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Proceedings of the Biological Society of Washington - Smithsonian Institution (Biological Society of Washington, 1930)

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Prodromus einer Flora des Kronlandes Salzburg und dessen angränzenden Ländertheilen ... - Hinterhuber, Julius, 1810 -1880 (Druck der Oberer'schen Buchdr, 1851)

Prodromus florae Hispanicae :seu Synopsis methodica omnium plantarum in Hispania, sponte nascentium vel frequentius cultarum quae innotuerunt - Willkomm, Moritz, 1821 -1895 (E. Schweizerbart, 1880)

Prodromus florae hispanicae, seu synopsis methodica omnium plantarum in Hispania - Willkomm, Moritz, 1821 -1895 (E. Schweizerbart, 1880)

Production et fixation des variétés dans les végétaux - Carrière, E.-A. (Elie-Abel), 1818 -1896 (Libraire agricole de la Maison Rustiane, 1865)

Prof. dr. Thom©♭'s Flora von Deutschland, ©sterreich und der Schweiz in wort und bild f©ơr schule und haus - Thomé, Otto W. (Otto Wilhelm), 1840 -1925 (F. E. K©œhler, 1886)

Prof. dr. Thomé's Flora von Deutschland, Österreich und der Schweiz, in wort und bild, für schule und haus ... mit ... - Migula, W. (Walter), 1863 -1938 (1886)

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Pugillus plantarum imprimis Hispanicarum, quas in itinere 1851-52 - Lange, Johan, 1818 -1898 (B. Luno, 1860)

Purdy's novelties and specialties : Spring, 1917 - Carl Purdy (Firm) (Purdy, 1917)

Die Pusztenflora der grossen ungarischen Tiefebene - Woenig, Franz, 1851 -1899 (Verlag von Carl Meyers Graphischem Institut, 1899)

Putney's 1955 garden book - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Putney Nursery, 1955)

Putney's 1958 garden book - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Putney Nursery, 1958)

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qing hai jing ji zhi wu zhi 青海经济植物志 - Guo, Benzhao (郭本兆) (qing hai ren min chu ban she青海人民出版社, 1987)

qing zang zi ran di li zi liao - Xu, Jinzhi 徐近之 (ke xue chu ban she)

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Quarterly trade catalogue of palms, ferns, orchids, flowering plants, stove plants, hardy perennials, seeds and bulbs, etc. etc. : January, February, March, 1895 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pitcher & Manda, 1895)

Quarterly trade catalogue of palms, ferns, orchids, flowering plants, stove plants, hardy perennials, seeds and bulbs, etc. etc. : January, February, March, 1896 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Pitcher & Manda, United States Nurseries, 1896)

Quarterly - Women's National Agricultural; Horticultural Association. (Published quarterly for W.N.A. and H.A. by J.B. Haines, 1914)

Rambles in search of wild flowers, and how to distinguish them - Plues, Margaret (Journal of horticulture and cottage gardener, 1864)

Range and pasture management - Sampson, Arthur W. (Arthur William), 1884 -1967 (John Wiley, 1923)

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Ranunculaceae (Crowfoot family) of New York State - Mitchell, Richard S., 1938 - (University of the State of New York, State Education Dept, 1982)

Rare alpine and perennial plant, fresh seeds - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Ralph E. Huntington, 1935)

Rare and unusual native plants from the Pacific Northwest - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Carl S. English, Jr, 1934)

Die Raupen der gross-schmetterlinge Europas - Hofmann, Ernst, 1837 -1892 (Verlag der C. Hoffmann, 1893)

Rawson's bulb hand book - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (W.W. Rawson & Co, 1907)

Rawson's bulb hand book - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (W.W. Rawson & Co, 1908)

Rawson's bulb hand book - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (W.W. Rawson & Co, 1909)

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