Jepson eFlora
Key to families | Table of families and genera

Key to Schoenoplectus

View taxon page for Schoenoplectus

Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots.

1. Stem 3-sided, at least near inflorescence, where sometimes obscure

2. Inflorescence panicle-like ..... S. californicus

2A. Inflorescence head-like or spikelet 1 ..... [S. triqueter] (2)

2A' Inflorescence panicle-like (or spikelet 1)

2B. Plant 1–4 m; stem 4–10 mm diam, blunt-3-sided throughout to cylindric proximally, obscure-3-sided near inflorescence; spikelets 25–150+; perianth bristles 2–4, soft-hairy ..... S. californicus

2B' Plant 0.5–1.5 m; stem 2–4 mm diam, 3-sided; spikelets 1–35; perianth bristles 4–6, barbed ..... [S. triqueter] (2)

2' Inflorescence head-like or spikelet 1

3. Leaf blades 0; flower bract tips not notched; fruit with many wavy transverse ridges; plant tufted, rhizomes short, inconspicuous ..... S. mucronatus

3' Leaf blades 1–6; flower bract tips notched; fruit smooth; plant mat-forming, rhizomes long, conspicuous

4. Distal leaf blade < 1.5 × sheath; flower bract tip notch 0.1–0.4 mm, awn 0.2–0.6 mm ..... S. americanus

4' Distal leaf blade (1)2–5 × sheath; flower bract tip notch (0.3)0.5–1 mm, awn 0.5–2.5 mm ..... S. pungens var. longispicatus

1' Stem cylindric

5. Stem <= 1.5 mm diam; plant to 1.5 m; flower bract tip notch 0; spikelets 1–20

6. Spikelets 1–20, spreading; fruit with sharp wavy transverse ridges; plant tufted, rhizomes short, generally not evident ..... S. saximontanus

6' Spikelets 1, erect; fruit smooth; plant mat-forming, rhizomes long, evident ..... S. subterminalis

5' Stem 2–10 mm diam; plant to 4 m; flower bract tip notch present; spikelets 3–100+

7. Flower bract awns some or all markedly contorted, 0.5–2 mm (often broken off); spikelets 3–100+, in clusters of 1–8, not all 1 on 1 plant ..... S. acutus var. occidentalis

7' Flower bract awns not or ± contorted, 0.2–1 mm; spikelets 5–200, in clusters of 1(2) or 1–4(7), all 1 on 1 plant or not

8. Fruit 3-sided, 1.8–2.2 mm; stigmas 3; spikelets in clusters of 1(2) ..... S. heterochaetus

8' Fruit 2-sided, 1.5–1.8 mm; stigmas 2(3); spikelets in clusters of 1–4(7) ..... S. tabernaemontani

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Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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