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Ruppia cirrhosa (Petagna) Grande

Spiral ditchgrass (en), Ruppie spiralée (fr), Ruppie à vrilles (fr)

Species

Angiosperms > Alismatales > Ruppiaceae > Ruppia

Characteristics

Perennial herb, graminoid, hydrophyte; height depending on depth of water; branches up to 750 mm long. Leaves alternate, apices obtuse or rounded, sheaths narrow. Scape long, spirally coiled; green or light green. Flowers exserted during anthesis. Flowering time Jan., Feb. Fruit a drupe or nutlet, oblique.
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Stems to 55 cm × 0.1--0.3 mm. Leaves 3.2--45.1 cm; blade 0.2--0.5 mm wide, apex acute. Inflorescences: peduncles with 5--30 coils, 30--300 × 0.5 mm. Flowers: pistils 4--6. Fruits 1.5--2 × 1.1--1.5 mm; gynophore 2--3.5 cm; beak lateral, erect, 0.5--1 mm. 2n = 40 (Europe).
Similar to R. maritima but leaf tips blunt or rounded and flowers on long, slender, spirally coiled peduncles, and usually found in more saline, deeper water. Mostly Dec.-Feb.
Leaves obtuse or rounded; scape long, spirally coiled, the flowers just exserted during anthesis; otherwise characters of the genus.
Similar to R. maritima but flowers on long, spirally coiled peduncles.
Life form perennial
Growth form herb
Growth support aquatic
Foliage retention -
Sexuality hermaphrodite
Pollination hydrogamy
Spread hydrochory
Mature width (meter) -
Mature height (meter) -
Root system -
Rooting depth (meter) -
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Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
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Nitrogen fixer -
Photosynthetic pathway c3

Environment

Light -
Soil humidity 10-12
Soil texture 4-6
Soil acidity -
Soil nutriment -
Hardiness (USDA) 4-10

Usage

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

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
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Productivity -

Images

Ruppia cirrhosa unspecified picture

Distribution

Ruppia cirrhosa world distribution map, present in Albania, Bulgaria, Belarus, Canada, China, Colombia, Cayman Islands, Cyprus, Germany, Denmark, Algeria, Egypt, Spain, Finland, France, Micronesia (Federated States of), Greece, Indonesia, Ireland, Iran (Islamic Republic of), Italy, Jamaica, Japan, Kazakhstan, Libya, Morocco, Namibia, Netherlands, Norway, Palau, Poland, Puerto Rico, Korea (Democratic People's Republic of), Portugal, Russian Federation, Singapore, Sweden, Turks and Caicos Islands, Tunisia, Ukraine, United States of America, and South Africa

Conservation status

Ruppia cirrhosa threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:30021662-2
WFO ID wfo-0000733703
COL ID 4TQPD
BDTFX ID 58945
INPN ID 119688
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Ruppia cirrhosa Dzieduszyckia limnobis Ruppia truncatifolia Buccaferrea cirrhosa Ruppia lacustris Ruppia occidentalis Ruppia spiralis Ruppia cirrhosa subsp. occidentalis Ruppia cirrhosa var. truncatifolia Ruppia maritima var. occidentalis Ruppia maritima var. spiralis Ruppia maritima subsp. spiralis Ruppia maritima var. pedunculata
WorldFloraDB 2024