Parthenium
P. hysterophorus
In savanna pasture at Nairobi National Park, Kenya. Dec. 2014.
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.
- 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.