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Spartina alterniflora

(Atlantic Cordgrass)

Overview

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Interesting Facts

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Common Names

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Common Names in English:

Atlantic Cordgrass, Salt Marsh Cordgrass, Salt-Water Cordgrass, Saltmarsh Cordgrass, Smooth Cordgrass, Smooth Cordgrass Spartina Alterniflora

Description

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Genus Spartina

Perennials , usually with wide spreading scaly rhizomes. Culms erect , robust . Leaf blades long, tough; ligule a line of hairs . Inflorescence of racemes , these subdigitate or disposed along an axis, few to many; spikelets appressed or pectinate ; rachis triquetrous , terminating in a naked point . Spikelets strongly laterally compressed , lanceolate or narrowly oblong , floret 1, without rachilla extension , disarticulating below glumes and falling entire; glumes unequal, keeled ; lower glume shorter than floret; upper glume longer than floret, papery , 1-3-veined, sometimes additional veins present, apex narrowly acute to shortly awned ; lemma keeled, firm with wide membranous margins , lateral veins obscure, apex subacute ; palea equaling or exceeding lemma. Lodicules often absent. Caryopsis fusiform , embryo nearly as long as caryopsis. x = 10.

Seventeen species: both coasts of the Americas, Atlantic coasts of Europe and Africa, especially in temperate and subtropical regions; two species (both introduced ) in China.

This genus is adapted to the saline environment of the coast. Species with spreading rhizomes form colonies in tidal saltmarshes and are particularly suitable for stabilizing coastal mud flats.[1]

Physical Description

Species Spartina alterniflora

Perennial with soft fleshy rhizomes. Culms stout, forming large clumps , erect , (0.5-) 1-2(-3) m tall, ca. 1 cm in diam. Leaf sheaths mostly longer than internodes, smooth ; leaf blades linear-lanceolate, flat, 10-90 × 1-2 cm, smooth or margins minutely scabrous , tapering to long hard involute apex; ligule ca. 1 mm. Racemes racemosely arranged, (5-) 10-20, 5-20 cm, slender, erect or slightly spreading ; spikelets scarcely overlapping; rachis smooth, terminating in a bristle up to 3 cm. Spikelets ca. 10 mm, glabrous or nearly so; lower glume linear , 1/2-2/3 as long as spikelet, acute; upper glume ovate-lanceolate, as long as spikelet, glabrous or with very short hairs on keel, subacute ; lemma lanceolate-oblong to narrowly ovate , glabrous; palea slightly longer than lemma. Anthers 5-6 mm. 2n = 62. [source]

Habit: Graminoid

Size/Age/Growth

Size: 24-36" tall.

Habitat

Tidal mudflats of coast, introduced [2].

Typically found in the intertidal zone at the water's edge at a mean distance from sea level of 48 meters (159 feet).[3]

Biome: Coastal.

Biology

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Reproduction

Duration: Perennial

Growth

Culture: Space 24-36" apart.

Sunlight: Sun Exposure: Full Sun .

Taxonomy

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Synonyms

Spartina alterniflora var. glabra (Muhl. Ex Bigelow) Fern. • Spartina alterniflora var. pilosa (Merr.) Fern. • Spartina glabra Muhl. ex Elliott var. alterniflora (Loisel.) Merr. • Spartina glabra Muhlenberg ex Elliott var. alterniflora (Loiseleur) Merrill • Spartina maritima (Curtis) Fernald Var. alterni-Flora (Loiseleur) St. -Yves • Spartina stricta Roth var. alterniflora (Loiseleur) A. Gray • Trachynotia alterniflora (Loiseleur) Candolle.

Notes

Name Status: Accepted Name .

Last scrutiny: 15-Mar-2000

Similar Species

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Members of the genus Spartina

ZipcodeZoo has pages for 15 species, subspecies, varieties, forms, and cultivars in this genus:

S. alterniflora (Atlantic Cordgrass) · S. anglica (Common Cord Grass) · S. bakeri (Sand Cordgrass) · S. caespitosa (Short Cordgrass) · S. cynosuroides (Big Cordgrass) · S. densiflora (Denseflower Cordgrass) · S. foliosa (California Cordgrass) · S. gracilis (Alkali Cordgrass) · S. maritima (Small Cordgrass) · S. patens (Marshhay Cordgrass) · S. pectinata (Cord Grass) · S. pectinata 'Aureomarginata' (Prairie Cord Grass) · S. spartinae (Gulf Cordgrass) · S. townsendii (Townsend's Cordgrass) · S. × townsendii (Townsend's Cordgrass)

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal November 22, 2007:

Identifiers

Footnotes

  1. Bi-xing Sun & Sylvia M. Phillips "Spartina". in Flora of China Vol. 22 Page 1, 488, 493. Published by Science Press (Beijing) and Missouri Botanical Garden Press. Online at EFloras.org. [back]
  2. "Spartina alterniflora". in Flora of China Vol. 22 Page 493, 494. Missouri Botanical Garden Press. Online at EFloras.org. [back]
  3. Standard Deviation = 96.560 based on 256 observations. Terrestrial altitude and ocean depth information for each observation from British Oceanographic Data Centre. [back]
Last Revised: 7/15/2012