e-Key <span id="jodit_selection_marker_1703147020407_48328787312780364" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Laur<span id="jodit_selection_marker_1703147020407_3690491839635943" 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 - MAGNOLIIDAE - MAGNOLIALES - Lauraceae

Compiled by M. Jordaan

Description:

  • Mostly evergreen trees or shrubs, often tall with buttresses, or twining parasitic herbs (Cassytha); bark and foliage usually aromatic; plants sometimes dioecious
  • Leaves simple, alternate, rarely opposite or subopposite, entire or slightly undulate, usually coriaceous, penninerved or digitately 3-5-nerved, with a very fine reticulum of tertiary veins, scale-like in Cassytha; stipules 0
  • Inflorescences cymose, racemose, capitate or false umbels; rarely flowers solitary, axillary or subterminal, rarely terminal; bracts small or 0, caducous or subpersistent and sometimes forming an involucre below the partial inflorescence; bracteoles present in Cassytha
  • Flowers bisexual or unisexual, or sometimes bisexual and unisexual mixed, regular, generally 3-merous, usually many, small and inconspicuous, mostly green or yellow
  • Perianth generally 3-merous; tube ovoid, turbinate or campanulate, sometimes enlarged and persistent in fruit
  • Tepals usually ± equal, free, in 2 whorls of (2)3, imbricate or in 1 whorl; sometimes 0
  • Stamens and staminodes together usually twice as many as tepals, in 3 or 4 whorls, 1 or 2 outer whorls usually adnate to perianth, and innermost row often of staminodes adnate to receptacle; filaments variable, often with gland at base; anthers basifixed, with 2-4 thecae opening by valves, those of outer stamens introrse, those of third series often extrorse, sometimes with operculum remaining attached to anthers; staminodes tepaloid, sagittate or ligulate
  • Ovary superior, rarely inferior, unicarpellate, sessile, ± surrounded or enclosed by receptacle, 1-locular; ovule solitary, pendulous, anatropous; style terminal, simple; stigma small, discoid, rarely 2- or 3-lobed
  • Fruit a 1-seeded berry, drupe or sometimes dry, indehiscent, free or ± surrounded by accrescent receptacle, or completely enclosed within it, often borne on a thickened fruiting pedicel
  • Seed with membraneous to coriaceous testa, sometimes adnate to pericarp and indistinct; endosperm lacking; embryo straight; cotyledons large, fleshy

Nomenclature:

  • Lauraceae
    • Jussieu: 80 (1789), as Lauri
    • Meisner: 1 (1864)
    • Bentham: 146 (1880)
    • Pax: 106 (1889)
    • Kostermans: 73 (1938)
    • Kostermans: 193 (1957)
    • Rohwer: 366 (1993)
    • Verdcourt: 1 (1996)
    • Diniz: 45 (1997)

Distribution & Notes:

  • Global: Genera ± 52; species over 2 000, mainly in tropics and subtropics of both hemispheres
  • Southern Africa: Genera 5 (1 exotic), species ± 11 (1 exotic)

References:

  • BENTHAM, G. 1880. Laurineae. In G. Bentham & J.D. Hooker, Genera plantarum 3,1. Lovell Reeve & Co., London
  • DINIZ, M.A. 1997. Lauraceae. Flora zambesiaca 9,2
  • JUSSIEU, A.L. DE. 1789. Lauri, les Lauriers. Genera plantarum secundum ordines naturales disposita. Herissant & Barrois, Paris
  • KOSTERMANS, A.J.G.H. 1938. The African Lauraceae 1. (Revision of the Lauraceae IV). Bulletin du Jardin Botanique de l'État Bruxelles 15
  • KOSTERMANS, A.J.G.H. 1957. Lauraceae. Reinwardtia 4,2
  • MEISNER, C.F. 1864. Lauraceae. In A. de Candolle, Prodromus 15. Masson & Sons, Paris
  • PAX, F. 1889. Lauraceae. Die natürlichen Pflanzenfamilien III, 2
  • ROHWER, J.G. 1993. Lauraceae. In K. Kubitzki, J.G. Rohwer & V. Bittrich, The families and genera of vascular plants - dicotyledons 2. Springer-Verlag, Berlin
  • VERDCOURT, B. 1996. Flora of tropical East Africa. Lauraceae

Resources:

  • Lauraceae genera:
Cassytha Cryptocarya Dahlgrenodendron *Litsea
Ocotea