Vascular Plants of North Carolina
Account for Frank's Sedge - Carex frankii   Kunth
Members of Cyperaceae:
Members of Carex with account distribution info or public map:
Google Images
Section 5 » Order Cyperales » Family Cyperaceae
Show/Hide Synonym
AuthorKunth
DistributionEssentially throughout the state; apparently scarce in the southern portion of the Coastal Plain.

Western NY to southern Ont. and NE, south to GA, AR, and OK.
AbundanceFrequent over most of the state, but rare in the southern Coastal Plain. The State Rank is clearly S5, as it occurs throughout the state.
HabitatMoist to wet bottomland forests, margins of impoundments, wet meadows. Can occur in disturbed wetlands.
PhenologyFlowering and fruiting May-July.
IdentificationCarex aureolensis can be separated from C. frankii by its wider female scales (0.4-1.1 mm vs. 0.1-0.4 mm) and wider male scales whose tips do not spread outward. Both species have rather short, "corncob" spikes with short, bristly beaks on the perigynia.
Taxonomic CommentsUntil recently, Carex aureolensis was not distinguished from C. frankii by most authors.

The genus Carex is the largest in North America, and among the largest in the world. In temperate and boreal regions, Carex is often the dominant or co-dominant ground layer in many habitats. Seeds (achenes) are valuable food for birds and small mammals, while foliage is used by birds and mammals to make nests and as food by mammals. Species of Carex often look vastly different from one another -- spikes erect vs. drooping, tiny inflorescence vs. whopping, culms leafy vs. naked, perigynia beaked vs. beakless, stems densely bunched vs. single, etc. The genus has been divided into many sections (or groups), based on shared characters; some taxonomists have suggested that these be different genera, but that proves unworkable (so far). All Carex share the feature of a perigynium (an outer covering) which completely surrounds the achene (seed). This covering may fit tightly or loosely (like a small bladder), depending on which group or species. Details of perigynia shape, ornamentation, presence and size of beak, number of striations (or veins) are all important ID features. In recent years Rob Naczi and colleagues have stressed the importance of arrangement of perigynia -- whether spiral (3+ ranks) or distichous (2-ranked) -- and have named a number of new species as well as split off some older synonyms. Therefore, RAB's (1968) key, excellent for its time, can only be used in a general way today. Members of some sections of Carex are difficult to key out (notably Ovales, Laxiflorae, Griseae); this is in part due to variation among individuals of a species, or failings of the key. FNA has drawings of most species and some species may be found in two or more places within a key, to acount for variability. New species to NC, and new to science(!), continue to be found in NC.
Other Common Name(s)None
State RankS4 [S5]
Global RankG5
State Status
US Status
USACE-agcpOBL link
USACE-empOBL link
County Map - click on a county to view source of record.
Select a source
AllHerbaria
Individual
Website
Select an occurrence type
AllCollection_naturalSight_natural