Listar por autor "Ewan, Joseph"
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A review of purdieanthus and lehmaniella, two endemic colombian genera of gentianaceae, and biographical notes on purdie and lehmann
Ewan, JosephThe genus Lisianthus as construed by A. H. R. Grisebach in 1839 comprised five sections, as follows: Macrocarpaea, Choriophyllum, Chelonanthus, Helia, and Calolisianthus. The same sectional treatment of the inclusive genus ...Universidad Nacional de Colombia Revistas electrónicas UN Caldasia. -
Colombian species of spigelia
Ewan, JosephNo recent systematic treatment of the Colombian species of Spigelia (Loganiaceae) exists. Two species were described in 1818 from New Granada (Colombia) by Humboldt, Bonpland and Kunth. The Panamá Canal Zone species ...Universidad Nacional de Colombia Revistas electrónicas UN Caldasia.