e-Key <span id="jodit_selection_marker_1703066109192_3447153391985591" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Boragin<span id="jodit_selection_marker_1703066109193_6460467084143025" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>aceae
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

DICOTYLEDON - ASTERIDAE - LAMIALES - Boraginaceae

Compiled by E. Retief

Description:

  • Annual or perennial herbs, shrubs or trees, variably hairy, often strigose, trichomes often with conspicuous multicellular bases
  • Leaves alternate, sometimes opposite, subopposite or rosulate at base, simple, sessile or petiolate, usually entire; stipules 0
  • Flowers bisexual, regular or occasionally irregular, in terminal or axillary, bifurcate cymes or in raceme-like or panicled groups, inflorescence branches frequently scorpioid and spirally inrolled when young, uncoiling as flowers open; bracts leafy, small or 0
  • Calyx persistent, sometimes accrescent in fruit; tube campanulate or cylindric, sometimes very short; lobes usually 5, imbricate or open, rarely valvate
  • Corolla (2-)4-7-lobed, imbricate or contorted in bud; tube cylindric, ± funnel-shaped, campanulate or rotate, the tube very reduced; throat often with (faucal) scales, fornices, thickenings or folds between lobes
  • Stamens as many as and alternating with corolla lobes, epipetalous, exserted or included; filaments sometimes dilated at base, sometimes with a densely hairy scale or protuberance where arising on corolla; anthers 2-thecous, opening by longitudinal slits
  • Disc present or 0
  • Ovary superior, entire or deeply 4-lobed, 2-locular with 2 ovules in each or with 4, 1-ovuled locules due to development of false partitions; placentation at times appearing basal but actually axile; style terminal or gynobasic (arising from between ovary lobes), entire or 2-4-fid or twice 2-fid; stigmas various
  • Fruit usually a schizocarp of four 1-seeded nutlets (mericarps), or drupaceous with four 1-seeded stones, rarely a 1- or 2-seeded loculicidal capsule; gynobase (receptacle) conical or pyramidal or flat
  • Seeds erect, oblique or horizontal; endosperm 0 or scanty; embryo straight

Nomenclature:

  • Boraginaceae
    • Jussieu: 128 (1789) as Borragineae
    • Candolle: 466 (1845) as Borragineae
    • Boissier: 123 (1879)
    • Gürke: 71 (1897)
    • Wright: 2 (1904)
    • Lawrence: 684 (1951)
    • Phillips: 625 (1951)
    • Melchior: 431 (1964)
    • Friedrich-Holzhammer: 1 (1967)
    • Riedl: 1 (1967)
    • Taton: 1 (1971)
    • Valentine & Chater: 83 (1972)
    • Airy Shaw: 150 (1973)
    • Mabberley: 74 (1989)
    • Martins: 59 (1990)
    • Al-Shehbaz: 1 (1991)
    • Nowicke & Miller: 3 (1991)
    • Verdcourt: 1 (1991)
    • Zomlefer: 218 (1994)
    • Riedl: 43 (1997)
  • Asperifoliaceae Rchb.
    • Reichenbach: 118 (1828)

Distribution & Notes:

  • Global: Genera ± 131, species ± 2500; widely distributed in mainly temperate and tropical regions of the Old and New World, with a major centre of diversity in the Mediterranean
  • Southern Africa: Genera 17 (4 exotic), species ± 105

References:

  • AIRY SHAW, H.K. 1973. Boraginaceae. A dictionary of the flowering plants and ferns, edn 8. Cambridge University Press, Cambridge
  • AL-SHEHBAZ, I.A. 1991. The genera of Boraginaceae in the southeastern United States. Journal of the Arnold Arboretum, supplementary series 1
  • BOISSIER, P.E. 1879. Borragineae. Flora orientalis 4. H. Georg, Geneva
  • CANDOLLE, A.P. DE. 1845. Borragineae. Prodromus 9. Treuttel & Würtz, Paris
  • FRIEDRICH-HOLZHAMMER, M. 1967. Boraginaceae. Prodromus einer Flora von Südwestafrika 120
  • GÜRKE, M. 1897. Borraginaceae. Die natürlichen Pflanzenfamilien 4, 3a
  • JUSSIEU, A.L. DE. 1789. Genera plantarum. Herissant & Barrois, Paris
  • LAWRENCE, G.H.M. 1951. Boraginaceae. Taxonomy of vascular plants. The Macmillan Company, New York
  • MABBERLEY, D.J. 1997. The plant-book, edn 2. Cambridge University Press, Cambridge
  • MARTINS, E.S. 1990. Boraginaceae. Flora zambesiaca 7,4
  • MELCHIOR, H. 1964. Boragineae. In H.G.A. Engler, Syllabus der Pflanzenfamilien. Gebrüder Borntraeger, Berlin-Nikolassee
  • NOWICKE, J.W. & MILLER, J.S. 1991. Boraginaceae. In M.D. Dassanayake, A revised handbook to the flora of Ceylon. Amerind Publishing Co. Pvt. Ltd., New Delhi
  • PHILLIPS, E.P. 1951. The genera of South African flowering plants. Memoirs of the Botanical Survey of South Africa No. 25
  • REICHENBACH, L. 1828. Asperifoliaceae. Conspectus regni vegetabilis. C. Cnobloch, Leipzig
  • RIEDL, H. 1967. Boraginaceae. Flora iranica 48
  • RIEDL, H. 1997. Boraginaceae. Flora malesiana 13
  • TATON, A. 1971. Boraginaceae. Flore du Congo du Rwanda et du Burundi. Boraginaceae
  • VALENTINE, D.H. & CHATER, A.O. 1972. Boraginaceae. Flora europaea 3
  • VERDCOURT, B. 1991. Boraginaceae. Flora of tropical East Africa. Boraginaceae
  • WRIGHT, C.H. 1904. Boragineae. Flora capensis 4,2
  • ZOMLEFER, W.B. 1994. Guide to flowering plant families. University of North Carolina Press, Chapel Hill