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Agrostis mertensii Trinius. Arctic Bentgrass. Phen: Jul-Aug. Hab: In thin soil of high elevation rocky summits; also in riverside flood scour areas at much lower elevations. Dist: Circumboreal, in North America south to ME (Mt. Katahdin), NH (White Mountains), VT, NY (Adirondack Mountains), WV (Spruce Knob), TN (Roan Mountain, Abrams Creek), NC (Roan Mountain, Big Yellow Mountain, Black Mountains), QC, BC, CO, UT (?), and AK.

Origin/Endemic status: Native

Synonymy: = C, FNA24, K1, K3, K4, NE, NY, Tn, W, Tucker (1996); = Agrostis rubra L. – S13; > Agrostis borealis Hartm. – HC, RAB, S, WV; > Agrostis borealis Hartm. var. americana (Scribn.) Fernald – F, G; > Agrostis borealis Hartm. var. borealis – F; > Agrostis borealis Hartm. var. pauludosa (Scribn.) Fernald – F

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Wetland Indicator Status:

  • Eastern Mountains and Piedmont: FACU
  • Great Plains: FACU
  • Northcentral & Northeast: FACU

Heliophily: 8

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image of plant© Michael J. Oldham, some rights reserved (CC BY-NC), uploaded by Michael J. Oldham source CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Radford, Ahles and Bell | Original Image ⭷


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