e-Key <span id="jodit_selection_marker_1703060142608_8198392104330543" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Agav<span id="jodit_selection_marker_1703060142608_5956186649493653" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>aceae
SANBI Flora Keys Logo
Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

MONOCOTYLEDON - LILIIDAE - ASPARAGALES - *Agavaceae

Compiled by G.F. Smith

Description:

  • Robust, monocarpic, usually rosulate perennials arising from short rhizome or short erect caudex
  • Stem commonly with monocotyledonous type secondary growth
  • Leaves usually crowded in basal rosette, leathery to succulent, amplexicaul, persisting for many years; each vascular bundle with well-developed fibrous cap at phloem pole
  • Inflorescence apical, tall, fast-growing, terminating in a panicle, often massive
  • Flowers bisexual, regular or somewhat irregular, tubular, pedicellate, trimerous throughout
  • Perianth petaloid, 3 + 3, often fleshy, united below to form a tube
  • Stamens 3 + 3; anthers mostly dorsifixed, introrse, versatile, opening by longitudinal slits, linear to oblong
  • Ovary inferior, trilocular, with septal nectaries; placentation axile; ovules in 2 vertical rows in each locule; style terminal; stigma 3-lobed
  • Fruit a loculicidal capsule
  • Seeds many, flattened, centrally embedded in copious, very hard endosperm
  • x = 30

Nomenclature:

  • *Agavaceae
    • Cronquist: 1217 (1981)
    • Dahlgren et al.: 157 (1985)
    • Bogler & Simpson: 191 (1995)
    • Hernández: 57 (1995)
    • Ojeda Revah & Ludlow-Wiechers: 25 (1995)

Distribution & Notes:

  • Global: Genera 12, species ± 400, Old and New World tropics and subtropics, widely naturalised
  • Southern Africa: Genus 1 (*Agave, the largest and most widespread), species 2, naturalised

References:

  • BOGLER, D.J. & SIMPSON, B.B. 1995. A chloroplast DNA study of the Agavaceae. Systematic Botany 20
  • CRONQUIST, A. 1981. An integrated system of classification of flowering plants. Columbia University Press, New York
  • DAHLGREN, R.M.T., CLIFFORD, H.T. & YEO, P.F. 1985. The families of the monocotyledons. Springer-Verlag, Berlin
  • HERNÁNDEZ, L. 1995. Análisis cladístico de la familia Agavaceae. Boletin de la Sociedad Botánica de México 56
  • OJEDA REVAH, L. & LUDLOW-WIECHERS, B. 1995. Palinología de Agavaceae, una contribución biosistemática. Boletin de la Sociedad Botánica de México 56

Resources: