e-Key <span id="jodit_selection_marker_1709034414030_9525454981630408" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Dolicho<span id="jodit_selection_marker_1709034414030_20054395230818844" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>thrix
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Asteraceae - Gnaphalieae - Dolichothrix Hilliard & B.L.Burtt

Description:

  • Woody plants usually stunted due to growing in rock crevices; main stems usually firmly anchored in crevice, with many secondary and tertiary branches, often appearing one-sided on specimens; very old plants may develop a woody base with many buds and dead stems; new growth white-woolly, greying with age; secondary stems branching copiously from below capitulum of previous season, woolly-hairy; branches foliaceous throughout
  • Leaves small, scale-like, tightly appressed, not more than 2 mm long and just as wide, surface appearing shiny, very densely glandular
  • Capitula discoid, solitary or 2-4 terminal on branches, 24-28-flowered, spreading funnel-shaped from a narrow base
  • Involucral bracts 48-52, in several rows, white, not translucent, reflexed in upper third, tips opaque, milky-white
  • Receptacle flat, honeycombed
  • Flowers tubular, ± 3.5 mm long, scarcely widening at tip, lobes pilose outside, often reddish
  • Anthers basally tailed, apical appendages acuminate
  • Style bifid, basally swollen, branches slightly rounded
  • Nectary 0
  • Cypsela very densely hairy with twin hairs, hairs white, straight, with 5 narrow ribs
  • Pappus of 18-24 flattened bristles, fused in a ring at base, barbed to shortly plumose throughout, hairs fused into a flat tip with hair apices rounded and inflated

Nomenclature:

  • Dolichothrix Hilliard & B.L.Burtt
    • Hilliard & Burtt: 221 (1981)
    • Anderberg: 71 (1991)
    • Anderberg: 331 (1994)

Distribution & Notes:

  • Southern Africa: Monotypic: Dolichothrix ericoides (Lam.) Hilliard & B.L.Burtt endemic to Western and Eastern Cape

References:

  • ANDERBERG, A.A. 1991. Taxonomy and phylogeny of the tribe Gnaphalieae (Asteraceae). Opera Botanica 104
  • ANDERBERG, A.A. 1994. Tribes Inuleae, Plucheeae, Gnaphalieae. In K. Bremer, Asteraceae, cladistics and classification. Timber Press, Portland, Oregon
  • HILLIARD, O.M. & BURTT, B.L. 1981. Some generic concepts in Compositae - Gnaphaliinae. Botanical Journal of the Linnean Society 82