Carex davisii | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Monocots |
Clade: | Commelinids |
Order: | Poales |
Family: | Cyperaceae |
Genus: | Carex |
Subgenus: | Carex subg. Carex |
Section: | Carex sect. Hymenochlaenae |
Species: | C. davisii |
Binomial name | |
Carex davisii | |
Carex davisii, known as Davis' sedge [1] or awned graceful sedge, [2] is a species of Carex native to North America. It is listed as an endangered, threatened, or species of concern across much of edge of its range. [1] It was named in the 1820s by Lewis David de Schweinitz and John Torrey in honor of Emerson Davis (1798–1866), a Massachusetts educator and "enthusiastic student of the genus" Carex. [3] [2]
It grows up to 3 ft (0.91 m) tall, forming loose clumps, with leaves up to 1 ft (30 cm) long and about 0.3 in (8 mm) across. The underside of the leaves are typically slightly hairy, but may be glabrous (hairless), especially further west. The base of the culms and basal leaf sheathes are dark red when young, becoming brown as they age. [4] Each flowering stem has between two and five spikelets that droop at maturity from peduncles up to 1 in (25 mm) long. The terminal spikelet is staminate (male) at the base and pistillate (female) at the tip, a form known as androgynous. The mature lateral spikelets each have 12–30 plump perigynia. The perigynia are 4–5.5 mm (0.16–0.22 in) in length and 2 mm (0.08 in) across, ovoid with a short beak, and become orange-brown as they mature. The perigynia are subtended by awned scales up to 0.5 mm (0.02 in) in length, with the scale body shorter than the mature perigynia, but the awn often exceeding it in length. [5] [6] [7]
Carex davisii is distinguished from other similar species of sedges in the section Carex sect. Hymenochlaenae, such as Carex formosa , by its longer awned perigynia scales and lateral flowering spikes with one or two male flowers at the base. [6] [8]
Carex davisii is found in eastern North America, ranging from Vermont west to Ontario and North Dakota, south to Tennessee and Texas, excluding the southeast Atlantic coast. [1] It typically grows in rich floodplain forests, river bottoms, and mesic woodlands associated with large streams. [6] It can also be found in calcareous oak savannas and meadows. [9]
This species of sedge is listed as an endangered species in Connecticut and Massachusetts, endangered and extirpated in Maryland, threatened in Minnesota and New York, and as a special concern species in Tennessee. [1]
The destruction and degradation by humans of its floodplain habitat around large rivers, for agriculture and the installation of locks and dams, led to its listing as threatened in Minnesota in 1984. [6] It is also threatened by invasive species. [6]
Carex chordorrhiza, commonly called creeping sedge or string sedge, is a species of perennial plant in the family Cyperaceae with Holarctic distribution growing in acidic bogs.
Carex pauciflora, known as few-flowered sedge, is a perennial species of sedge in the family Cyperaceae native to bogs and fens in cool temperate, subarctic, and mountainous regions of the Northern Hemisphere. The specific epithet pauciflora refers to the Latin term for 'few flowered'.
Carex pensylvanica is a species of flowering plant in the sedge family commonly called Pennsylvania sedge. Other common names include early sedge, common oak sedge, and yellow sedge.
In botany, a perigynium, also referred to as a utricle, typically refers to a sac that surrounds the achene of plants in the genus Carex (Cyperaceae). The perigynium is a modified prophyll, also known as a glume, which is tissue of leaf origin that encloses the dry, one-seeded achene.
Carex klamathensis is a rare species of sedge known by the common name Klamath sedge. It is known from 15 or fewer populations in southern Oregon and three populations in the Klamath Region of northern California. It was described to science only in 2007. Its habitat includes fens and other wet habitat, on serpentine soils. It was discovered independently by botanists Peter Zika and Lawrence Janeway.
Carex lacustris, known as lake sedge, is a tufted grass-like perennial of the sedge family (Cyperaceae), native to southern Canada and the northern United States. C. lacustris us an herbaceous surface-piercing plant that grows in water up to 50 cm (1.6 ft) deep, and grows 50–150 cm (1.6–4.9 ft) tall. It grows well in marshes and swampy woods of the boreal forest, along river and lake shores, in ditches, marshes, swamps, and other wetland habitat. It grows on muck, sedge peat, wet sand or silt, in filtered or full sunlight.
Carex arctata, known as drooping woodland sedge, is a species of sedge native to eastern North America. It is sometimes called black sedge, compressed sedge, or drooping wood sedge. It occurs from Manitoba to the Maritimes in Canada, south to northwestern North Carolina, and west to Minnesota. Carex arctata grows in bogs, hardwood forests, and spruce forests.
Carex conjuncta, known as soft fox sedge, is a species of sedge that was first formally named by Francis Boott in 1862. It is endemic to the central and eastern United States.
Carex eburnea, known as ivory sedge, ebony sedge, and bristleleaf or bristle-leaved sedge, is a small and slender sedge native to North America, from Alaska and Newfoundland south to central Mexico.
Carex rosea, the rosy sedge, is a flowering plant and part of the family Cyperaceae. Synonyms for Carex rosea include Carex concoluta, and Carex flaccidula. It is native to central and eastern North America and it exists in wet to dry soils. Carex rosea can be found in shores of streams and bottomlands, as well as ponds. It is known to have good adaptations to dry-shade locations. It is an evergreen plant which is easy to grow.
Carex magellanica, or the boreal bog sedge, is a Carex species that is native to North America. It is listed as endangered in Connecticut.
Carex schweinitzii, common name Schweinitz's sedge, is a Carex species native to North America. It is a perennial.
Aristida basiramea, the forked three-awn, is a species of grass in the family Poaceae native to North America. The specific epithet basiramea means "branching from base".
Carex brevior, known as shortbeak sedge and plains oval sedge, is a species of sedge native to North America. The specific epithet brevior means "shorter" in Latin.
Carex annectens, sometimes called yellow-fruited fox sedge, is a species of sedge native to most of the eastern United States and southeastern Canada. It is common in prairies and high-water table fallow fields. In the Chicago area, its coefficient of conservatism is 3, and in Michigan, it is only 1, indicating its relatively low fidelity to high quality habitats.
Carex arctogena is a member of the sedge family (Cyperaceae) which grows in high alpine areas. It is one of the few "bipolar" species; it has populations in Greenland, Scandinavia, Russia, Canada and southern South America. Plants in the far north and south appear to be genetically identical, having taken advantage of a similar niches on opposite ends of the globe.
Carex baileyi is a sedge in section Vesicariae the genus Carex native to the Appalachian mountains in Eastern North America. It is commonly called Bailey's sedge. Carex baileyi was named in honor of Liberty Hyde Bailey by its discoverer, Nathaniel_Lord_Britton.
Carex muehlenbergii is a species of flowering plant, it is a type of sedge. It is a grass-like plant in the family Cyperaceae. Its common names include sand sedge, Muhlenberg's sedge.
Carex deweyanaDewey's sedge, short-scale sedge, is a species of sedge native to Canada and the United States.
Carex gravida, also known as heavy-fruited sedge, heavy sedge or long-awned bracted sedge, is a tussock-forming species of perennial sedge in the family Cyperaceae. It is native to southern parts of Canada and parts of the United States.