Von Trautvetter, Rossiae Arcticae Plantae (1880), and Florae Rossicae Fontes (St Petersburg, 1880).
Plantae omnes utrinque affinitatem monstrant, uti territorium in mappa geographica."
He first published his views in 1736, and he thus writes - "Antheras et stigmata constituere sexum plantarum, a palmicolis, Millingtono, Grewio, Rayo, Camerario, Godofredo, Morlando, Vaillantio, Blairio, Jussievio, Bradleyo, Royeno, Logano, &c., detectum, descriptum, et pro infallibili assumptum; nec ullum, apertis oculis considerantem cujuscunque plantae fibres, latere potest."
He further tells us that by the natives Virginieae insulae the plant was called "openauk," and that it is now known in European gardens, but he makes no mention of its use as an esculent vegetable, and, indeed, includes it among "plantae malignae et venenatae."
140 species,' belonging to the Mollusca, Foraminifera, Echinodermata, Actinozoa and Plantae; but the researches of French geologists made the total number of Madagascar fossils known in 1907 to be not fewer than 280 species.