Characteristics
Ulmus thomasii Sarg.
rock elm
Rocky ridges and summits, rock outcrops, cracks and thin soils over bedrock, and woodlands. Primarily in dry soils over calcareous bedrock.
Tree
Perennial
Vascular
8
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Native Rare-State UPL, FAC+ (NWPL) FACU (NWPL EMP) FAC (NWPL NCNE) S3 (State Rank) G5 (Global Rank)
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Classification
Eudicots
Rosales
Ulmus thomasii Sarg. - rock elm
Citation
Ulmus thomasii Sarg.
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Species Distribution Map

This species has been reported in the counties highlighted in the interactive distribution map below. Click on a county to display its name.

Source
Synonyms
Plant Photos
Photo By: Elizabeth A. Spencer. Photo taken: St. Lawrence, NY: 2 June 2018 -
Ulmus thomasii_Elizabeth A. Spencer_2 June 2018_28070.jpg
Photo By: Elizabeth A. Spencer. Photo taken: St. Lawrence, NY: 2 June 2018 -
Ulmus thomasii_Elizabeth A. Spencer_2 June 2018_28071.jpg
Photo By: Elizabeth A. Spencer. Photo taken: St. Lawrence, NY: 28 August 2018 -
Ulmus thomasii_Elizabeth A. Spencer_28 August 2018_27922.jpg
Photo By: Michael Hough. Photo taken: Jefferson, NY: 11 September 2016 -
Ulmus thomasii_Michael Hough_11 September 2016_31747.jpg
Photo By: Troy Weldy. Photo taken: JEFF, NY: 26 June 2004 -
Ulmus thomasii_Troy Weldy_26 June 2004_13687.jpg
Photo By: Troy Weldy. Photo taken: JEFF, NY: 26 June 2004 -
Ulmus thomasii_Troy Weldy_26 June 2004_13688.jpg
Photo by: Kyle J. Webster. Photo taken: Jefferson Co., NY: 18 May 2019 -
Ulmus_thomasii_KWebster_05182020_01.jpg
Photo by: Kyle J. Webster. Photo taken: Jefferson Co., NY: 18 May 2019 -
Ulmus_thomasii_KWebster_05182020_02.jpg
Photo by: Sara R. Stebbins - Environmental Design & Research, Landscape Architecture, Engineering & Environmental Services, D.P.C. (EDR). Photo taken: Jefferson Co., NY: 9 Oct 2007 -
Ulmus_thomasii_SStebbins_20071009_01.JPG
Photo by: Sara R. Stebbins - Environmental Design & Research, Landscape Architecture, Engineering & Environmental Services, D.P.C. (EDR). Photo taken: Jefferson Co., NY: 9 Oct 2007 -
Ulmus_thomasii_SStebbins_20071009_02.JPG