Abstract
Three species of the genusPicris L. are native in Tropical Africa:P. abyssinica Sch. Bip. (Ethiopia),P. xylopoda Lack, spec. nova (Nigeria, Ethiopia) andP. humilis DC. (Senegal, Mali). There are indications that the two perennial species,P. abyssinica andP. xylopoda, are related to and have evolved from a primitive Central Asiatic stock in a manner parallel to many African species ofCrepis L.P. humilis, on the other hand, is a small annual plant with a high number of derived characters. The introduced species of European origin growing south of the Sahara are briefly mentioned.
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Lack, H.W. The genusPicris (Asteraceae, Lactuceae) in Tropical Africa. Pl Syst Evol 131, 35–52 (1979). https://doi.org/10.1007/BF00984121
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DOI: https://doi.org/10.1007/BF00984121