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This genus is accepted, and its native range is Coasts of Tropical & Subtropical Old World to W. Pacific.
Cymodocea nodosa

[FSOM]

M. Thulin et al. Flora of Somalia, Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Vegetative Multiplication Rhizomes
Rhizome herbaceous, monopodial, bearing at each node 1–2(–3) branched roots and distichously arranged foliage leaves, some leaves subtending a short leafy shoot; internodes 1–6 cm long
Morphology Leaves
Leaf sheath compressed, persisting longer than the leaf blade, when shed leaving an open or closed circular scar; blade flat, often narrowed at the base, up to 30 cm long, with 7–17 veins joined at the apex by a marginal commissure; apex rounded, obtuse or sometimes emarginate, with either microscopic marginal outgrowths or conspicuous marginal teeth
Morphology Reproductive morphology Flowers
Female flower terminal, sessile or shortly stalked; carpels each with a style divided into 2 slender stigmas up to 3 cm long Male flower stalked; anthers dorsally united and attached at the same level, each with a short apical process Flowers solitary, terminal on short erect shoots
Morphology Reproductive morphology Fruits
Fruit with a stony pericarp, laterally compressed, semicircular or semiovate in outline with dorsal ridges.
Distribution
Genus of three species with a wide but disjunct distribution. Two species are widely distributed in the tropical and subtropical Indian and western Pacific Oceans.

[FTEA]

Cymodoceaceae, Henk Beentje. Flora of Tropical East Africa. 2002

Morphology General Habit
Submerse aquatic herbs
Vegetative Multiplication Rhizomes
Rhizome creeping, monopodial, with many vascular bundles; each node with 1– 5 branched roots and a short erect stem bearing 2– 7 leaves; scales ovate, scarious
Morphology Leaves
Leaves with the sheath compressed, bi-auriculate, ligulate, persisting longer than the blade, leaving a scar when shed and giving the stem an annular appearance; blade linear, margins entire but for the distal part which becomes serrulate or spinulose, apex ± toothed; nerves 7– 17, with perpendicular cross-veins
Morphology Reproductive morphology Flowers
Flowers solitary and terminal, enclosed in a leaf similar to others, a bud in the axil of the penultimate leaf lengthening to give rise to a sympodium Staminate flowers stalked, of 2 dorsally connate anthers, attached at the same height, each crowned by subulate tip Pistillate flowers sessile or shortly stalked, of 2 free ovaries each with a short style, distally bifid
sex Male
Staminate flowers stalked, of 2 dorsally connate anthers, attached at the same height, each crowned by subulate tip
sex Female
Pistillate flowers sessile or shortly stalked, of 2 free ovaries each with a short style, distally bifid
Morphology Reproductive morphology Fruits
Fruit with stony pericarp, laterally compressed, semi-circular to elliptic in outline, with dorsal ridges and a beak.

Native to:

Albania, Aldabra, Algeria, Andaman Is., Baleares, Bismarck Archipelago, Borneo, Canary Is., Caroline Is., Corse, Cyprus, East Aegean Is., Egypt, Eritrea, France, Gambia, Greece, Hainan, India, Italy, Jawa, Kenya, Kriti, Lesser Sunda Is., Libya, Madagascar, Malaya, Maluku, Mauritania, Morocco, Mozambique, Mozambique Channel I, Myanmar, Nansei-shoto, New Caledonia, New Guinea, Nicobar Is., Palestine, Philippines, Portugal, Queensland, Sardegna, Saudi Arabia, Senegal, Sicilia, Sinai, Socotra, Solomon Is., Somalia, South China Sea, Spain, Sudan, Sulawesi, Tanzania, Thailand, Tunisia, Turkey, Turkey-in-Europe, Vanuatu, Vietnam, Western Australia, Western Sahara, Yemen, Yugoslavia

Cymodocea K.D.Koenig appears in other Kew resources:

First published in Ann. Bot. (König & Sims) 2: 96 (1806)

Accepted by

  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne.

Literature

Flora of West Tropical Africa

  • F.T.A. 8: 228
  • Graebner in Engl., Pflanzenr. 4, 11: 146 (1907).
  • in Konig & Sims, Ann. Bot. 2: 96 (1805)

Flora of Somalia

  • Flora Somalia, Vol 4, (1995) Author: by G. Sartoni [updated by M. Thulin 2008]

Flora of Tropical East Africa

  • Endl., Gen. Pl. 3: 230 (1837)
  • Hartog, Sea-grasses of the World: 160 (1970)
  • in Ann. Bot. 2: 96 (1805)

Flora of Somalia
Flora of Somalia
http://creativecommons.org/licenses/by-nc-sa/3.0

Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0