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.
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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