Jepson eFlora
Key to families | Table of families and genera

Key to Sparganium

View taxon page for Sparganium

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

1. Inflorescence main axis branches (0)1–4; staminate heads ± 10–60; stigmas > 1 on 5–100% of pistillate flowers; fruit body (except beak) ± truncate to hemispheric distally; plants ± terrestrial or emergent, not aquatic, erect ..... S. eurycarpum

2. Stigmas 2(3–4) on ± (40)60–100% of pistillate flowers; fruit body except beak 8–9 mm, 5–7 mm wide, distally ± truncate to low-rounded ..... var. eurycarpum

2' Stigmas 2 on ± 5–40% of pistillate flowers; fruit body except beak 5–8 mm, 3–6 mm wide, distally rounded to generally tapered ..... var. greenei

1' Inflorescence main axis branches 0; staminate heads <= 10; stigma 1; fruit body (except beak) distally tapered or rounded; plants terrestrial to aquatic, erect to limp

3. Staminate heads 1–2; stigma 0.3–0.8 mm; fruit beak 0.5–1.5 mm; plants generally aquatic, limp ..... S. natans

3' Staminate heads 3–7; stigma (0.6)0.8–2(2.5) mm; fruit beak >= 1.5 mm; plants terrestrial to emergent, aquatic, limp or not

4. Leaf blades ± flat, or convex, or generally some obscurely 3-angled or keeled, widest 1–5 mm wide; fruit beak 1.5–2.2 mm; staminate heads 3–4(5), crowded in flower; plants generally aquatic, limp, distal parts floating ..... S. angustifolium

4' Leaf blades generally 3-angled or keeled, especially proximally, generally obscure in pressed specimens, widest 5–13 mm wide; fruit beak (2)3–4(5) mm; staminate heads 3–7, well-separated to crowded in flower; plants generally terrestrial to emergent, erect, or aquatic and limp with distal parts floating ..... S. emersum

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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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