Vascular Plants of North Carolina
Account for Pine Barren Fluffgrass - Tridens ambiguus   (Elliott) J.A. Schultes
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Section 5 » Order Cyperales » Family Poaceae
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Author(Elliott) J.A. Schultes
DistributionSouthern inner Coastal Plain. Known from only a single site, a small Carolina bay in Scotland County at the SC line. Discovered there in 1992 by Julia Larke. Since then, the site has grown up to a Loblolly Pine forest and it is feared that this grass has become extirpated.

Coastal Plain, southern NC to northern FL and eastern TX.
AbundanceVery rare -- a single site shared with SC. This is a State Endangered species.
HabitatClay-based Carolina bay, with a short hydroperiod. In the past 2 decades the site has become overgrown with invading Loblolly Pines, and its very existence is threatened, along with a number of state-rare plants.
PhenologyFlowering and fruiting August-October.
IdentificationThis grass grows 2-3.5 feet tall, with most of the slender leaves in the basal half of the stem. The open inflorescence is 3-6 inches long, with red-purple spikelets that eventually fade to brown. Each spikelet has 4-6 florets.
Taxonomic CommentsNone

Other Common Name(s)Pineland Triodia, Flatwoods Fluffgrass
State RankS1
Global RankG4
State StatusE
US Status
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B.A. SorrieScotland County, 1992, State Line Prairie Bay. ScotlandPhoto_natural
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