Descriptions of four previously unknown fungi detected on collections of ne
crotic leaves of rare and endangered plant species from Kenya are given: Ce
rcospora extensa on Lobelia gibberoa (Campanulaceae), Cercosporella euphorb
iacearum on Zimmermannia ovata (Euphorbiaceae), Phaeoramularia isolonae on
Isolona cauliflora (Annonaceae) and Scolecostigmina lageniformis on Milleti
a oblata subsp. teitensis (Leguminosae). In addition, three collections of
the Cercospora apii aggregate from indigenous Kenyan plants are described a
nd discussed.