Skip to main content
  1. Family: Acanthaceae Juss.
    1. Genus: Pseudocalyx Radlk.
      1. Pseudocalyx saccatus Radlk.

        This species is accepted, and its native range is S. Tanzania to S. Tropical Africa, Madagascar.

    [FTEA]

    Acanthaceae (part 1), Kaj Vollesen, Flora of Tropical East Africa, 2008

    Habit
    Strong scandent shrub or woody twiner to 15 m or more; young stems terete or quadrangular, densely yellowish to reddish stellate-pubescent, glabrescent.
    Petiole
    Petiole 0.5–2 cm long, stellate-pubescent; lamina elliptic to obovate, largest 7.5–13 × 4–9 cm, apex acute to acuminate or obtuse with a mucronate tip, base cuneate to subcordate, margin entire to crenate-dentate, above subglabrous to stellate-pubescent, densest along midrib, glabrescent, below similar or denser.
    Flowers
    Flowers solitary or in 2–3-flowered axillary fascicles, often merging towards apex into pseudo-racemes up to 15(–20) cm long with leafy bracts gradually decreasing in size upwards; flowers erect in bud, pendulous when open and becoming erect in fruit; pedicels 0.5–2.7 cm long, densely yellowish to reddish stellate-pubescent, some hairs with a stalk up to 1 mm long and a “crown” of hairs; bracteoles broadly ovate, 1.3–1.8 × 1.1–1.7 cm, broadly rounded, densely orange to reddish stellate-pubescent outside, glabrous or with scattered stellate hairs inside.
    Calyx
    Calyx an undulate rim, ± 2 mm high, densely yellowish stellate-pubescent.
    Corolla
    Corolla pink to reddish purple, paler on the inside, covered with a dense floccose-stellate yellowish indumentum which rubs off easily; tube 1.4–2 cm long, widening slightly upwards; lobes 5–7 × 4–8 mm, broadly ovate-reniform.
    Anthers
    Anthers 7–8 mm long, with bulbous-based hairs and sessile glands along their whole length.
    Disc
    Disc slightly lobed, ± 1 mm high.
    Ovary
    Ovary ± 5 mm long, densely yellowish stellate-pubescent; style ± 1.5 cm long, glabrous; stigma with 2 equal lobes ± 1 mm long.
    Fruits
    Capsule broadly triangular in outline, acute, a beak not defined, 2.5–3 × 1.5–2 cm, when young densely floccose-stellate, glabrescent.
    Seeds
    Seed dark grey to blackish, finely hairy with simple hairs when young, 6–8 mm in diameter.
    Figures
    Fig. 5.
    Distribution
    Range: Madagascar Range: Tanzania. Range: Congo-Kinshasa, Mozambique, Angola, Zambia, Zimbabwe; Madagascar Flora districts: T8
    Ecology
    Semideciduous lowland forest; 500–800 m
    Note
    Gillett (l.c.) records that the fibrous bark is used for rope making.

    Images

    Distribution

    Native to:

    Angola, Madagascar, Mozambique, Tanzania, Zambia, Zaïre, Zimbabwe

    Synonyms

    Other Data

    Pseudocalyx saccatus Radlk. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Feb 1, 2014 Hanitrarivo, R.M. et al. [HMR 369], Madagascar K000662512
    Jan 1, 1999 Swynnerton, C.F.M. [97], Zimbabwe K000393691 isotype
    Jan 1, 1999 Swynnerton, C.F.M. [97], Zimbabwe K000393692 isotype
    Du Puy, B. [s.n.], Madagascar K001295747
    Baron, R. [s.n.], Madagascar K000393688 Unknown type material
    Baron, R. [5864], Madagascar K000393689 Unknown type material
    Baron, R. [4915], Madagascar K000393690 Unknown type material

    Bibliography

    First published in Abh. Naturwiss. Vereine Bremen 8: 416 (1883)

    Accepted by

    • Vollesen, K. (2013). Flora Zambesiaca 8(5): 1-184. Royal Botanic Gardens, Kew.
    • Lejoy, J., Ndjele, M.-B. & Geerinck, D. (2010). Catalogue-flore des plantes vasculaires des districts de Kisangani et de la Tshopo (RD Congo) Taxonomania 30: 1-307.
    • Vollesen, K. (2008). Flora of Tropical East Africa, Acanthaceae(1): 1-285.

    Literature

    Kew Backbone Distributions

    • Vollesen, K. (2013). Flora Zambesiaca 8(5): 1-184. Royal Botanic Gardens, Kew.
    • Lejoy, J., Ndjele, M.-B. & Geerinck, D. (2010). Catalogue-flore des plantes vasculaires des districts de Kisangani et de la Tshopo (RD Congo) Taxonomania 30: 1-307.

    Flora of Tropical East Africa

    • Adansonia, ser. 3, 20: 277 (1998).
    • Lebrun & Stork, Enum. Pl. Afr. Trop. 4: 500 (1997)
    • K.B. 49: 812 (1994)
    • Fl. Madagascar 182, 1: 20 (1967)
    • Notul. Syst. 11: 149 (1944)
    • Bull. Mus. Hist. Nat. Paris 32: 150 (1926)
    • E. & P. Pf. IV, 3b: 293 (1895)
    • Baillon, Hist. Pl. 10: 423 (1890)
    • Bremen 8: 417 (1883)

    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.
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/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