Jepson eFlora: Taxon page
Key to families | Table of families and genera
Previous taxon Index to accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Next taxon
Sparganium natans

Higher Taxonomy
Family: TyphaceaeView DescriptionDichotomous Key

Habit: Perennial herb, glabrous; monoecious; rhizomes or stolons long; colonial, in wet soil to aquatic. Stem: aerial stem 1, +- cylindric. Leaf: basal and cauline, alternate, 2-ranked, spongy; sheath open; ligule 0; blade +- linear. Inflorescence: spike-like or of spheric, unisexual heads; staminate flowers or heads distal to pistillate ones. Flower: small, densely-packed. Staminate Flower: filaments fused proximally. Pistillate Flower: pistil 1, ovary superior, ovules 1--2(4). Fruit: follicle, splitting in water, or drupe-like.
Genera In Family: 2 genera, +- 32 species: worldwide.
eFlora Treatment Author: S. Galen Smith
Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Genus: SparganiumView DescriptionDichotomous Key

Common Name: BUR-REED
Habit: Plants generally submerged except inflorescence, or vegetative when all-submerged (emergent to +- terrestrial); rhizomes, stolons slender. Stem: unbranched proximal to inflorescence. Leaf: blade flat to convex, 3-sided, or abaxially keeled. Inflorescence: heads axillary and terminal, 2--60+; bracts leaf-like, distal reduced. Staminate Flower: stamens 2--8. Pistillate Flower: ovary chambers 1--2(4), stigmas generally 1(2--4). Fruit: drupe-like, spongy; perianth parts attached, style and generally stigmas persistent as beak; floating, water-dispersed.
Species In Genus: +- 17 species: northern temperate, western Pacific. Etymology: (Probably Greek: swaddling band, for strap-shaped leaves) Note: Fruit head diam including fruit beaks; fruit body lengths except beak, stalk-like base; beak lengths including stigmas.

Sparganium natans L.
Habit: Plants generally aquatic, limp, <= 20(100) cm, distal parts floating. Leaf: widest blades 1--4(10) mm wide, flat or convex. Inflorescence: emergent; branches 0; staminate heads 1--2, crowded in flower; pistillate heads 1--3, axillary, sessile, +- 0.7--1.2 cm diam in fruit. Flower: perianth parts not dark-thickened distally; stigma 0.3--0.8 mm. Fruit: body 2--4 mm, distally rounded or narrow-tapered; beak 0.5--1.5 mm. Chromosomes: 2n=30.
Ecology: Shallow water, ponds, marshes, wet meadows, bogs; Elevation: 600--2400 m. Bioregional Distribution: e KR, CaRH, n&c SNH, MP; Distribution Outside California: to Alaska, eastern North America; circumboreal. Flowering Time: Jun--Aug Note: Some specimens +- intermediate with Sparganium angustifolium.
eFlora Treatment Author: S. Galen Smith
Jepson Online Interchange
Listed on CNPS Rare Plant Inventory

Previous taxon: Sparganium eurycarpum var. greenei
Next taxon: Typha

Name Search
botanical illustration including Sparganium natans


Citation for this treatment: S. Galen Smith 2016. Sparganium natans, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 01, 2016.

Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora,, accessed on May 01, 2016.

Sparganium natans
click for enlargement
© 2009 Keir Morse
Sparganium natans
click for enlargement
© 2009 Keir Morse
Sparganium natans
click for enlargement
© 2009 Keir Morse

More photos of Sparganium natans in CalPhotos

Geographic subdivisions for Sparganium natans:
e KR, CaRH, n&c SNH, MP;
Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
map of distribution 1
(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).

View elevation by latitude chart
Data provided by the participants of the Consortium of California Herbaria.
View all CCH records

CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.