Aquatic and Wetland Vascular Plants of the Northern Great Plains
61. Juncaceae, the Rush Family
1. Juncus L. -- Rush8. Juncus dudleyi Wieg. -- Dudley's rush
Tufted perennial 2-8 dm tall. Leaves mostly basal, arising well within the lower 1/4 of the stem; blades typically 1/3 to 1/2 the length of the stem, 0.5-1 mm wide, flat to involute; sheaths green or uncommonly faintly reddish, the margins and auricles firm and cartilaginous, drying yellowish, glossy, auricles low, rounded, to 0.5 mm long. Inflorescence compact to spreading, (1)2-5 cm long; involucres 1-3, usually 2, at least one of these exceeding the inflorescence; bracteoles obtuse to subacute, nearly transparent, 1-2 mm long. Flowers solitary, sessile to short-pedicelled, green to stramineous or light brown, 4-6 mm long; tepals acuminate, with narrowly hyaline margins, the outer noticeably longer than the inner; stamens 6. Capsules ovoid-cylindric to ovoid, 1-locular, shorter than the perianth; seeds obliquely ellipsoid, brown, 0.3-0.4 mm long. Jun--Aug. Wet meadows, springy or boggy areas, ditches, shores and stream banks; common; (Newf. to Alta. and WA, s to MD, TN, TX and CO).
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| Jancus dudleyi, inflorescence. |
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