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This species is accepted, and its native range is Red Sea to Madagascar, Tropical Asia to W. Pacific.

[FSOM]

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

Vegetative Multiplication Rhizomes
Rhizome fleshy but becoming somewhat tough with age, usually mottled purple, with 2–3 sparsely branched roots and a short leafy shoot at each node; internodes 1.5–5 cm long
Morphology Leaves
Leaf sheath obconical, bright purple, 1.5–3.5 cm long, with 1 mm high ligule; blade linear, often curved, 5–20 cm long, 4–10 mm wide, with smooth margins becoming sligthly spinulose towards the apex
Morphology Reproductive morphology Flowers
Female flower subtended by a single leaf-like bract, on a bifurcate peduncle c. 2 mm long; ovary ovoid, with a curved, flattened style divided in 2 slender stigmas up to 27 mm long Male flower with c. 2 cm long stalk; anthers yellowish, 6–9 mm long, not crowned by a subulate process
Morphology Reproductive morphology Fruits
Fruit sessile, elliptic in outline, 7–9 x 4–4.5 mm, with 3 dorsal, parallel, blunt ridges.
Distribution
S2, 3, no doubt occurring also further to the north Red Sea, coasts of East Africa as far south as Madagascar, eastward in the Indian Ocean to the western Pacific.
Ecology
Below low tide level
Phenology
PHENOLOGY Flowering has rarely been observed and flowers have only occasionally been found in the Indo-Pacific.

[FTEA]

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

Morphology General Habit
Marine herb; rhizome robust, each node with 2– 3 sparsely branched roots and erect stem to 10 cm long bearing 2– 5 leaves; internodes 2– 5.5 cm long.
Morphology Leaves
Leaf with sheath bright purple, broadly triangular, 1.5– 3 cm long, the auriculae acute, 1 mm long, the ligule 1 mm long; scars open; blade linear to falcate, 6– 15 cm long, 4– 9 mm wide, base narrowed, distal margin slightly spinulose, obtuse, serrate to dentate with triangular teeth, apex rounded and serrulate; nerves 13– 17.
sex Male
Staminate flower unknown.
Morphology Reproductive morphology Flowers
Pistillate flower sessile, ovary 1.5 mm long, style 2– 4 mm long, stigmas 23– 27 mm long. Staminate flower unknown.
sex Female
Pistillate flower sessile, ovary 1.5 mm long, style 2– 4 mm long, stigmas 23– 27 mm long.
Morphology Reproductive morphology Fruits
Fruit sessile, elliptic in outline, laterally compressed, 7– 9 mm long, 3.7– 4.5 mm wide, 2 mm thick, with 3 dorsal blunt ridges, beak apical, persistent, 1 mm long.
Figures
Fig. 4.
Habitat
In tide pools, on mud, mud-covered coral or muddy sand, or in shallow water but never exposed; sea-level to 10 meters deep
Distribution
Egypt to Mozambique, Madagascar to W Pacific K7 T3 T6 T8 Z

Native to:

Aldabra, Bangladesh, Borneo, Caroline Is., Comoros, Egypt, Eritrea, India, Jawa, Kenya, Lesser Sunda Is., Madagascar, Malaya, Maluku, Mozambique, Myanmar, Nansei-shoto, New Caledonia, New Guinea, Philippines, Queensland, Saudi Arabia, Seychelles, Socotra, Somalia, Sri Lanka, Sudan, Sulawesi, Tanzania, Vietnam, Western Australia, Yemen

Oceana serrulata (R.Br.) Byng & Christenh. appears in other Kew resources:

First published in Global Fl. 4: 53 (2018)

Accepted by

  • Govaerts, R., Nic Lughadha, E., Black, N., Turner, R. & Paton, A. (2021). The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. https://doi.org/10.1038/s41597-021-00997-6 Scientific Data 8: 215.

Literature

Kew Backbone Distributions

  • Edwards, S., Demissew, S. & Hedberg, I. (eds.) (1997). Flora of Ethiopia and Eritrea 6: 1-586. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.
  • Fosberg, F.R., Sachet, M.-H., Oliver, R. (1987). A Geographical Checklist of the Micronesian Monocotyledonae Micronesica; Journal of the College of Guam 20: 19-129.
  • H?, P.-H. (1993). Câyc? Vi?tnam. An Illustrated flora of Vietnam 3(1): 1-603d. Pham-hoang Ho, Montréal.
  • Kress, W.J., DeFilipps, R.A., Farr, E. & Kyi, D.Y.Y. (2003). A Checklist of the Trees, Shrubs, Herbs and Climbers of Myanmar Contributions from the United States National Herbarium 45: 1-590.
  • Miller, A.G. & Morris, M. (2004). Ethnoflora of Soqotra Archipelago: 1-759. The Royal Botanic Garden, Edinburgh.
  • Robertson, S.A. (1989). Flowering Plants of Seychelles: 1-327. Royal Botanic Gardens, Kew.
  • Thulin, M. (ed.) (1995). Flora of Somalia 4: 1-298. The Royal Botanic Gardens, Kew.

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