1. Family: Poaceae Barnhart
    1. Genus: Panicum L.
      1. Panicum pusillum Hook.f.

        This species is accepted, and its native range is Tropical Africa.

    [FWTA]

    Gramineae, W. D. Clayton. Flora of West Tropical Africa 3:2. 1972

    Habit
    A weak prostrate annual growing in loose mats
    Ecology
    Wet flushes on rock and ironstone outcrops.
    [FZ]

    Gramineae, W. D. Clayton. Flora Zambesiaca 10:3. 1989

    Habit
    Delicate annual; culms 3–20(60) cm. long, slender, erect or more often decumbent.
    Leaf lamina
    Leaf laminae 1–4 cm. long and 1.5–6 mm. wide, lanceolate, flat, pilose, acute or acuminate, cross veins absent.
    Inflorescences
    Panicle 1–2(5) cm. long, ovate, sparsely to moderately branched, the branches spreading to deflexed at maturity.
    Spikelets
    Spikelets 1.5–2 mm. long, narrowly ovate, pilose; inferior glume 2/3–3/4 the length of the spikelet, 3-nerved, acuminate; superior glume 5–7-nerved; inferior lemma 5-nerved; its palea poorly developed, sterile; superior lemma and palea pallid, glossy.
    [GB]
    Habit
    Annual. Culms decumbent; weak; (1.5-)5-40 cm long; rooting from lower nodes. Ligule a ciliate membrane. Leaf-blades lanceolate; tapering towards sheath, or parallel-sided; 0.6-4(-4.5) cm long; 1.5-6 mm wide; membranous. Leaf-blade venation without cross veins. Leaf-blade surface pilose. Leaf-blade apex acute, or acuminate.
    Inflorescences
    Inflorescence a panicle. Panicle open; ovate; 1-2(-5) cm long. Primary panicle branches spreading, or reflexed. Panicle branches pilose. Spikelets solitary. Fertile spikelets pedicelled.
    Spikelets
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; acute; 1.5-2 mm long; falling entire.
    Fertile
    Spikelets comprising 1 basal sterile florets; 1 fertile florets; without rhachilla extension. Spikelets ovate; dorsally compressed; acute; 1.5-2 mm long; falling entire.
    Glume
    Glumes similar; reaching apex of florets; thinner than fertile lemma. Lower glume ovate; 0.5-0.66 length of spikelet; membranous; without keels; 3 -veined. Lower glume surface glabrous, or pilose; with tubercle-based hairs. Lower glume apex acute. Upper glume ovate; 1 length of spikelet; membranous; without keels; 5-7 -veined. Upper glume surface glabrous, or pilose; with tubercle-based hairs. Upper glume apex acute.
    Florets
    Basal sterile florets barren; without significant palea. Lemma of lower sterile floret similar to upper glume; ovate; 1 length of spikelet; membranous; 5 -veined; glabrous, or pilose; with tubercle-based hairs; acute. Fertile lemma oblong; dorsally compressed; 1.5-2 mm long; indurate; pallid; shiny; without keel. Lemma margins involute. Lemma apex obtuse. Palea involute; indurate.
    Distribution
    Africa: west tropical, west-central tropical, northeast tropical, east tropical, and southern tropical.
    Reference
    Paniceae. FTEA.
    [FTEA]

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

    Habit
    Annual; culms (1.5–)5–40 cm. high, delicate, erect or decumbent and often rooting at the lower nodes, rarely erect.
    Leaves
    Leaf-blades lanceolate, 0.6–4(–4.5) cm. long, 1.5–6 mm. wide, straight or abruptly narrowed at the base, flat, cross-veins absent, membranous, pilose, acute or acuminate.
    Inflorescences
    Panicle ovate, 1–2(–5) cm. long, pilose, usually very sparsely branched, the branches and pedicels spreading to deflexed.
    Spikelets
    Spikelets readily disarticulating, narrowly ovate, 1.5–2 mm. long, pilose with tubercle-based hairs or glabrous, acute; lower glume narrowly ovate; 1/2–3/4 the length of the spikelet, 3-nerved, acuminate; upper glume ovate, 5–7-nerved, acute; lower lemma 5-nerved, sterile, its palea poorly developed; upper lemma shining, usually with a conspicuous crescentic callus.
    Habitat
    Mountain grassland or bushland and forest margins, on various soils; 1350–3300 m.
    Distribution
    K3 K4 K5 T2 T3 T7 T8 U2 U3 Sierra Leone to Ethiopia, and in Malawi

    Images

    Distribution

    Native to:

    Burundi, Cameroon, Congo, Ethiopia, Gabon, Kenya, Malawi, Nigeria, Rwanda, Sierra Leone, Sudan, Tanzania, Uganda, Zaïre

    Panicum pusillum Hook.f. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Jun 1, 2001 Pollard, B.J. [150], Cameroon K000107908
    Hepper, F.N. [2142], Cameroon K000182417
    Schimper [1095], Ethiopia K000255571 isotype
    Hedberg, O. [93104], Cameroon K000087441
    Mann G. [2090], Cameroon K000182419 Unknown type material
    Migeod F. [161A], Cameroon K000182420 Unknown type material

    First published in J. Proc. Linn. Soc., Bot. 7: 227 (1864)

    Accepted by

    • Darbyshire, I., Kordofani, M., Farag, I., Candiga, R. & Pickering, H. (eds.) (2015). The Plants of Sudan and South Sudan: 1-400. Kew publishing, Royal Botanic Gardens, Kew.
    • Onana, J.M. (2011). The vascular plants of Cameroon a taxonomic checklist with IUCN assessments: 1-195. National herbarium of Cameroon, Yaoundé.
    • Sosef, M.S.M. & al. (2006). Check-list des plantes vasculaires du Gabon Scripta Botanica Belgica 35: 1-438.
    • Clayton, W.D., Harman, K.T. & Williamson, H. (2006). World Grass Species - Synonymy database The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Hedberg, I. & Edwards, S. (eds.) (1995). Flora of Ethiopia and Eritrea 7: 1-430. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.
    • Clayton, W.D. (1989). Flora Zambesiaca 10(3): 1-231. Royal Botanic Gardens, Kew.
    • Ndabaneze, P. (1989). Catalogue des Graminées du Burundi Lejeunia; Revue de Botanique, n.s., 132: 1-127.
    • Troupin, G. (ed.) (1988). Flora du Rwanda 4: I-X, 1-651. Musee Royal de l'Afrique Centrale.
    • Clayton, W.D. & Renvoize, S.A. (1982). Gramineae Flora of Tropical East Africa 3: 451-898.
    • Hepper, F.N. (ed.) (1972). Flora of West Tropical Africa, ed. 2, 3(2): 277-574.
    • Lewalle, J. (1970). Liste floristique et répartition altitudinale de la flore du Burundi occidental: 1-84. Université officielle de Bujumbura.

    Literature

    Flora of West Tropical Africa
    • F.T.A. 9: 275.
    • in J. Linn. Soc. Bot. 7: 227 (1864)
    Kew Backbone Distributions
    • Darbyshire, I., Kordofani, M., Farag, I., Candiga, R. & Pickering, H. (eds.) (2015). The Plants of Sudan and South Sudan: 1-400. Kew publishing, Royal Botanic Gardens, Kew.
    • Sosef, M.S.M. & al. (2006). Check-list des plantes vasculaires du Gabon Scripta Botanica Belgica 35: 1-438.
    • Hedberg, I. & Edwards, S. (eds.) (1995). Flora of Ethiopia and Eritrea 7: 1-430. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.
    • Troupin, G. (ed.) (1988). Flora du Rwanda 4: I-X, 1-651. Musee Royal de l'Afrique Centrale.
    • Clayton, W.D. & Renvoize, S.A. (1982). Gramineae Flora of Tropical East Africa 3: 451-898.
    • Hepper, F.N. (ed.) (1972). Flora of West Tropical Africa, ed. 2, 3(2): 277-574.
    • Lewalle, J. (1970). Liste floristique et répartition altitudinale de la flore du Burundi occidental: 1-84. Université officielle de Bujumbura.
    • Robyns, W. (1934). Flore Agrostologique du Congo Belge et du Ruanda-Urundi 2: 9-386. Goemaere, Bruxelles.
    Flora of Tropical East Africa
    • Clayton in Flora of West Tropical Africa, ed. 2, 3: 433 (1972).
    • D.M. Napper, Grasses of Tanganyika: 60 (1965).
    • K.W. Harker & D.M. Napper, An Illustrated Guide to the Grasses of Uganda p. 44 (1960).
    • A.V. Bogdan, A Revised List of Kenya Grasses p. 38 (1958).
    • F. W. Andr., The Flowering Plants of the Sudan 3: 505 (1956).
    • Robyns, Flore des Spermatophytes du Parc National Albert 3: 109 (1955).
    • Robyns, Fl. Agrost. Congo Belge 2: 216 (1934).
    • Stapf in Flora of Tropical Africa 9: 725 (1920).
    • Hook. f. in Journal of the Linnean Society of London, Botany 7: 227 (1864).

    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

    Flora of West Tropical Africa
    Flora of West Tropical 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 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