e-Key <span id="jodit_selection_marker_1708323729205_17895477266666626" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Chrys<span id="jodit_selection_marker_1708323729205_8822545104683817" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>ocoma
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Asteraceae - Astereae - Chrysocoma L.

Description:

  • Shrublets
  • Leaves ericoid, alternate, sessile, linear to oblanceolate, entire or rarely dentate, glabrous or pubescent
  • Capitula discoid or rarely radiate, usually solitary and terminal, sometimes corymbose, pedunculate
  • Involucre campanulate or globose; bracts in 4 rows, imbricate, with membranous margins
  • Receptacle flat or convex, sometimes honeycombed, epaleate
  • Ray florets, if present, female, yellow or blue
  • Style with 2 branches
  • Disc florets bisexual, fertile, yellow; tube often gradually widened above, 5-lobed
  • Anthers linear, ecalcarate and ecaudate; with triangular, apical appendage
  • Style linear, with 2 linear branches, with long, triangular appendages and sweeping hairs
  • Cypselas compressed, obovate, marginally ribbed, apically usually with 2 resin sacs in ribs, pubescent, brownish
  • Pappus in 2 rows; outer row of short, acute to obtuse scales, basally weakly united, rarely reduced to a ring, sometimes 0; inner row of many barbellate caducous bristles
  • x = 9 (polyploidy)

Nomenclature:

  • Chrysocoma L.
    • Linnaeus: 840 (1753)
    • Harvey: 93 (1865)
    • Merxmüller: 39 (1967)
    • Bayer: 259 (1981)
    • Bremer: 417 (1994)

Distribution & Notes:

  • Southern Africa: Species 20, widespread but not reaching Northern Province, Mpumalanga and Swaziland
    • 1 extending to Mozambique

References:

  • BAYER, E. 1981. Revision der Gattung Chrysocoma L. (Asteraceae-Astereae). Mitteilungen der Botanischen Staatssammlung München 17
  • BREMER, K. 1994. Asteraceae, cladistics & classification. Timber Press, Portland, Oregon
  • HARVEY, W.H. 1865. Compositae. Flora capensis 3
  • LINNAEUS, C. VON. 1753. Species plantarum. Laurentius Salvius, Stockholm
  • MERXMÜLLER, H. 1967. Asteraceae. Prodromus einer Flora von Südwestafrika 139