e-Key <span id="jodit_selection_marker_1699876137010_7553359866556608" data-jodit_selection_marker="start" style="line-height: 0; display: none;"></span>v3 - Polh<span id="jodit_selection_marker_1699876137010_9180572140353029" data-jodit_selection_marker="end" style="line-height: 0; display: none;"></span>illia
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Interactive keys to the identification of seed plants of southern Africa using keys based on plant morphology.

Fabaceae - Papilionoideae - Crotalarieae - Polhillia C.H.Stirt.

Description:

  • Small, erect, much-branched shrubs up to 1.5 m tall
  • Leaves digitately 3-foliolate, shortly petiolate; stipules involucrate, adnate to petiole, completely sheathing twigs and clasping the stem
  • Flowers pale to deep golden-yellow, 1 or 2(-4), terminal on short shoots; bracts small, linear-lanceolate; ebracteolate
  • Calyx shorter than corolla, 2-lipped; upper lobes separate or somewhat united, triangular; lower lip formed from fusion of lateral and carinal lobes into a lip with 3 short teeth, fusion of lobes higher than vexillar lobes
  • Petals: vexillum broadly ovate, apex rounded or emarginate, claw less than half as long as blade; wing petals and keel petals ± equally long, both slightly pocketed, sculpturing upper basal and upper central or upper basal left central, intercostal, lunulate, becoming diffuse in patches or lunulate-lamellate
  • Stamens monadelphous; staminal tube split adaxially, consisting of 5 linear-oblong, basifixed anthers alternating with 5 ovate dorsifixed anthers
  • Ovary sessile or subsessile, compressed, densely hairy, 7-10-ovuled; style curving gently upwards to a small capitate stigma
  • Pod chartaceous, subsessile, narrowly oblong, sometimes slightly curved, plicate or flattened and impressed between seeds, indehiscent
  • Seeds dull, khaki to dark brown
  • x = 8 (1 report, polyploidy)

Nomenclature:

  • Polhillia C.H.Stirt.
    • Stirton: 167 (1985)
    • Van Wyk: 42 (1992)

Distribution & Notes:

  • Southern Africa: Species ± 7, endemic to the Western Cape

References:

  • STIRTON, C.H. 1985. Polhillia, a new genus of papilionoid legumes endemic to South Africa. South African Journal of Botany 52
  • VAN WYK, B.-E. 1992. The identity of Argyrolobium obsoletum and the correct name for species of Polhillia (Crotalarieae). Bothalia 22