1. Family: Hydrocharitaceae Juss.
    1. Halophila Thouars

      1. This genus is accepted, and its native range is Tropical & Subtropical coasts.

    [FTEA]

    Hydrocharitaceae, David Simpson. Flora of Tropical East Africa. 1989

    Habit
    Monoecious or dioecious, submerged, marine perennials
    Stem
    Stems elongate, rhizomatous or shortly erect, the latter produced from nodes at regular intervals along the rhizome
    Roots
    Roots 1(–3) at each node where the erect stems produced, simple, sand binding, covered with fine hairs
    Leaves
    Leaves in pairs, whorls or distichously arranged on the erect stems, sessile or petiolate; blade linear to ovate, acute, obtuse or rounded, cuneate or rounded at the base, opaque or somewhat translucent, usually glabrous, rarely sparsely pubescent, with 3 longitudinal veins, often connected by ascending cross-veins; margins green, entire or serrulate Nodal scales 0
    Stipules
    Stipules 2, obtuse to suborbicular or transversely elliptic, membranous, subtending each pair or whorl of leaves
    Flowers
    Flowers unisexual Male flowers pedicellate, remaining attached to the plant; tepals 3, ovate, cucullate; stamens 3, anthers sessile, linear-oblong, erect, 2–4-thecous, latrorsely or extrorsely dehiscent Female flowers with tepals 3, reduced to lobes at the apex of perianth-tube; staminodes 0; ovary of 3–5 carpels, ellipsoid or ovoid, 1-locular, placentation parietal; ovules few to many; perianth-tube narrowly cylindric; styles 3–5; stigmas 3–5, filiform, entire
    Inflorescences
    Male and ♀ spathes similar, solitary in leaf-axils, sessile, 1–2-flowered, rarely with 1 flower of each sex in the same spathe, composed of 2 free, overlapping bracts, the bracts elliptic to sub-orbicular, acuminate, obtuse, often keeled, translucent, the margins entire or serrulate
    Male
    Male flowers pedicellate, remaining attached to the plant; tepals 3, ovate, cucullate; stamens 3, anthers sessile, linear-oblong, erect, 2–4-thecous, latrorsely or extrorsely dehiscent
    Female
    Female flowers with tepals 3, reduced to lobes at the apex of perianth-tube; staminodes 0; ovary of 3–5 carpels, ellipsoid or ovoid, 1-locular, placentation parietal; ovules few to many; perianth-tube narrowly cylindric; styles 3–5; stigmas 3–5, filiform, entire
    Fruits
    Fruit ovoid to globose, membranous, opening by decay of pericarp
    Seeds
    Seeds subglobose to globose, tuberculate, reticulate or smooth.

    Images

    Distribution

    Native to:

    Aldabra, Andaman Is., Bahamas, Bangladesh, Belize, Borneo, Brazil Northeast, Canary Is., Cape Provinces, Caroline Is., Cayman Is., Chagos Archipelago, China Southeast, Colombia, Costa Rica, Cuba, Egypt, Eritrea, Fiji, Florida, Gulf States, Hainan, Hawaii, India, Iran, Jamaica, Japan, Jawa, Kenya, Korea, Kuwait, KwaZulu-Natal, Leeward Is., Lesser Sunda Is., Libya, Louisiana, Madagascar, Malaya, Maluku, Marianas, Mauritius, Mexico Gulf, Mexico Northeast, Mozambique, Myanmar, Nansei-shoto, Netherlands Antilles, New Caledonia, New Guinea, New South Wales, Nicaragua, Nicobar Is., Norfolk Is., Northern Territory, Oman, Pakistan, Palestine, Panamá, Philippines, Puerto Rico, Queensland, Rodrigues, Samoa, Saudi Arabia, Seychelles, Sinai, Society Is., Solomon Is., Somalia, South Australia, South China Sea, Sri Lanka, Sudan, Sulawesi, Sumatera, Taiwan, Tanzania, Tasmania, Texas, Thailand, Tonga, Trinidad-Tobago, Venezuela, Venezuelan Antilles, Victoria, Vietnam, Western Australia, Windward Is., Yemen

    Introduced into:

    East Aegean Is., Greece, Kriti, Sicilia

    Halophila Thouars appears in other Kew resources:

    First published in Gen. Nov. Madagasc.: 2 (1806)

    Accepted by

    • Govaerts, R.H.A. (2011). World checklist of selected plant families published update Facilitated by the Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Flora of Tropical East Africa
    • Hartog, Sea Grasses of the World: 238 (1970)
    • G.P. 3: 455 (1883)
    • Gen. Nov. Madag. 2: 2 (1806)

    Sources

    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 2019. 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 2019. 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