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