e-Key v3 - Geigeria
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Asteraceae - Inuleae - Geigeria Griess.

Description :

  • Perennial herbs, rosulate-acaulescent or variously branched, subshrubs or small shrubs
  • Stems erect or prostrate, glabrous or variously hairy, often glandular-punctate, winged or not
  • Leaves alternate, sessile, generally linear to lanceolate, entire or denticulate, usually glandular-punctate
  • Capitula radiate, few- to several-flowered, sessile, solitary or few, in terminal or axillary clusters
  • Involucre ovoid or globose; bracts in many rows, outer bracts usually with foliaceous appendages
  • Receptacle convex to conical, epaleate but with many bristles
  • Ray florets female, marginal; corolla yellow, tube 3- or 4-toothed or -lobed, oblong or linear-oblong; lamina longer than tube; ovary oblong; style terete, with linear, obtuse branches
  • Disc florets bisexual, fertile; corolla tube slightly narrowed upwards, with linear-lanceolate lobes ± half as long as tube
  • Anther bases sagittate; with lanceolate, apical appendage
  • Style terete, slightly swollen at base; branches linear, acute
  • Cypselas ellipsoid or turbinate, villous
  • Pappus usually of 10 broad scales with alternate ones sometimes awned
  • x = 10 (1 report)

Nomenclature:

  • Geigeria Griess.
    • Griesselich: 411 (1830)
    • Bentham: 337 (1873)
    • Oliver & Hiern: 367 (1877)
    • Harvey: 124 (1865)
    • Phillips: 810 (1951)
    • Merxmüller: 251 (1953)
    • Merxmüller: 74 (1967)
    • Hilliard: 283 (1977)
    • Wild: 53 (1982)
    • Anderberg: 286 (1994)
  • Diplostemma Hochst. & Steud. ex DC.
    • Candolle: 75 (1838).
  • Araschcoolia Sch.Bip. ex Benth.
    • Bentham: 337 (1873).
  • Thysanurus O.Hoffm.
    • Hoffmann: 127 (1889)

Distribution & Notes:

  • Global : Species 27, mostly in the southern part of Africa
  • Southern Africa : Species 21, widespread, absent from the Western Cape

References:

  • ANDERBERG, A.A. 1994. Tribes Inuleae , Plucheeae , Gnaphalieae . In K. Bremer, Asteraceae , cladistics and classification . Timber Press, Portland, Oregon
  • BENTHAM, G. 1873. Compositae . In G. Bentham & J.D. Hooker, Genera Plantarum 2. Lovell Reeve & Co., London
  • CANDOLLE, A.P. DE. 1838. Compositae . Prodromus 7,1. Treuttel & Würtz, Paris
  • GRIESSELICH, L. 1830. Plantarum rariorum et minus cognitarum fasciculus. Linnaea 5
  • HARVEY, W.H. 1865. Compositae . Flora capensis 3
  • HILLIARD, O.M. 1977. Compositae in Natal . University of Natal Press, Pietermaritzburg
  • HOFFMANN, K.A.O. 1889. Compositae . Die natürlichen Pflanzenfamilien 4,5
  • MERXMÜLLER, H. 1953. Revision der Gattung Geigeria Griesselich. Mitteilungen der Botanischen Staatssammlung München 1,7
  • MERXMÜLLER, H. 1967. Asteraceae . Prodromus einer Flora von Südwestafrika 139
  • OLIVER, D & HIERN, W.P. 1877. Compositae . Flora of tropical Africa 3
  • PHILLIPS, E.P. 1951. The genera of South African flowering plants, edn 2. Memoirs of the Botanical Survey of South Africa No. 25
  • WILD, H. 1982. The Compositae of the Flora zambesiaca area, 12. Inuleae (continued). Kirkia 12

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