Juncus tenuis Willd.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Stems ± cespitose, 1–8 dm; lvs basal, 1–3 dm, a third to half the height of the stems, flat and 1–1.5 mm wide, or becoming involute, varying to subterete and merely narrowly channeled on the upper side; sheaths scarious-margined, auriculate; invol lf 1–10 cm, often surpassing the infl, but not appearing as a continuation of the stem; infl loosely branched, not secund, the fls prophyllate; tep lance-subulate, the sep 3–5.5 mm, the pet 2.8–5 mm; anthers 6, shorter than the filaments; fr oblong- ovoid or slightly obovoid, obtuse to truncate, 2.6–4.2 mm, shorter than the sep, only imperfectly trilocular, the partitions not meeting in the center; seeds 0.3–0.5 mm, merely apiculate, mucilaginous when wetted; 2n=40, 42, 80, 84. Dry or moist (often compacted) soil, abundant along forest paths; almost throughout N. Amer., and naturalized elsewhere.