P. hysterophorus

Parthenium hysterophorus in Kenya, photo © by Michael Plagens

In savanna pasture at Nairobi National Park, Kenya. Dec. 2014.

African Citril, Crithagra citrinelloides, © Michael Plagens

This plant has become abundant in areas of Kenya and the African Citril, a seed-eater, was found eating the seeds near Nairobi National Park.

Leaf of Parthenium hysterophorus in Kenya, photo © by Michael Plagens
  • Range: This is an exotic weed from tropical America and its presence can harm the quality of savanna for grazing mammals.
  • Disc Flowers: The disc flowers are numerous in a convex head. The heads are small and arranged in a panicle.
  • Ray Flowers: Three or four short ray like florets around the disc.
  • Phyllaries: Two series, five or so leaf-like bracts on the outside.
  • Pappus:
  • Leaves: The leaves are divided into narrow segments.
  • Herbaceous: Plants reach a meter tall.

Asteraceae -- Sunflower Family -- Heliantheae

More Information:

Kenya Natural History

Michael J. Plagens, Created on 7 September 2015,
updated 3 June 2016.