plant classification

Elements of Structural and Systematic Botany
For High Schools and Elementary College Courses

Douglas Houghton Campbell

Tentamen Botanicum de Filicum Generibus Dorsiferarum
Mémoires de l'Académie Royale des Sciences de Turin vol. 5, 401-422

James Edward Smith

Species Plantarum, Sections IV-V

Carl von Linné

De Plantis Esculentis Insularum Oceani Australis Commentatio Botanica

Georg Forster

The Genus Pinus

George Russell Shaw

Species Plantarum, Sections XI-XIII

Carl von Linné

Ideen zu einer Physiognomik der Gewächse

Alexander von Humboldt

Species Plantarum, Sections I-III

Carl von Linné