| 11. | Phytogeography is often divided into two main branches : ecological phytogeography and historical phytogeography.
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| 12. | The term phytogeography itself suggests a broad meaning.
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| 13. | Von Humboldt advocated a quantitative approach to phytogeography that has characterized modern plant geography.
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| 14. | It is significant for its contributions to plant systematics, and to African floristics and phytogeography.
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| 15. | He was also interested in phytogeography.
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| 16. | In phytogeography, the Sonoran Desert is within the Sonoran Holarctic Kingdom of the northern Western Hemisphere.
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| 17. | He specializes in plant taxonomy, biosystematics and applications of techniques from molecular biology, phytogeography and phylogenetics.
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| 18. | He was the author of numerous works on descriptive botany, plant teratology, phytogeography and agricultural botany.
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| 19. | He was a leading authority of mosses, and also dealt with the systematics and phytogeography of flowering plants.
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| 20. | Afterwards he did biosystematic research on " Acer " in the Laboratory of botanical systematics and phytogeography.
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