Vascular Plants of North Carolina
Account for Pinewoods Fingergrass - Eustachys petraea   (Swartz) Desvaux
Members of Poaceae:
Members of Eustachys with account distribution info or public map:
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Section 5 » Order Cyperales » Family Poaceae
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Author(Swartz) Desvaux
DistributionOuter Banks, other barrier islands, and the outer Coastal Plain -- north to Beaufort County.

Coastal Plain, NC to southern FL and southern TX; Mex., C.A.
AbundanceUncommon to frequent, more numerous on barrier islands than on the mainland.
HabitatMaritime stable dunes, maritime dry grasslands, upper margins of brackish marshes, sandy roadsides.
PhenologyFlowering and fruiting June-October.
IdentificationEustachys species are superficially like crabgrasses (genus Digitaria), but the spikelets are laterally compressed (vs. hemispherical in cross-section). They are much like Chloris, but the upper glumes are truncate or 2-lobed (vs. acute) and the lowest lemmas have a very short awn or none (less than 1.2 mm long vs. up to 37 mm long). E. glauca differs in being much more robust and taller (2-4 feet) and having glabrous lemmas (vs. pubescent). That species grows mainly in salt or brackish marshes, but is now historical in NC.
Taxonomic CommentsA synonym is Chloris petraea.

Other Common Name(s)Dune Fingergrass
State RankS3
Global RankG5
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B.A. SorrieSame data. DareBILPhoto_natural
B.A. SorrieSW of Hatteras Village, Oct 2013. DareBILPhoto_natural
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