Jepson Interchange (more information)
Print edition is available from the University of California Press
|
This page is based on the 1993 Jepson Manual.
Please see the Jepson eFlora for up-to-date information about California vascular plants. |
| Jepson Flora Project: Jepson Interchange |
|
|
TREATMENT FROM THE JEPSON MANUAL |
previous taxon |
next taxon
Jepson Interchange (more information) |
|
©Copyright 1993 by the Regents of the University of California
Print edition is available from the University of California Press |
| The second edition of The Jepson Manual (2012) is available from the University of California Press | |
| See also the Jepson eFlora, which parallels the Second Edition |
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.
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 |
Plant generally emergent
Stem 2–5(8) dm, erect, simple
Leaf 2–6(8) dm, 4–10 mm wide, keeled or triangular below middle (submersed leaves < 22 dm, < 18 mm wide, flat or slightly keeled)
Staminate inflorescences generally 4–7, well separated
Pistillate inflorescences generally 3–4, 12–20(25) mm diam in fruit; lowest on separate peduncle
Fruit 3.5–5.5 mm, ± 2–2.5 mm wide, fusiform, slightly narrowed at middle, brown, shiny
Chromosomes: 2n=30
Ecology: Lakes, ponds, marshes, streams
Elevation: < 2600 m.
Bioregional distribution: North Coast, Klamath Ranges, Outer North Coast Ranges, High Cascade Range, High Sierra Nevada, San Bernardino Mountains, Modoc Plateau
Distribution outside California: to Alaska, Canada
Another subsp. in Eurasia
Synonyms: S. multipedunculatum (Morong) Rydb.; S. simplex Huds
| 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). |
|