Khaki Weed
Tan, scaley-looking flowers on small plant that grows flat against soil. Broadly elyptic leaves are dark green.
Cyathula
Scrambling to prostrate herb with light brown clusters of spiny seeds. This one found at Saiwa Swamp near Kitale.
Cyathula #2
Shrubby plant with long, scrambling branches. Inflorescence and developing seeds less prickly than #1.
Forest Burr
Scrambling plant in secondary forest. Long tough stems with opposite leaves and burr seed heads.
Aerva lanata
Low slightly woody stems, spreading and prostrate. Flowers white in closely packed spikes. Leaves ovoid to elliptic.
Aerva leucura
Stems reaching to 1.5 m from a woody base and topped with silvery white spikes of wooly inflorescences.
Burr-weed
Scrambling leafy plant with long snakey spikes of sharp burr-seeds.
Prickly Chaff Flower
Spikes of small pink and green flowers followed by a tough prickly stem. Fruit is a single-seeded achene. Common weed in gardens.
Amaranth
Tall, leafy green plant used as a pot herb. Triangular leaves w/ prominent veins. Terminal flowers are numerous, small, green and crowded with bracts.
Prickly Amaranth
Mostly herbaceous and growing prostrate. Leaf tips and leaf axils with sharp prickles. Flowers green set in short spikes.