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Home Home » GENERA Q-S » Senecio » Senecio rigidus
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Senecio rigidus

Senecio rigidus
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  • Senecio muirii flowers and buds
  • Senecio muirii leaves
  • Senecio muirii stem
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  • Senecio pleistocephalus fruiting
  • Senecio pleistocephalus leaves and stems
  • Senecio pleistocephalus ready for full bloom
  • Senecio pubigerus
  • Senecio rigidus
  • Senecio rigidus leaves and buds
  • Senecio sarcoides
  • Senecio sarcoides deformed by witches' broom
  • Senecio sarcoides dry flowerhead husks
  • Senecio sarcoides in a dense stand
  • Senecio sarcoides leaves
  • Senecio sarcoides shortly after flowering
  • Senecio sarcoides stems

Image information

Description

Senecio rigidus, the rough ragwort, sometimes called poisonous ragwort, is a robust shrub. It grows branched stems with rough, hairy and longitudinally lined surfaces, reaching heights around 1,5 m.

The small flowerheads are borne in large branched clusters called corymbs, flattish or shallowly rounded in shape. Flowerheads comprise both disc and ray florets, all yellow. The rays, only five or six in number on each flowerhead, are short, elliptic in shape with longitudinal undulations. The small yellow disc protrudes above the ring of ray florets. The individual flowerhead stalks or pedicels have surface scales; so do the involucres.

The species distribution in the Western and Eastern Cape is mainly along the coastal strip, inland in the west to Clanwilliam. The habitat is sandstone slopes, flats and gullies. The plant in the photo was seen on Table Mountain, flowering in November when flowering normally starts and continues to midsummer. The species is not threatened in habitat early in the twenty first century (Manning, 2007; Clarke and Mackenzie, 2007; iSpot; JSTOR).

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Photographer
Ivan Latti
Author
Ivan Latti
 
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