Vascular Plants of North Carolina
Section: Common Name: Scientific Name: Family:
Account for Long-leaved Panicgrass - Coleataenia longifolia ssp. longifolia   (Torrey) Soreng
Members of Poaceae:
Members of Coleataenia with account distribution info or public map:
Flora of SE USGoogle Images
Section 5 » Family Poaceae
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Author(Torrey) Soreng
DistributionCoastal Plain and Sandhills; several populations in lower Piedmont; scattered in upper Piedmont and low Mountains.

N.S. and NH to IN, south to FL and TX.
AbundanceFrequent in Coastal Plain and Sandhills; Rare in Piedmont and Mountains.
HabitatWet streamhead ecotones, wet pine savannas and flatwoods with seepage, pitcher-plant bogs.
PhenologyFlowering and fruiting July-October.
IdentificationBoth subspecies of C. longifolia have slender stems and leaves compared with our other members of the genus (2-7 mm wide vs. 4-12). Leaves also appear shorter, although measurements are not available. Both subspecies lack rhizomes, contra our other members of the genus. Subspecies longifolia differs from combsii by shorter spikelets (2.2-2.7 mm vs. 2.6-3.8 in FNA) and seepage habitat.
Taxonomic CommentsIn older texts Panicum longifolium var. longifolium.

Members of the genus Coleataenia have been split from Panicum by the subsessile spikelets (nearly stalkless, vs. stalk greater than 2 mm long) and spikelets which grow only on one side of each branch (vs. essentially on all sides). C. anceps and C. rigidula have lower stems relatively flattened, unlike Panicum.
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B.A. SorrieFish hatchery, NW end McKinney Lake, wet seepy ecotone, Aug 2011. Subspecies longifolia. RichmondPhoto_natural
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