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Schoenoplectus acutus ( syn. Scirpus acutus, Schoenoplectus lacustris, Scirpus lacustris subsp. acutus ), called tule / ˈtuːliː /, common tule, hardstem tule, tule rush, hardstem bulrush, or viscid bulrush, is a giant species of sedge in the plant family Cyperaceae, native to freshwater marshes all over North America.
Notes: Schoenoplectus acutus, formerly Scirpus acutus, is a common wetland species, often found in standing water up to 5 feet deep along lake and pond margins, and may form dense stands. It closely resembles two other Minnesota Schoenoplectus species: Schoenoplectus heterochaetus and Schoenoplectus tabernaemontani.
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Common Alternate Names: tule Scientific Alternate Names: Scirpus acutus. Uses. Wildlife: Livestock rarely use this species when the area is flooded. They will use it as roughage or in the winter under heavy snow cover because the stems are often protruding above the snow bank.
Naked-stemmed bulrushes, scirpes, schoenoplecte [Greek schoinos, a rush, reed, and plectos, plaited, twisted, woven, in reference to the use of culms in making useful objects] S. Galen Smith. Scirpus Linnaeus subg. Schoenoplectus Reichenbach, Icon. Fl. Germ. Helv. 8: 40. 1846. Herbs, perennial or annual, cespitose or not, rhizomatous or not.
Schoenoplectus acutus × Schoenoplectus heterochaetus → Schoenoplectus ×oblongus (T. Koyama) Soják is a rare hybrid in New England known from MA, RI, VT. It typically shows a high proportion of solitary spikelets (30–80% of the spikelets are solitary vs. 0–20% in S. acutus ).
Scirpus acutus. Common name: hard-stem bulrush or tule. Scientific name: Scirpus acutus or Schoenoplectus acutus. Plant family: Cyperaceae. Description: Scirpus acutus is a perennial monocot whose thick and stiff culms (or stalks) can grow up to 15 feet high. The inflorescence of S. acutus is composed of clusters of red-brown spikelets.
Achenes dark gray-brown, plano-convex or rarely weakly trigonous, obovoid, (1.5-)2-3 ´ 1.2-1.7 mm; beak 0.2-0.4 mm. Plants of Schoenoplectus acutus var. occidentalis that have most styles 3-fid, most achenes trigonous, and culms very soft with large air cavities occur at lower elevations in California (mostly southern) and Baja California.
