Brown
Bloom Time: Mar , Apr
, WV Canada: ON
, QC Native Distribution:
S. Ontario, extreme S. Quebec, and W. New England south to Tennessee, west to extreme NE. Kansas, and north to Minnesota; at 200-2500 (61-762 m). Native Habitat:
Moist to dry uplands, especially rocky ridges and limestone bluffs, also flatlands; in hardwood forests.
Growing ConditionsWater Use: High
Light Requirement: Sun , Part Shade , Shade
Soil Moisture: Dry , Moist
Soil pH: Alkaline (pH>7.2)
CaCO3 Tolerance: High
Soil Description: Clay
BenefitUse Wildlife: Birds, Other Showy Insects
Attracts: Birds , Butterflies
Larval Host: Mourning Cloak, Columbia silkmoth
Butterflies and Moths of North America (BAMONA)
is a larval host and/or nectar source for:
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: 2013-06-27
Research By: TWC Staff