Robert W. Freckmann Herbarium


Because of technology changes and personnel changes at UWSP and the Wisconsin State Herbarium, the database of plant species housed at this site was merged with the database from the OLD WisFlora website to create a new Flora of Wisconsin website at Currently we are encouraging all Wisplant viewers to begin using the Flora of Wisconsin website as soon as possible. Wisplants will remain operational through July 13th. After that date, all traffic to Wisplants will be redirected to the Flora of Wisconsin website.

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  Ulmus thomasii Sarg. image
Photographer: Robert W. Freckmann           

Matthew L. Wagner

Matthew L. Wagner

Matthew L. Wagner
Family Ulmaceae
Ulmus thomasii Sarg.
rock elm
Ulmus: the classical Latin name for the elm
thomasii: after David Thomas 1776-1819, American pomologist, florist, and agricultural writer
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Native
Plant: perennial tree to 98' tall with an oblong crown; gray bark with deep fissures of broad, flat ridges
Flower: brown, oval buds with a pointed tip; inflorescence usually 10 flowers in a long, hanging cluster; blooms in spring
Fruit:elliptic to oval samara with narrow wings and a shallow notch; seeds inflated but not thick
Leaf:obovate to oblong-oval, bases unequal, edges doubly toothed
Habitat: moist to dry; slopes, outcrops, woods, floodplains, streambanks in rocky, limy or rich soil

More Information Natural Communities Herbarium Specimens
All Ulmus list Google- Images or Text

Flora of North America (off site)
Ulmus racemosa D.Thomas 1831, non Borkh. 1800.

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