Ueber Poa sylvicola guss - Irmisch, Thilo, 1816 -1879 (1874)

Ueberblick der Flora arctica - Martens, Eduard von, 1831 -1904 (Druck von J.H. Demmler, 1859)

Uebersicht der Flora von Augsburg - Caflisch, J. Friedrich (Johann Friedrich), 1817 -1882 (Jenisch & Stage, 1850)

Unsere Freiland-Nadelhölzer; Anzucht, Pflege und Verwendung aller bekannten in Mitteleuropa im freien Kulturfähigen Nadelhölzer mit Einschluss von Ginkgo und Ephedra - Appel, Otto, 1867 -1952 (Hölder-Pichler-Tempsky, 1923)

Untersuchungen über die Bedeutung der Nektarien in den Blumen - Kurr, Johann Gottlob von, 1798 -1870 (Henneschen Buchhandlung, 1833)

An unusual list of unusual perennials - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Paramount Gardens, 1936)

Utkast til svenska växternas naturhistoria : eller, Sveriges fanerogamer skildrade i korthet med deras växställen och utbredning m. m., deras egenskaper, användning och historia i allmänhet - Nyman, Carl Fredrik, 1820 -1893 (N. M. Lindh, 1867)

Vade-mecum du botaniste dans la région parisienne. Tableaux synoptiques des familles, genres, espèces et variétés et 1634 figures de toutes les espèces de plantes croissant dans la région parisienne - Jeanpert, Henri-Édouard, 1861 -1921 (P. Klincksieck, 1911)

The various contrivances by which orchids are fertilised by insects - Darwin, Charles, 1809 -1882 (J. Murray, 1904)

The various contrivances by which orchids are fertilised by insects - Darwin, Charles, 1809 -1882 (John Murray, 1877)

The various contrivances by which orchids are fertilised by insects - Darwin, Charles, 1809 -1882 (Appleton, 1877)

Various contrivances by which orchids are fertilised by insects - Darwin, Charles, 1809 -1882 (Appleton, 1892)

The various contrivances by which orchids are fertilised by insects - Darwin, Charles, 1809 -1882 (J. Murray, 1899)

The various contrivances by which orchids are fertilised by insects - Darwin, Charles, 1809 -1882 (John Murray, 1890)

The various contrivances by which orchids are fertilized by insects - Darwin, Charles, 1809 -1882 (D. Appleton and Co, 1877)

The various contrivances by which orchids are fertilized by insects - Darwin, Charles, 1809 -1882 (D. Appleton and Co, 1895)

The various contrivances by which orchids are fertilized by insects - Darwin, Charles, 1809 -1882 (D. Appleton and company, 1884)

The vegetable kingdom; or, The structure, classification, and uses of plants, illustrated upon the natural system - Lindley, John, 1799 -1865 (Bradbury & Evans, 1853)