Aquatic and Wetland Vascular Plants of the Northern Great Plains
62. Cyperaceae, the Sedge Family
2. Carex L. -- Sedge24. Carex hallii Olney
Loosely tufted from short rootstocks, also producing long rhizomes; culms weakly trigonous below to sharply trigonous above, 1.5-4 dm long. Leaves mainly basal, 1/4 to nearly as long as the culms, 1-3 mm wide; previous year's leaves commonly persistent at the base. Spikes 1-5, the terminal one staminate, pistillate or gynaecandrous, 1-2.5 cm long; lateral spikes usually present, all pistillate, smaller than the terminal spike; bracts obsolete to setaceous, not exceeding the head; pistillate scales brown with a green midvein and scarious margins, obtuse to cuspidate, equaling to slightly exceeding the perigynia. Perigynia green to brown, obovate, 1.5-2.3 mm long, abruptly short-beaked, the beak 0.2-0.4 mm long, entire to bidentulate, papillate and spinulose; achenes unequally trigonous, 1.2-1.7 mm long; stigmas 3. Jun--Jul. Wet meadows, springs and seepage areas; occasional, nw, c and e ND, e SD and c NE; (s Man., s to NE and CO).
Reports of C. parryana Dewey in ND are based on misidentifications of C. hallii.
 Carex hallii (from Hermann 1970). |
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