e-Key v<span id="jodit_selection_marker_1709034192517_3800883845040124" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>3 - *Dittr<span id="jodit_selection_marker_1709034192517_7140754420301374" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>ichia
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Asteraceae - Inuleae - *Dittrichia Greuter

Description:

  • Annual or perennial herbs
  • Leaves alternate, sessile, lanceolate to linear, glandular, viscid, ± revolute or flat, entire or faintly denticulate, hairy
  • Capitula radiate, small, many together in rather dense terminal racemes
  • Receptacle epaleate, with scale-like ridges
  • Involucre cyathiform, involucral bracts cartilaginous, glandular
  • Ray florets female; corolla yellow, ± strap-shaped
  • Disc florets bisexual; corolla yellow, lobes short, smooth
  • Anthers ecalcarate, caudate, with branched tails; endothecial tissue polarised
  • Style with acute sweeping hairs, not reaching furcation
  • Cypselas ellipsoid, shorter than corolla, hairy, apically somewhat constricted, glandular; epidermis with elongated crystals
  • Pappus of barbellate, capillary bristles in 1 row, basally connate and concrescent into a cupule
  • x = 9

Nomenclature:

  • *Dittrichia Greuter
    • Greuter: 71 (1973)
    • Anderberg: 104 (1991)
    • Anderberg: 286 (1994)
  • Cupularia Godr. & Gren.
    • Grenier & Godron: 180 (1850) not of Link.
  • Inula of other authors, not of L.

Distribution & Notes:

  • Global: Species 2, Mediterranean
  • Southern Africa: Species 1: *Dittrichia graveolens (L.) Greuter, naturalised, Western Cape

References:

  • ANDERBERG, A.A. 1991. Taxonomy and phylogeny of the tribe Inuleae (Asteraceae). Plant Systematics and Evolution 176
  • ANDERBERG, A.A. 1994. Tribes Inuleae, Plucheeae, Gnaphalieae. In K. Bremer, Asteraceae, cladistics and classification. Timber Press, Portland, Oregon
  • GRENIER, J.C.M. & GODRON, D.A.G. 1850. In Flore de France 2. Dodivers, Besançon
  • GREUTER, W.R. 1973. In Exsiccatorum genavensium e conservatorio botanico distributorum fasciculus. Geneva. Vol. 4