Regularity: Regularly occurring
Regularity: Regularly occurring
Global Range: Circumboreal; in North America, Newfoundland to Alaska, south to North Carolina (listed for Georgia by Russell and Duncan 1972, but currently ranked historically by Georgia Heritage Program), Tennessee, Arkansas, Oklahoma, Colorado, Utah, Nevada, California.
Uppermost spike (at least usually) both pistillate and staminate (the similar C. limosa spike is entirely staminate); strongly bicolored pistillate scales; spikes sessile or with short pedicel; glaucous foliage. Within Section Atratae: pistillate spikes mostly sessile or nearly so (C. atratiformis has the pistillate spikes on slender peduncles 1-4 cm); stems of the season aphyllopodic, not surrounded by dried sheaths of previous years (although these may be present on old stems), perigynia densely and conspicuously papillate (C. norvegica and C. parryana have stems of the season phyllopodic or somewhat aphyllopodic, surrounded by the dried sheaths of previous years, perigynia not notable papillate) (Gleason and Cronquist 1991).
Comments: Found in a variety of wet places; most commonly listed habitats are bogs and wet meadows. Others include fens, marshes, wet shores, swamps, "marly bogs and marshes", prairie swales, wet river bottom prairie, alluvial meadows, and springs. (Correll & Correll 1972, Fernald 1950, Gleason & Cronquist 1991, Hough 1983, Lakela 1965, Larson 1993, Radford et al. 1968, Steyermark 1963, Voss 1972). Seldom-listed habitats: rocky places along the Lake Superior shore (Lakela 1965, Voss 1972), swampy or wet woods (Naczi & Bryson 1990, Steyermark 1963), and aspen groves (Weber 1990). In Ohio: "moist situations in sun or semi-shade, usually in calcareous or neutral substrates; wet prairies, fens, swamp woods, pastures, meadows, ditches; rarely on rock exposures" (unpublished material in TNC files).
Number of Occurrences
Note: For many non-migratory species, occurrences are roughly equivalent to populations.
Estimated Number of Occurrences: 81 to >300
"In sun or semi-shade" (unpubl. TNC material from Ohio); also see habitat description.
Life History and Behavior
Lower spikelets are pistillate, uppermost one is gynecandrous (Fernald 1950, Gleason and Cronquist 1991) or androgynecandrous (Radford et al. 1968) or staminate throughout (Fernald 1950). Spreads by long rhizomes. All Cyperaceae except Dichromena are wind-pollinated. The inflated perigynium allows Carex seeds to float for long periods of time (2 days to over 12 months, depending on the species), and various species are also dispersed by ants, birds, and mammals (Ridley 1930).
Molecular Biology and Genetics
Barcode data: Carex buxbaumii
Statistics of barcoding coverage: Carex buxbaumii
Public Records: 3
Specimens with Barcodes: 10
Species With Barcodes: 1
National NatureServe Conservation Status
Rounded National Status Rank: N5 - Secure
Rounded National Status Rank: N4 - Apparently Secure
NatureServe Conservation Status
Rounded Global Status Rank: G5 - Secure
Reasons: Carex buxbaumii is widespread and circumboreal, occurring throughout Canada and south to California, Utah, Colorado, Kansas, Arkansas, Tennessee, and Georgia (?).
Comments: Land-use conversion, habitat fragmentation, and bog succession are low-level threats to this species (Southern Appalachian Species Viability Project 2002).
Carex buxbaumii is a species of sedge known by the common name Buxbaum's sedge. It is native to much of the northern Northern Hemisphere, from Alaska to Greenland to Eurasia and including most of Canada and the United States. It grows in wet habitat, such as marshes and fens. This sedge grows in clumps from long rhizomes. The stems are 75 to 100 centimeters in maximum height. The leaves are narrow and small. The inflorescence has a bract which is sometimes longer than the spikes. The fruits have dark-colored bracts and a sac called a perigynium which is gray-green and rough in texture.
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