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|Family: Typhaceae||View Description||Dichotomous Key|
|Genus: Sparganium||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Sparganium emersum Rehmann
Habit: Plants generally terrestrial to emergent, erect, to 75 cm, or aquatic and limp, to 1(2) m, distal parts floating. Leaf: widest blades 5--13 mm wide, generally 3-angled or keeled proximally; on vegetative plants in deep or fast-flowing water to 2.2 m, 18 mm wide, flat, generally not keeled. Inflorescence: emergent; main axis branches 0; staminate heads 3--7, well separated to crowded in flower; pistillate heads 1--6, proximal in axils, peduncled, distal sessile, 1.3--2.5 cm diam in fruit. Flower: perianth parts not dark-thickened distally; stigma 1--2(2.5) mm. Fruit: body 3.5--4 mm, 2--2.5 mm wide, ellipsoid to fusiform, tapered distally, beak 3--4 mm. Chromosomes: 2n=30.
Ecology: +- Unpolluted freshwater habitats; Elevation: < 2600 m. Bioregional Distribution: NCo, KR, NCoRO, n&c SNH, SnBr, MP; Distribution Outside California: to Alaska, northeastern North America; circumboreal. Flowering Time: Summer Note: Locally common. Plants near coast generally robust, stiff, erect, in wet ground or shallow water; higher elevation inland plants generally slender, limp, +- submerged. Apparently intergrades with Sparganium angustifolium.
Unabridged Synonyms: Sparganium angustifolium Michx. subsp. emersum (Rehmann) Brayshaw; Sparganium chlorocarpum Rydb.; Sparganium chlorocarpum var. acaule (Beeby) Fernald; Sparganium emersum subsp. acaule (Beeby) C.D.K. Cook & M.S. Nicholls
eFlora Treatment Author: S. Galen Smith
Jepson Online Interchange
Previous taxon: Sparganium angustifolium
Next taxon: Sparganium eurycarpum
Citation for this treatment: S. Galen Smith 2017. Sparganium emersum, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=45025, accessed on March 23, 2017.
Citation for the whole project: Jepson Flora Project (eds.) 2017. Jepson eFlora, http://ucjeps.berkeley.edu/eflora/, accessed on March 23, 2017.