Difference between revisions of "Deschampsia cespitosa"

Revision as of 12:00, 7 May 2012

Deschampsia cespitosa, commonly called tufted hairgrass, is a native perennial, tussock- forming grass. It is also called Beringian grass.

Synonyms:

Agrostis caespitosa (L.) Salisb.
Aira alpicola (Rydb.) Rydb.
Aira ambigua Michx.
Aira aristulata Torr.
Aira caespitosa Muhl.
Aira cespitosa L.
Avena caespitosa (L.) Kuntze
Campella caespitosa (L.) Link
Deschampsia alpicola Rydb.
Deschampsia ambigua P. Beauv. ex B.D. Jacks.
Deschampsia andina Phil.
Deschampsia biebersteiniana Schult.
Deschampsia caespitosa (L.) P. Beauv.
Deschampsia caespitosa ssp. genuina (Reichenb.) Volk.
Deschampsia cespitosa var. confinis Vasey ex Beal
Deschampsia cespitosa ssp. genuina (Reichenb.) Volk.
Deschampsia cespitosa var. strictior Kurtz
Deschampsia confinis (Vasey ex Beal) Rydb.
Deschampsia pungens Rydb.
Podionapus caespitosus (L.) Dulac

Taxonomy

Description

Bloom Period

Distribution

Habitat

Uses

Propagation

Photo Gallery

References

Seed

Abbreviation: DECE

Average Measurement with husk/awn: 3.4 x 0.8 x 0.8

Average Measurement without husk/awn: 1.8 x 0.6 x 0.6

Measurement Range with husk/awn: L: 2.5 – 4.5, W: 0.5 – 1, D: 0.6 – 1

Measurement Range with husk/awn: L: 1.5 – 2, W: 0.5 – 0.75, D: 0.5 – 0.6

Features

Shape: Seed narrow at hilum and opposite apex, rounded in the middle.

Additional Structures: Lemma thin, and have several nerves running across them. Awn originates from the hilum and is about 1 ½ times the length of the seed body. Hilum bearded with feather like appendage. Palea also thin.

Color: Tan palea and lemma, awn slightly darker brown. Inner seed red-brown, and somewhat transparent.

Surface: Seed finely longitudinally striate and lustrous. Awn finely barbed.

Latitudinal Cross Section: elliptical

Longitudinal Cross Section: elliptical

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 ==Taxonomy==
-Tufted hairgrass is a densely cespitose cool-season native perennial bunchgrass.  Culms are hollow, slender, erect, and 8 to 48 inches (20-120 cm) in height.  Abundant leaves form basal tufts; blades are 0.8 to 13 inches (2-33 cm) long and 0.04 to 0.16 inch (1-4 mm) wide.  The inflorescence is generally a loose, open panicle, though
-occasionally narrow and contracted; it is 4 to 12 inches (10-30 cm) long.  Branches are whorled, hairlike, and spikelet-bearing near their tips.  Spikelets are two- to occasionally three-flowered.  Lemmas are awned toward the base.  The fruit is a caryopsis.
 ==Description==