ISSN:
1615-6110
Keywords:
Asteraceae
;
Lactuceae
;
Hypochoeridinae
;
Picris
;
Taxonomic revision: typification
;
characters
;
distribution
;
ecology
;
and evolution
;
Introduced species
;
Flora of tropical Africa
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00984121
Permalink