Vascular Plants of North Carolina
Account for Flattened Oatgrass - Danthonia compressa   Austin ex Peck
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Members of Danthonia with account distribution info or public map:
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Section 5 » Order Cyperales » Family Poaceae
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AuthorAustin ex Peck
DistributionMountains and upper Piedmont. A disjunct record east to Mecklenburg County.

N.S. and Ont. south to northern GA and AL.
AbundanceFrequent to common throughout the mapped area. The website editors suggest a State Rank of S4, given its widespread presence throughout the Mountains and upper foothills.
HabitatRock outcrops, grassy balds, montane woodlands, woodland openings.
See also Habitat Account for Grassy Balds and Montane Semi-natural Grasslands
PhenologyFlowering and fruiting June-August.
IdentificationAs its name suggests, the stem is often compressed (at least sections of it), but this is not a very valuable key character. From the ubiquitous Poverty Oatgrass (D. spicata), it differs in the longer lemma teeth on each side of the awn (2.0-4.5 mm long vs. 0.8-1.8 mm long in D. spicata), and mature leaves are flexuous but not curled as in Poverty Oatgrass.
Taxonomic CommentsNone

Other Common Name(s)Mountain Oatgrass, Northern Oatgrass
State RankS3 [S4]
Global RankG5
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USACE-agcpFACU link
USACE-empFACU link
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