1. Family: Santalaceae R.Br.
    1. Genus: Thesium L.
      1. Thesium wilczekianum Lawalrée

        This species is accepted, and its native range is S. DR Congo to W. Zambia.

    [FZ]

    Flora Zambesiaca. Vol. 9, Part 3. Polygonaceae-Myriaceae. Pope GV, Polhill RM, Martins ES. 2006.

    Type
    Type from Dem. Rep. Congo (Potopoto, Katanga (Shaba) Province).
    Style
    Style 2.3–3 mm long; stigma reaching top of anthers
    Ecology
    “Boggy grassland” and “in dark soil on ancient ant tumps”; 1200 m. The type material came from “prairie tourbeuse”; 1450 m.
    Note
    The specimens from Sinkabolo Dambo (three different collections) and another collected between Mwinilunga and Kalene Hill, differ from the typical plant in having smaller external glands (0.3 mm versus 0.5–0.7 mm) and the flowers are mostly subtended by a small involucre (not a bract and two bracteoles), but the material agrees so well in facies that these differences seem insignificant. The species can be recognized among its close allies by the small tufts of slender simple to sparingly virgately branched stems, long lax inflorescences that look like spikes until closely examined, perianth lobes with small hood and densely fringed margins, and conspicuous tooth-like glands.
    Distribution
    ZAM W Zambia Also in Katanga (Shaba) Province of Dem. Rep. Congo.
    Habit
    Perennial herb with a small woody caudex; stems c. 4–7 from crown, c. 450–700 mm tall, 1–2.5 mm diameter at base, sometimes simple, usually laxly branched above, branches sharply ascending, strongly ribbed by raised vascular strands terminating in midribs of scale leaves, distantly leafy. Perennial herb with a small woody caudex; stems c. 4–7 from crown, c. 450–700 mm tall, 1–2.5 mm diameter at base, sometimes simple, usually laxly branched above, branches sharply ascending, strongly ribbed by raised vascular strands terminating in midribs of scale leaves, distantly leafy
    Leaves
    Leaves all reduced to scales, c. 1.5–2 × 1–1.2 mm, increasing in size upwards and passing into floral bracts, lanceolate, acuminate, closely appressed, midrib strongly raised on dorsal surface. Leaves all reduced to scales, c. 1.5–2 × 1–1.2 mm, increasing in size upwards and passing into floral bracts, lanceolate, acuminate, closely appressed, midrib strongly raised on dorsal surface
    Flowers
    Flowers in long lax spikes of either apparently solitary flowers (buds sometimes hidden in bract axils) or very short densely crowded brachyblasts carrying 3–6 flowers. Flowers in long lax spikes of either apparently solitary flowers (buds sometimes hidden in bract axils) or very short densely crowded brachyblasts carrying 3–6 flowers
    Bracts
    Bracts and bracteoles c. 2.5–3 × 1–1.5 mm, ovate-acuminate, margins membranous, minutely erose-ciliate, outermost keeled by strongly raised midrib, sometimes 3 only (as in type), often 4–6 forming an involucre below each flower. Bracts and bracteoles c. 2.5–3 × 1–1.5 mm, ovate-acuminate, margins membranous, minutely erose-ciliate, outermost keeled by strongly raised midrib, sometimes 3 only (as in type), often 4–6 forming an involucre below each flower
    Pedicel
    Pedicels wanting. Pedicels wanting
    Perianth
    Perianth creamy-coloured inside, brownish-orange outside, tube 0.8–1 mm long, 5 very conspicuous white tooth-like glands 0.3–0.7 mm long alternating with the lobes; lobes 2.1–2.6 × 0.5–0.6 mm, linear-lanceolate, subacute, hood c. 0.4 mm long, margins inflexed, densely white-fimbriate. Perianth creamy-coloured inside, brownish-orange outside, tube 0.8–1 mm long, 5 very conspicuous white tooth-like glands 0.3–0.7 mm long alternating with the lobes; lobes 2.1–2.6 × 0.5–0.6 mm, linear-lanceolate, subacute, hood c. 0.4 mm long, margins inflexed, densely white-fimbriate
    Stamens
    Stamens inserted at base of perianth lobes; filaments conspicuous, 1.3–1.8 mm long, very briefly adnate to lobe; anthers 0.5–0.7 mm long. Stamens inserted at base of perianth lobes; filaments conspicuous, 1.3–1.8 mm long, very briefly adnate to lobe; anthers 0.5–0.7 mm long
    Pistil
    Style 2.3–3 mm long; stigma reaching top of anthers.
    Fruits
    Fruit 2–2.5 × 2–2.1 mm (slightly immature?), red-brown, very strongly ribbed, very weakly reticulate. Fruit 2–2.5 × 2–2.1 mm (slightly immature?), red-brown, very strongly ribbed, very weakly reticulate.

    Distribution

    Native to:

    Zambia, Zaïre

    Thesium wilczekianum Lawalrée appears in other Kew resources:

    First published in Bull. Jard. Bot. Natl. Belg. 55: 24 (1985)

    Accepted by

    • Pope, G.V., Polhill, R.M. & Martins, E.S. (eds.) (2006). Flora Zambesiaca 9(3): 1-277. Royal Botanic Gardens, Kew.

    Literature

    Flora Zambesiaca
    • Bull. Jard. Bot. Belg. 55: 24 (1985). TAB. 46, fig. G.
    Kew Backbone Distributions
    • Pope, G.V., Polhill, R.M. & Martins, E.S. (eds.) (2006). Flora Zambesiaca 9(3): 1-277. Royal Botanic Gardens, Kew.

    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 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 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