Scirpus clintonii A. Gray:
Canada (North America)
United States (North America)

Canada

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

United States

Origin: Unknown/Undetermined

Regularity: Regularly occurring

Currently: Unknown/Undetermined

Confidence: Confident

Global Range: Central Alberta to west-central Saskatchewan; Ontario and Minnesota east to New York and Maine; west Bonaventure Co., Quebec to south New Brunswick (Ball and White 1982, Kartesz 1999).

Plants densely cespitose; rhizomes absent. Culms trigonous, 7.5–36 cm, scabrous proximal to inflorescence. Leaves: basal sheaths orange to dark brown; distal leaf sheaths truncate to concave at mouth; blades (6–)15–250 × 0.5–0.8(–1) mm, equaling or shorter than culms at flowering, much shorter than culms at fruiting. Inflorescences: spikelets 3–6-flowered, 3.4–5.3 × 1.3–2.5 mm; bracts shorter than to slightly exceeding spikelets, 3–6 mm, apex mucronate or awned, awn to 1.4 mm. Spikelets: scales orange-brown to dark brown, midribs not reaching apices in distal scales, apex obtuse. Flowers: perianth bristles 3–6, pale brown, terete, equaling or shorter than achenes, scabrous; anthers 0.7–1.5 mm. Achenes compressed trigonous, 1.5–2 × 1–1.2 mm.

Scirpus clintonii A. Gray, Amer. J. Sci. Arts, ser. 2, 38: 290. 1864; S. planifolius Muhlenberg var. brevifolius Torrey

Comments: Rocky river ledges, argillaceous soils, clearings of fir forests, and prairie and open woods.

Fruiting late summer (May–Jul). Open, dry to mesic prairies, meadows, riverbanks, rock outcrops, on lime-rich substrates; 10–900 m; Alta., N.B., Ont., Que., Sask.; Maine, Mich., Minn., N.Y., Wis.

Note: For many non-migratory species, occurrences are roughly equivalent to populations.

Estimated Number of Occurrences: 81 to >300

Barcode of Life Data Systems (BOLDS) Stats
Public Records: 2
Species: 2
Species With Barcodes: 1

Canada

Rounded National Status Rank: NNR - Unranked

United States

Rounded National Status Rank: NNR - Unranked

Rounded Global Status Rank: G4 - Apparently Secure

Reasons: Fairly widespread, occurring from Minnesota to New Brunswick and in central Canada, but apparently rare to scattered across its range. This species has been overlooked and may be more abundant than we think.

Comments: New dams might destroy some large populations.

Needs: A detailed inventory might reveal enough adequately protected EO's already exist.

Comments: Treated as Scirpus clintonii in Kartesz's 1994 checklist, but treated as Trichophorum clintonii in Kartesz's 1999 flora.