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  1. Family: Acanthaceae Juss.
    1. Rhinacanthus Nees

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

    [FZ]

    Flora Zambesiaca Acanthaceae (part 2) by Iain Darbyshire, Kaj Vollesen and Ensermu Kelbessa

    Habit
    Perennial herbs or subshrubs; cystoliths numerous, ± conspicuous.
    Stem
    Stems 6-angular or terete, often with short pale retrorse and/or antrorse hairs.
    Leaves
    Leaves evergreen or rarely deciduous, opposite-decussate, petiolate, pairs equal to somewhat anisophyllous; blade margin entire or obscurely repand.
    Inflorescences
    Inflorescences axillary and/or terminal, fasciculate, spiciform or paniculate; bracts and bracteoles inconspicuous, then linear to lanceolate or the former leaf-like; flowers subsessile, in clusters or solitary.
    Calyx
    Calyx divided almost to base; lobes 5, subequal, linear-lanceolate.
    Corolla
    Corolla bilabiate, pubescent externally except towards base of tube where it is glabrous; tube narrowly long-cylindrical, usually longer than limb, roof with 2 lines of hairs within extending onto upper lip; upper lip ovate to lanceolate, apically notched or entire; lower lip divided in upper half or third into 3 subequal rounded to oblong lobes.
    Stamens
    Stamens 2; filaments attached near mouth of corolla tube, shortly exserted; anthers bithecous, thecae slightly to strongly offset, ± oblique, lower theca sometimes with a shor appendage (tail).
    Disc
    Disk shallowly cupular, with V-shaped slit.
    Ovary
    Ovary bilocular, 2 ovules per locule; style filiform; stigma bifid, lobes unequal.
    Fruits
    Capsule clavate, long-stipitate, apex shortly beaked.
    Seeds
    Seeds held on retinacula, lenticular with a hilar excavation, brown to black, ± tuberculate.
    Distribution
    A genus of c. 25 species, confined to the Old World tropics and subtropics.

    Images

    Distribution

    Native to:

    Angola, Bangladesh, Benin, Botswana, Cambodia, Cameroon, Cape Provinces, Central African Repu, China South-Central, Comoros, Congo, East Himalaya, Ethiopia, Gabon, Ghana, Guinea, Guinea-Bissau, Gulf of Guinea Is., India, Ivory Coast, Kenya, KwaZulu-Natal, Laos, Liberia, Madagascar, Malawi, Malaya, Mozambique, Myanmar, Namibia, Nigeria, Northern Provinces, Philippines, Senegal, Sierra Leone, Socotra, Somalia, Sri Lanka, Tanzania, Thailand, Togo, Uganda, Vietnam, Zambia, Zaïre, Zimbabwe

    Introduced into:

    China Southeast, Hainan, Mauritius, Réunion

    Accepted Species

    Other Data

    Rhinacanthus Nees appears in other Kew resources:

    Bibliography

    First published in N.Wallich, Pl. Asiat. Rar. 3: 76 (1832)

    Literature

    Flora of West Tropical Africa

    • —F.T.A. 5: 224.

    Flora Zambesiaca

    • —Darbyshire & Harris in Kew Bull. 61: 401–418 (2006).
    • —Nees in De Candolle, Prodr. 11: 442 (1847).
    • in Wallich, Pl. Asiat. Rar. 3: 76 (1832).

    Sources

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

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. 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 2020. 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