Spartina alterniflora Loisel.

Smooth cordgrass (en), Spartine à feuilles alternes (fr)

Species

Angiosperms > Poales > Poaceae > Spartina

Characteristics

Robust perennials, (20)-50-100-(200) cm, with thick fleshy far-creeping rhizomes, forming rather open clumps. Leaf-sheath ± glabrous; cross-veinlets scattered, minute; margins often minutely ciliate below ligule. Ligule 1-2 mm, densely ciliate. Leaf-blade 8-45 cm × 6-15 mm, persistent, coriaceous, flat, glabrous, adaxially ribbed, much narrowed to fine hard tip. Culm erect, 8-30 mm diam. near base including closely ensheathing leaves. Panicles in N.Z. usually not developed, this description is from the two floriferous specimens seen: panicle c. 25 cm, erect, contracted; spikes 7-14, 5-7 cm; rachis of each spike glabrous, tipped by bristle 10-12 mm. Spikelets 14-17 mm, lanceolate, 1-flowered. Glumes very unequal, lanceolate, glabrous, subacute; lower slightly > ½ length of upper and much narrower, 1-3-nerved, upper = spikelet, 5-9-nerved. Lemma ≤ upper glume, 3-5-nerved, lanceolate, glabrous. Palea ≥ lemma, hyaline, glabrous. Anthers 3.5-6 mm. Caryopsis not seen.
More
Culms coarse, soft and fleshy, to 3 m, or in the north as low as 3 dm, sulfurously malodorous when bruised, rhizomes elongate, thick and soft, the closely imbricate scales inflated; lvs elongate, 5–15 mm wide, glabrous or nearly so; panicle narrow, 1–3 dm; spikes slender, appressed to the axis, 5–10 cm; spikelets scarcely imbricate, erect or nearly so, those on one side of the spike usually 3–8 mm apart; rachis prolonged beyond the uppermost spikelet and usually conspicuously exceeding it; spikelets glabrous or somewhat hairy; first glume linear, half to nearly as long as the lemma; second glume 10–14 mm, exceeding the lemma, its midvein scarcely or not at all prolonged beyond the thin margins; 2n=42, 56, 70. Coastal salt-marshes, mainly intertidal, smaller at the upper tidal margins; Que. and Nf. to Fla. and Tex.; also on the Atlantic coast of S. Amer. and in n. Europe.
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.
Life form perennial
Growth form herb
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination anemogamy
Spread barochory
Mature width (meter) -
Mature height (meter) 1.0 - 1.1
Root system fibrous-root rhizome
Rooting depth (meter) 0.3
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c4

Environment

Light 7-8
Soil humidity 8-9
Soil texture 1-4
Soil acidity 4-8
Soil nutriment -
Hardiness (USDA) 5-11

Usage

Uses forage medicinal
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by cuttings or seedlings.
Mode cuttings seedlings
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Spartina alterniflora unspecified picture

Distribution

Spartina alterniflora world distribution map, present in Brazil, China, France, New Zealand, and United States of America

Conservation status

Spartina alterniflora threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:422425-1
WFO ID wfo-0000900677
COL ID 4YF3V
BDTFX ID 65440
INPN ID 124424
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Rottboellia paniculata Spartina alterniflora Spartina bahiensis Spartina merrillii Spartina glabra Trachynotia alternifolia Limnetis glabra Spartina maritima f. gracilis Dactylis maritima Spartina x merrillii Spartina stricta var. maritima Spartina stricta var. glabra Spartina alterniflora var. alterniflora