1. Family: Orobanchaceae Vent.
    1. Genus: Striga Lour.
      1. Striga magnibracteata Eb.Fisch. & I.Darbysh.

        This species is accepted, and its native range is SE. Guinea to SW. Mali.

    [KBu]

    Fischer, E., Darbyshire, I. & Cheek, M. Kew Bull (2011) 66: 441. https://doi.org/10.1007/s12225-011-9296-6

    Habit
    Annual herb, 30 – 55 cm tall; stems, leaves and bracts densely pubescent with curved hairs bearing a broad shield-like base and interspersed slender multicellular hairs with a minute gland-tip
    Stem
    Stems erect, quadrangular, simple or sparsely branched
    Leaves
    Leaves opposite to alternate, sessile, upper leaves 30 – 45 × 9 – 17 mm, lower leaves 30 – 35 × 8 – 15 mm, with midrib and two lateral veins
    Inflorescences
    Inflorescence a dense, quadrangular spike with imbricate and opposite to subopposite flowers; bracts large and conspicuous, lower bracts 22 – 27 × 6 – 8 mm, upper bracts 15 – 17 × 3 – 5 mm; bracteoles 8 – 9 mm long, as long or slightly longer than calyx
    Calyx
    Calyx 10-ribbed, 8 – 9 mm long; teeth linear, acute, 2 – 3 mm long
    Corolla
    Corolla white to pale pink, 13 – 14.5 mm long; tube 8 – 11 mm long, narrow, bent and expanded towards apex; upper lip shallowly bilobed, ± 2 mm long, slightly recurved; lower lip tripartite, spreading, lobes 2.5 – 3 × 1 – 1.5 mm
    Stamens
    Stamens 4, didynamous, inserted in upper tube just below throat; filaments of longer pair of stamens 1 – 1.5 mm long; anthers 0.5 – 0.65 mm long
    Ovary
    Ovary 3 – 4 mm long; style up to 6 mm long
    Fruits
    Capsule ovate, up to 4 – 5 × 3 mm, shorter than calyx.
    Distribution
    SE Guinée and SW Mali.
    Ecology
    Occurring in wooded grassland (savanna) at 390 – 890 m alt. In Guinée, it was recorded from open LophiralanceolataTiegh., HymenocardiaacidaTul. and Terminalia sp. wooded grassland with scattered tall Hyparrhenia, and in more denseHyparrhenia thickets. In Mali, it was recorded from IsoberliniadokaCraib & Stapf, ParinaricuratellifoliaBenth., Daniellia sp., Lophiralanceolata, Gardenia ternifolia Schum. & Thonn. and Afrormosia sp. wooded grassland with AndropogongayanusKunth. These habitats are rather typical of the “Guinean savanna” which extends in a belt all the way from Senegal in the west to Sudan and NW Uganda in the east. It is unusual, though not unique, to find such a localised species within this habitat. An investigation of the specific ecological requirements of Striga magnibracteata, including host specifity, may help to shed light upon why this species is so restricted.
    Conservation
    Striga magnibracteata is here assessed as Endangered (EN B2a,b(iii)) using the criteria of IUCN (2001) since it is only known from three sites with an area of occupancy of 12 km² (using 4 km² grid cells). No threats are known to the site in Mali, but the two sites in Guinée fall along the northern part of the Simandou range, the site of a planned open cast iron-ore mine for Beny Steinmetz Group Resources (BSGR) (http://www.mineweb.co.za/mineweb/view/mineweb/en/page72068?oid=86677&sn=Detail accessed 17 August 2009). While neither of the localities concerned are on the deposit itself, they would be at risk from infrastructure associated with the mine, such as access roads and waste dumps. It is possible that Striga magnibracteata is more common than the initial data suggests; it is to be hoped that future survey work will uncover further, unthreatened sites for this species.

    Distribution

    Native to:

    Guinea, Mali

    Striga magnibracteata Eb.Fisch. & I.Darbysh. appears in other Kew resources:

    First published in Kew Bull. 66: 443 (2011 publ. 2012)

    Literature

    Kew Bulletin
    • Bremer, B., Bremer, K., Chase, M. W., Fay, M. F., Reveal, J. L., Soltis, D. E., Soltis, P. S., Stevens, P. F., Anderberg, A. A., Moore, M. J., Olmstead, R. G., Rudall, P. J., Sytsma, K. J., Tank, D. C., Wurdack, K., Xiang, J. Q. Y. & Zmarzty, S. (2009). An update on the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III. Bot. J. Linn. Soc. 161: 105 – 121.CrossRefGoogle Scholar
    • Lisowski, S. (2009). Flore (Angiospermes) de la Republique de Guinee. Premiere partie (texte). Scripta Bot. Belg. 41.Google Scholar
    • Ghazanfar, S. A., Hepper, F. N. & Philcox, D. (2008). Scrophulariaceae. In: H. J. Beentje & S. A. Ghazanfar (eds), Flora of Tropical East Africa. Royal Botanic Gardens, Kew.Google Scholar
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    • IUCN (2001). IUCN Red List Categories and Criteria. Version 3.1. IUCN Species Survival Commission, IUCN, Gland, Switzerland and Cambridge, UK.Google Scholar
    • Mohamed, K. I., Musselman, L. J. & Riches, C. R. (2001). The genus Striga (Scrophulariaceae) in Africa. Ann. Missouri Bot. Gard. 88: 60 – 103.CrossRefGoogle Scholar
    • Neumann, U., Paré, J., Raynal-Roques, A., Sallé, G. & Weber, H. (1996). Characteristic trichomes observed in some African parasitic Scrophulariaceae. In: M. T. Moreno & J. I. Cubero (eds), Advances in Parasitic Plant Research: 264 – 272. Junta de Andalucía, Córdoba.Google Scholar
    • Raynal-Roques, A. (1987). The genus Striga (Scrophulariaceae) in western and central Africa — a survey. In: H. C. Weber & W. Forstreuter (eds), Proceedings of the Fourth International Symposium on Parasitic Flowering Plants: 675 – 689. ISPPEP, Marburg.Google Scholar

    Sources

    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 Bulletin
    Kew Bulletin
    http://creativecommons.org/licenses/by-nc-sa/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