e-Key v3 - Key to Arctoteae Genera
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.
  • Key to the genera of the tribe Arctoteae after Dyer: 659 (1975) and Hilliard: 529 (1977)
Backtrack a
  • Capitula discoid, massed in a cushion covering the crown of the root and surrounded by a rosette of leaves
Platycarpha
b
  • Capitula radiate, if discoid, then not massed in a cushion surrounded by leaves
002
Backtrack a
  • Involucral bracts ± free, the inner ones at least obtuse, scarious at the tips and on the margins
002
b
  • Involucral bracts connate at base or higher, acute or acuminate, often spine-tipped
002
Backtrack a
  • Pappus with subplumose bristles
Heterolepis
b
  • Pappus 0 or of scales
002
Backtrack a
  • Ray florets sterile, not producing cypselas
  • Pappus 0 or of small scales
Arctotheca
b
  • Ray florets female, producing cypselas
002
Backtrack a
  • Acaulescent herbs
002
b
  • Stems diffuse or matted
002
Backtrack a
  • Cypselas flat and deeply grooved on one face, convex and tubercled on the other
Arctotis
b
  • Cypselas turbinate
Haplocarpha
Backtrack a
  • Stems forming dense mats
  • Pappus of two rings of short, ovate-acuminate, laciniate scales
Dymondia
b
  • Stems diffusely branched
  • Pappus 0 or of 1 or 2 rows of larger or small scales
Arctotis
Backtrack a
  • Pappus 0
  • Shrublets
  • Branches slender, densely leafy up to the capitula
Cullumia
b
  • Pappus present
002
Backtrack a
  • Receptacle with outer honeycomb-cavities thick-walled, inner ones membranous
  • Pappus scales ciliate to fimbriate
002
b
  • Receptacle uniformally honeycombed
002
Backtrack a
  • Involucre bracts in 3 rows, the middle ones the largest
  • Receptacle not breaking up at maturity
Heterorhachis
b
  • Involucre bracts in 2 rows, outer ovate, inner slender
  • Receptacle breaking up at maturity
Didelta
Backtrack a
  • Annual herbs, sometimes wiry
  • Seeds germinating from within old capitula
002
b
  • Perennial herbs, subshrubs or shrubs, rarely annuals
  • Seeds not germinating within capitula
  • Pappus biseriate
002
Backtrack a
  • Disc florets with only a few fertile
  • Pappus short, coroniform, hidden by hairs of cypselas
Gorteria
b
  • Disc florets bisexual, all fertile
  • Pappus scales linear
Cuspidia
Backtrack a
  • Involucre bracts slightly fused at base, pungent-toothed or -lobed
Berkheya
b
  • Involucre bracts fused in the lower half, sometimes setose, not spinescent
002
Backtrack a
  • Pappus scales of outer whorl not overlapping, the inner ones equal or somewhat longer
  • Sap milky
Gazania
b
  • Pappus scales of outer whorl spirally overlapping, inner whorl small or obsolete
Hirpicium

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