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  1. Family: Acanthaceae Juss.
    1. Brachystephanus Nees

      1. This genus is accepted, and its native range is Tropical Africa, Madagascar.

    [FZ]

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

    Habit
    Perennial herbs or subshrubs, sometimes monocarpic and cyclically mass-flowering (plietesial).
    Stem
    Stems (sub-)4-angular, often sulcate between angles when young.
    Leaves
    Leaves evergreen or rarely deciduous, opposite-decussate, pairs equal to anisophyllous, blade margin crenulate to subentire; lower leaves petiolate, uppermost leaves often reduced and subsessile; cystoliths numerous, ± conspicuous.
    Inflorescences
    Inflorescences terminal and sometimes also in upper leaf axils; spiciform or paniculate thyrses, cymule branching dichasial or partially monochasial, or cymules reduced to a single flower; bract pairs equal, free; bracteoles paired, as bracts or much-reduced.
    Calyx
    Calyx tubular, divided almost to base into 5 linear(-lanceolate) lobes, subequal to unequal in length.
    Corolla
    Corolla bilabiate; tube cylindric to campanulate, long to very short; upper lip either subulate or more broadly ovate to elliptic, apex acute, obtuse, apiculate or emarginate; lower lip oblong to elliptic, apex minutely to conspicuously 3-lobed, rugula absent.
    Stamens
    Stamens 2; filaments attached at or just below mouth of corolla tube, ± long-exserted, glabrous; anthers monothecous, basally muticous.
    Staminodes
    Staminodes absent.
    Disc
    Disk annular or shallowly cupuliform.
    Ovary
    Ovary oblong-ellipsoid, glabrous or largely so, bilocular, 2 ovules per locule; style filiform, ± long-exserted, glabrous; stigma either minutely clavate or conspicuously capitate, apex shallowly bilobed.
    Fruits
    Capsule stipitate, placental base inelastic.
    Seeds
    Seeds 4 per capsule, or 2 by abortion, held on retinacula, lenticular, tuberculate.
    Distribution
    A genus of 22 species distributed in tropical Africa and Madagascar.

    Images

    Distribution

    Native to:

    Angola, Burundi, Cabinda, Cameroon, Congo, Gabon, Ghana, Guinea, Gulf of Guinea Is., Ivory Coast, Kenya, Liberia, Madagascar, Malawi, Mozambique, Nigeria, Rwanda, Sudan, Tanzania, Uganda, Zambia, Zaïre, Zimbabwe

    Accepted Species

    Synonyms

    Other Data

    Brachystephanus Nees appears in other Kew resources:

    Bibliography

    First published in A.P.de Candolle, Prodr. 11: 511 (1847)

    Accepted by

    • Champluvier, D. & Darbyshire, I. (2009). A revision of the genera Brachystephanus and Oreacanthus (Acanthaceae) in tropical Africa Systematics and Geography of Plants 79: 115-192.
    • Govaerts, R. (1996). World Checklist of Seed Plants 2(1, 2): 1-492. MIM, Deurne.

    Literature

    Flora of West Tropical Africa

    • —F.T.A. 5: 177.

    Flora Zambesiaca

    • —Champluvier & Darbyshire in Syst. Geogr. Pl. 79: 115–192 (2009).
    • —Figueiredo in Kew Bull. 51: 753–763 (1996).
    • in De Candolle, Prodr. 11: 511 (1847).

    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