1. Family: Poaceae Barnhart
    1. Genus: Perotis Aiton
      1. Perotis vaginata Hack.

        This species is accepted, and its native range is Tanzania to Namibia.

    [FTEA]

    Gramineae, W. D. Clayton, S. M. Phillips & S. A. Renvoize. Flora of Tropical East Africa. 1974

    Habit
    Loosely tufted annual; culms 12–40 cm. high, geniculately ascending, robust.
    Leaves
    Leaf-blades lanceolate, 1–4 cm. long, 1.5–6 mm. wide.
    Inflorescences
    Spike 3–15 cm. long, embraced below by the uppermost leaf-sheath, the spikelets densely packed and ascending.
    Spikelets
    Spikelets 4–5.5 mm. long, with a slender stipitiform callus 0.7–1.5 mm. long; glumes irregularly appressed scaberulous to glabrescent, the midnerve of the upper glume broad, not depressed, ± scabrid; awns 13–25 mm. long, stiff.
    Fruits
    Caryopsis flattened.
    Habitat
    Roadsides, disturbed soils and overgrazed places; 700–1600 m.
    Distribution
    T1 T4 Zaire to SW. Africa
    [GB]
    Habit
    Annual; caespitose. Culms decumbent; 12-40 cm long. Ligule an eciliate membrane. Leaf-blades lanceolate; 1-4 cm long; 1.5-6 mm wide.
    Inflorescences
    Inflorescence composed of racemes; embraced at base by subtending leaf. Racemes 1; single; multilateral; 3-15 cm long. Spikelet packing crowded; irregular. Spikelets ascending; solitary. Fertile spikelets pedicelled. Pedicels oblong; 0.1-0.2 mm long.
    Spikelets
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear, or lanceolate; subterete; 4.7-7 mm long; falling entire. Spikelet callus linear; 0.7-1.5 mm long.
    Fertile
    Spikelets comprising 1 fertile florets; without rhachilla extension. Spikelets linear, or lanceolate; subterete; 4.7-7 mm long; falling entire. Spikelet callus linear; 0.7-1.5 mm long.
    Glume
    Glumes similar; exceeding apex of florets; firmer than fertile lemma. Lower glume lanceolate; 4-5.5 mm long; 1 length of upper glume; membranous; without keels; 1 -veined. Lower glume lateral veins absent. Lower glume surface glabrous, or hispidulous. Lower glume apex acuminate; awned; 1 -awned. Lower glume awn 13-25 mm long. Upper glume lanceolate; 4-5.5 mm long; 2-3 length of adjacent fertile lemma; membranous; without keels; 1 -veined. Upper glume primary vein conspicuous; scabrous. Upper glume lateral veins absent. Upper glume surface glabrous, or hispidulous. Upper glume apex acuminate; awned; 1 -awned. Upper glume awn 13-25 mm long.
    Florets
    Fertile lemma lanceolate; 2-2.5 mm long; hyaline; without keel; 1 -veined. Lemma apex acute. Palea hyaline.
    Flowers
    Anthers 3.
    Fruits
    Caryopsis with adherent pericarp; fusiform; dorsally compressed.
    Distribution
    Africa: west-central tropical, east tropical, southern tropical, and south.
    Reference
    Cynodonteae. FTEA.
    [FZ]

    Gramineae, T. Cope. Flora Zambesiaca 10:2. 1999

    Habit
    Annual up to 50(65) cm tall, geniculately ascending; leaf laminas 1–4 cm × 1.5–6 mm, lanceolate.
    Inflorescences
    Inflorescence 4–11(15) cm long, embraced below by the uppermost leaf sheath, the spikelets densely packed and ascending.
    Spikelets
    Spikelets 4–5.5 mm long with a slender stipitiform callus 0.7–1.5 mm long; glumes irregularly appressed-scaberulous to pubescent, with a slender rather stiff awn, those of the 2 glumes similar, 15–25 mm long.
    Fruits
    Caryopsis flattened.

    Images

    Distribution

    Native to:

    Angola, Botswana, Burundi, Caprivi Strip, Namibia, Tanzania, Zambia, Zaïre, Zimbabwe

    Perotis vaginata Hack. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Sep 10, 1947 Gossweiler, J. [3714], Angola K000280843
    Bidgood, S. [5536], Tanzania K000468888

    First published in Bull. Herb. Boissier, sér. 2, 6: 704 (1906)

    Accepted by

    • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Germishuizen, G. & Meyer, N.L. (eds.) (2003). Plants of Southern Africa: an annotated checklist. Strelitzia 14.: i-vi, 1-1231. National Botanical Institute, Pretoria.
    • Cope, T. (1999). Flora Zambesiaca 10(2): 1-261. Royal Botanic Gardens, Kew.
    • Ndabaneze, P. (1989). Catalogue des Graminées du Burundi Lejeunia; Revue de Botanique, n.s., 132: 1-127.
    • Lewalle, J. (1970). Liste floristique et répartition altitudinale de la flore du Burundi occidental: 1-84. Université officielle de Bujumbura.

    Literature

    Kew Backbone Distributions
    • Figueiredo, E. & Smith, G.F. (2008). Plants of Angola Strelitzia 22: 1-279. National Botanical Institute, Pretoria.
    • Cope, T. (1999). Flora Zambesiaca 10(2): 1-261. Royal Botanic Gardens, Kew.
    • Lewalle, J. (1970). Liste floristique et répartition altitudinale de la flore du Burundi occidental: 1-84. Université officielle de Bujumbura.
    Flora of Tropical East Africa
    • D.M. Napper, Grasses of Tanganyika: 20 (1965).
    • Hack. in Bull. Herb. Boiss., sér. 2, 6: 704 (1906).

    Sources

    Flora Zambesiaca
    Flora Zambesiaca
    http://creativecommons.org/licenses/by-nc-sa/3.0

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

    GrassBase - The Online World Grass Flora
    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