1. Family: Lamiaceae Martinov
    1. Tetradenia Benth.

      1. This genus is accepted, and its native range is Eritrea to S. Africa, Madagascar.

    [FTEA]

    Lamiaceae (Labiatae), A.J. Paton, G. Bramley, O. Ryding, R.M. Polhill, Y.B. Harvey, M. Iwarsson, F. Willis, P.B. Phillipson, K. Balkwill, C.W. Lukhoba, D.F. Otieno, & R.M. Harley. Flora of Tropical East Africa. 2009

    Habit
    Aromatic dioecious shrubs
    Stem
    Stems thick and usually fleshy when young, bearing 4 distinctive callosities at each node
    Leaves
    Leaves petiolate, dentate, deciduous; midrib and major veins fleshy, prominent on lower surface
    Inflorescences
    Inflorescence a large panicle-like thyrse, often produced on leafless plants during the dry season, the branches bearing numerous spikes composed of many sessile usually 3-flowered cymes of tiny flowers; lowermost bracts leaf-like; verticil bracts small, persistent or caducous, green
    Calyx
    Calyx tubular, 2-lipped, 5-lobed; posterior lobe usually rounded, not decurrent, lateral and anterior lobes smaller, subequal, acute, separated by a deep basal sinus giving the appearance of two emarginate lateral lobes; fruiting calyx slightly enlarged; lateral and anterior lobes closed around nutlets; posterior lobe usually held open
    Corolla
    Corolla white or pale pink to violet, trumpet to funnel-shaped, weakly 2-lipped; posterior lip 2-lobed, ascending; lateral lobes spreading; anterior lip formed by a single longer horizontal or deflexed lobe; corolla tube ± straight, villous within
    Stamens
    Stamens 4, subequal, exserted, attached in the throat; filaments straight, glabrous; anthers synthecous, rounded; staminodes present in female flowers, often minute
    Disc
    Disk 4-lobed, fleshy
    Ovary
    Ovary glabrous, deeply 4-lobed; style gynobasic, filiform, glabrous, exserted, bifid at apex; a rudimentary gynoecium with a reduced bifid style present in male flowers
    Fruits
    Nutlets ovoid to oblong, brown, not mucilaginous when wetted.
    Note
    The identity of the East African species has been greatly confused in the past - Brenan in T.T.C.L.: 256 (1949) recognised three species (which he placed in the genus Iboza), more recently, these and other species from other regions have been placed as synonyms of T. riparia (Hochst.) Codd (Codd, 1983 and K.T.S.L.: 635, 1994). We take a narrower view of species circumscription in the genus, limiting T. riparia to populations from southern Africa (South Africa to Malawi), resuscitating some of the synonyms and describing two new species from the Flora area (Phillipson & Steyn, 2008). T. riparia is also cultivated as a garden ornamental, including within the Flora area: Kenya, Kiambu District, Muguga, Cult. Hort. 26 Aug. 1961, Greenway 10203!; Tanzania, Lushoto, Jaegerstal, 21 Apr. 1971, Mshana 161! & Lushoto Boma Garden, 11 July 1978, Ruffo 1362! It is most similar to T. galpinii in the Flora area, the differences are given under that species.

    Images

    Distribution

    Native to:

    Angola, Botswana, Burundi, Cape Provinces, Ethiopia, Kenya, KwaZulu-Natal, Madagascar, Malawi, Mozambique, Namibia, Northern Provinces, Rwanda, Sudan, Swaziland, Tanzania, Uganda, Zambia, Zaïre, Zimbabwe

    Tetradenia Benth. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Dupuy, D.J. [M 914], Madagascar 63564.000

    First published in Edwards's Bot. Reg. 15: t. 1300 (1830)

    Accepted by

    • Govaerts, R. (2003). World Checklist of Selected Plant Families Database in ACCESS: 1-216203. The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Flora of Tropical East Africa
    • Adansonia sér. 3, 30: 177–196 (2008)
    • Molec. Phylog. Evol. 31: 277–299 (2004)
    • Kubitzki, Fam. Gen. Vasc. Pl. 7: 265 (2004)
    • Fl. Madag. 175: 70–71 (1998)
    • Bothalia 14: 177–183 (1983)
    • Lab. Gen. Sp.: 164 (1833)
    • Bot. Reg., sub t. 1300 (1830)

    Sources

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

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2018. 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 2018. 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