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  1. Family: Linaceae DC. ex Perleb
    1. Genus: Linum L.
      1. Linum volkensii Engl.

        This species is accepted, and its native range is Cameroon, Ethiopia to S. Tropical Africa.

    [FTEA]

    Linaceae, Doreen L. Smith. Flora of Tropical East Africa. 1966

    Habit
    Erect herb up to 90 cm. high, annual or perennial, often woody at the base, glabrous in all parts.
    Stem
    Stems terete, obscurely longitudinally ridged.
    Leaves
    Leaves all alternate, linear-lanceolate to linear, 5–25 mm. long, 1–3 mm. wide, apiculate or sharply acuminate, margin scabrid-setulose, rarely entire.
    Stipules
    Stipules globose, small, dark brown, persistent.
    Inflorescences
    Inflorescence a many-flowered, lax or compact, monochasial, paniculate or corymbose cyme; pedicels 1–11 mm. long; bracts linear.
    Calyx
    Sepals 5, ovate or elliptic-ovate, long-acuminate, with glandular-serrulate margin; midrib prominent only in basal half to two-thirds of sepal.
    Corolla
    Petals 5, obovate, rounded or bluntly apiculate, yellow or orange-yellow, often fading white before falling, also occasionally purple-veined.
    Stamens
    Stamens 5.
    Pistil
    Styles 5; stigmas capitate.
    Fruits
    Capsule globose, 2–3 mm. in diameter, equalling or shorter than the persistent calyx, straw-coloured.
    Seeds
    Seeds flattened, ± 1 mm. long, shining, light brown.
    Figures
    Fig. 3.
    Habitat
    Upland grassland, in marshes and by streams; 1300-2750 m.
    Distribution
    K1 K2 K3 K4 K5 K6 T2 T3 T4 T7 T8 U1 U2 U3
    [FZ]

    Linaceae, N. K. B. Robson. Flora Zambesiaca 2:1. 1963

    Habit
    Herb (10) 20–75 (90) cm. high, erect or somewhat spreading, perennial or annual, glabrous (or rarely glabrescent?).
    Stem
    Stems single and branched or grouped and unbranched for most of their length, ridged above, becoming terete towards the base.
    Leaves
    Leaves alternate throughout; lamina (5) 10–25 × 1–3 mm., uniformly linear-lanceolate, sharply acuminate to apiculate at the apex, with margin denticulate or shortly ciliate (rarely entire) sometimes involute, 1 (rarely 3)-nerved; stipular glands globular or ellipsoid, dark brown, persistent.
    Inflorescences
    Inflorescence a lax or ± dense monochasial paniculate to corymbose cyme, usually many-flowered; bracts linear to narrowly triangular, with the margin usually ± glandular; pedicels 1–1·5 (2) mm. long, not elongating in fruit.
    Flowers
    Flowers homostylic.
    Calyx
    Sepals 2–3 mm. long, ovate-elliptic, sharply acuminate to caudate at the apex, with the margin gland-fringed and the midrib not extending beyond the midpoint (or rarely reaching the apex, when the lower third is more prominent than the rest).
    Corolla
    Petals dull yellow, sometimes with reddish veins, 5– mm. long, obovate, rounded at the apex.
    Stamens
    Stamens 2·5–3·5 mm. long, with filaments united in the lower quarter; anthers c. 0·75 mm. long, oblong-ovate; staminodial processes very short.
    Pistil
    Ovary c. 1 mm. long, globose; styles c. 2–3 times as long as the ovary, exceeding the stamens, free, linear; stigmas capitate-globose.
    Fruits
    Capsule about as long as the sepals, globose, yellow-brown, sometimes purplish towards the apex.
    Seeds
    Seeds c. 1 mm. long, oblong-ellipsoid, plano-convex, reddish-brown, smooth, shining.

    Images

    Distribution

    Native to:

    Burundi, Cameroon, Ethiopia, Kenya, Malawi, Mozambique, Rwanda, Somalia, Tanzania, Uganda, Yemen, Zaïre

    Synonyms

    Other Data

    Linum volkensii Engl. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Oct 1, 2003 Cheek, M. [9426], Cameroon K000197652
    Jan 1, 1964 Volkens, G. [369], Tanzania Linum holstii K000425990
    Milne-Redhead, E., Tanzania Linum holstii 8887.000
    Holst, C. [8988], Tanzania Linum holstii K000425991 holotype

    Bibliography

    First published in Pflanzenw. Ost-Afrikas, C: 226 (1895)

    Accepted by

    • Onana, J.M. (2011). The vascular plants of Cameroon a taxonomic checklist with IUCN assessments: 1-195. National herbarium of Cameroon, Yaoundé.
    • Edwards, S., Tadesse, M., Demissew, S. & Hedberg, I. (eds.) (2000). Flora of Ethiopia and Eritrea 2(1): 1-532. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.
    • Wood, J.R.I. (1997). A handbook of the Yemen Flora: 1-434. Royal Botanic Gardens, Kew.
    • Thulin, M. (ed.) (1993). Flora of Somalia 1: 1-493. The Royal Botanic Gardens, Kew.
    • Troupin, G. (ed.) (1983). Flora du Rwanda 2: 1-603. Musee Royal de l'Afrique Centrale.
    • Lewalle, J. (1970). Liste floristique et répartition altitudinale de la flore du Burundi occidental: 1-84. Université officielle de Bujumbura.
    • Smith, D.L. (1966). Flora of Tropical East Africa, Linaceae: 1-11.

    Literature

    Kew Backbone Distributions

    • Onana, J.M. (2011). The vascular plants of Cameroon a taxonomic checklist with IUCN assessments: 1-195. National herbarium of Cameroon, Yaoundé.
    • Edwards, S., Tadesse, M., Demissew, S. & Hedberg, I. (eds.) (2000). Flora of Ethiopia and Eritrea 2(1): 1-532. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.
    • Wood, J.R.I. (1997). A handbook of the Yemen Flora: 1-434. Royal Botanic Gardens, Kew.
    • Thulin, M. (ed.) (1993). Flora of Somalia 1: 1-493. The Royal Botanic Gardens, Kew.
    • Troupin, G. (ed.) (1983). Flora du Rwanda 2: 1-603. Musee Royal de l'Afrique Centrale.
    • 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

    • Lind & Tallantire, Fl. Pl. Uganda: 62 (1962).
    • Engl. in Die Pflanzenwelt Ost-Afrikas und der Nachbargebiete, Theile C: 226 (1895).

    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

    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