Vascular Plants of North Carolina
Account for Yellow Hatpins - Syngonanthus flavidulus   (Michaux) Ruhland
Members of Eriocaulaceae:
Only member of Syngonanthus in NC.
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Section 5 » Order Eriocaulales » Family Eriocaulaceae
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Author(Michaux) Ruhland
DistributionPresent in the southern 35% of the Coastal Plain, but not ranging westward to the Sandhills proper. Occurs north to southeastern Cumberland, Sampson, and Craven counties.

This is a Southern Coastal Plain species, ranging from southeastern NC south to southern FL and west to MS.
AbundanceUncommon and rather local, mainly in regions where Longleaf Pine (Pinus palustris) stands are present. This is a Watch List species.
HabitatThis species occurs in similar habitats as with Lachnocaulon and Eriocaulon species -- damp to wet sandy soils associated with pinelands. It grows in wet spots in pine savannas, ecotones of Carolina bays, scrapes, ditches, margins of pineland pools and ponds.
See also Habitat Account for Wet, Sandy, Fire-maintained Herblands
PhenologyFlowers and fruits from May to October.
IdentificationThough this species is in a different genus than the other eight species of hatpins/pipeworts/bogbuttons in the family Eriocaulaceae, it nonetheless looks somewhat similar to many others and must be carefully identified owing to it being uncommon and a Watch List species. This species has numerous linear basal leaves, reaching about 3 inches tall and linear, but stiff and somewhat blue-green in color, with the base notably wider and flared. The several flowering scapes are different from the others in that the hairs are glandular and thus should feel somewhat sticky to the touch. Each one ranges to about 8 inches tall, and the single head is somewhat flattened in shape, much wider than high and disk-shaped, about 5.5-8 mm (about 1/4-inch) long. The head is typically somewhat cream-colored, to very pale yellow, but the common name is a misnomer, as the flowers are nowhere near yellow in color.
Taxonomic CommentsNone

Other Common Name(s)None
State RankS3
Global RankG5
State StatusW1
US Status
USACE-agcpFACW link
USACE-empFACW link
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B.A. SorrieCumberland County, 2017, moist sandy roadside edge of Big Gallberry Bay. CumberlandPhoto_natural

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