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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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TYPHACEAE

CATTAIL FAMILY

Perennial from long rhizomes, colonial, glabrous, generally aquatic (submersed to emergent), monoecious
Stem erect and stiff or submersed and floating above, cylindric, solid
Leaves basal and cauline, alternate, ± 2-ranked, spongy or stiff; sheath open; blade linear, flat, keeled, or triangular in X -section, spongy
Inflorescence spike-like (cylindric, dense) or head-like (spheric), terminal or axillary; staminate above pistillate, generally on same axis; flowers subtended by 1, minute bract
Staminate flower: perianth parts 0 or 1–6 and scale-like; stamens 1–8
Pistillate flower: perianth parts 0 or 1–6 and flattened; ovary 1, chambers 1–2(3), ovules 1–2(3)
Fruit: achene; wall thin, splitting in water
Genera in family: 2 genera, ± 25 species: worldwide. Sparganium formerly treated in Sparganiaceae. Family description and key to genera by R.F. Thorne.

SPARGANIUM

BUR-REED

Robert F. Thorne

Perennial from slender or corm-like rhizomes, glabrous, aquatic (submersed or emergent)
Stem slender, cylindric, solid; upper part erect or floating
Leaf: blade long, flat, keeled, or triangular, sometimes floating, spongy
Inflorescence head-like, spheric, axillary and terminal, sessile or short-peduncled; bracts leaf-like, gradually reduced upward; flowers sessile, each generally subtended by 1 bractlet
Staminate flower: perianth parts 1–6, scale-like; stamens 1–8, filaments free or fused at base
Pistillate flower: perianth parts 1–6, oblanceolate to spoon-like, greenish, persistent in fruit; ovary superior, chambers 1–2(3), ovule 1 per chamber, styles 1 or deeply 2(3)-lobed
Fruit fusiform to obconic, sessile or stalked; top tapered, truncate, or dome-like, beaked or not
Species in genus: 14 species: n temp, se Asia, sw Pacific
Etymology: (Greek: swaddling band, from long, narrow leaves)
Reference: [Cook & Nicholls 1986–7, Bot Helv 96:213–267;97:1–44]

Native

S. erectum L. subsp. stoloniferum (Graebn.) C.D.K. Cook & M.S. Nicholls

Plant generally emergent; rhizomes corm-like
Stem 2–10(15) dm, erect, ± stiff; branches below inflorescence 2–5
Leaf 5–15(35) dm, 10–20(28) mm wide, ± keeled
Staminate inflorescences 6–9, well separated
Pistillate inflorescences 1–3, generally 15–32 mm diam in fruit
Fruit 4–7 mm, 2.5–5 mm wide, obconic, irregularly creased, light brown to straw-colored, sessile; top low-conic or dome-like; beak 2–3(4) mm
Chromosomes: 2n=30
Ecology: Lakes, ponds, marshes
Elevation: < 850 m.
Bioregional distribution: North Coast, North Coast Ranges, n High Sierra Nevada, Great Central Valley, Central Coast, San Francisco Bay Area, Outer South Coast Ranges, South Coast, Peninsular Ranges, Modoc Plateau
Distribution outside California: Baja California; also in sw Asia, Australia
subsp. erectum in Eurasia
Synonyms: S. greenei Morong

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bioregional map for SPARGANIUM%20erectum%20subsp.%20stoloniferum being generated
 
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

Retrieve Jepson Interchange Index to Plant Names entry for Sparganium erectum subsp. stoloniferum
Retrieve dichotomous key for Sparganium
Overlay Consortium of California Herbaria specimen data by county on this map
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