Öfversigt af Kongl. Vetenskaps-akademiens forhandlingar - Kungl. Svenska vetenskapsakademien. (P. A. Norstedt & Söner, 1848)

Ogrody pofnocne... - Strumiffo, Josef. (1830)

Les Oiseaux d'Europe décrits par C. J. Temminck - Werner, Johann Carl. (1848)

Okens Lehrbuch der Naturgeschichte - Oken, Lorenz, 1779 -1851 (Bei Carl Heinrich Reclam, 1815)

Old-fashioned gardening; a history and a reconstruction - Tabor, Grace, 1873? - (McBride, Nast & company, 1913)

Om Linnés betydelse i botanikens historia : med anledning af Linné-festen i Lund den 10 Januari 1878 - Agardh, Jacob Georg, 1813 -1901 (Fr. Berlings boktr. och stilgjuteri, 1878)

Om utlåndske tråd : buskar och blomster-våxter, som kunna tåla svenska klimatet ... - Thunberg, Carl Peter, 1743 -1828 (Academiska boktryckeriet, 1820)

Om Westeråstrakten i botaniskt afseende - Troilius, Adolf Magnus, 1838 -1909 (Tryckt hos E. Westrell, 1860)

Omnium stirpium sciagraphia et icones : quibus plantarum et radicum tum in hortis cultarum, tum in vrbium fossis & muris, pratis, aruis, montibus, collibus, nemoralibus, fluviis, riguis & littoralibus, villis & pagis, spontè provenientium, nomina, figura, natura, natales, synonyma, vsus & virtutes, docentur : cum doctissimorum scriptorum circa eas consensu & dissensu - Chabrey, Dominique, 1610 -1669 (Sumptibus Samuelis de Tournes, 1678)

On the movements of petals / by Esther Pearl Hensel - Hensel, Esther Pearl. (University of Nebraska, 1905)

On the physics and physiology of protoplasmic streaming in plants - Gotch, Francis, 1853 -1913 (At the Clarendon press, 1903)

On the physics and physiology of protoplasmic streaming in plants - Ewart, Alfred J. (Alfred James), 1872 -1937 (Clarendon Press, 1903)

On the popular names of British plants : being an explanation of the origin and meaning of the names of our indigenous and most commonly cultivated species - Prior, R. C. Alexander (Richard Chandler Alexander), 1809 -1902 (F. Norgate; [etc., etc.], 1879)

On the popular names of British plants, being an explanation of the origin and meaning of the names of our indigenous and most commonly cultivated species - Prior, R. C. Alexander (Richard Chandler Alexander), 1809 -1902 (Williams and Norgate, 1870)

One hundred and twenty copper-plates of English moths and butterflies : representing their changes into the caterpillar, chrysalis, and fly states, and the plants, flowers and fruits whereon they feed : coloured with great exactness from the subjects themselves : with a natural history of the moths and butterflies describing the method of managing, preserving, and feeding them - White, Benjamin, approximately 1724 -1794 (Printed for Benjamin White, at Horace's-Head, Fleet-Street, 1773)

Onomatologia botanica completa : oder Vollständiges botanisches Wörterbuch ; worinn nicht nur alle Kunstwörter übersetzt und erklärt, die bekannte [sic] Pflanzen nach der Lehrart des Ritters von Linne beschrieben, ihre verschiedene Namen nach den berühmtesten Schriftstellern angeführt, und eine kleine Lebensgeschichte der vornehmsten Kräuterkundigen beygefügt, sondern auch die Heilskräfte und der Nutzen, den die Arzney-Wissenschaft, Landwirtschaft, Färberey, Vieharzney- und Scheidekunst aus denselben ziehen, aus den besten Schriften dieser Art und aus eigener Erfahrung erläutert werden von einer Gesellschaft erfahrner Pflanzenkundiger - Gmelin, Johann Friedrich, 1748 -1804 ([publisher not identified], 1778)

Onze flora. Beschrijving van de familiën, voornamste geslachten en soorten der in Nederland in het wild groeiende, verwilderde, verbouwde en aangeplante gewassen, alsmede van eenige fraaie en nuttige midden-europeesche planten - Hoffmann, Carl, 1802 -1883 (W.J. Thieme, 1900)

The Oölogist for the student of birds, their nests and eggs - Lattin, Frank H. (Frank H. Lattin, 1889)

Opera e periodicis collata - Vries, Hugo de, 1848 -1935 (A. Oosthoek, 1918)

Organographie der Pflanzen, insbesondere der Archegoniaten und Samenpflanzen - Goebel, K. (Karl), 1855 -1932 (G. Fischer, 1898)

Organographie der Pflanzen, insbesondere der Archegoniaten und Samenpflanzen - Goebel, K. (Karl), 1855 -1932 (G. Fischer, 1913)

Organographie vegetale ; ou, Description raisonnee des organes des plantes, pour servir de suite et de developpement a la theorie elementaire de la botanique, et d'introduction a la physiologie vegetale et a la description des familles, avec 60 planches en taille-douce - Candolle, Augustin Pyramus de, 1778 -1841 (Chez Deterville, libraire, rue Hautefeuille, no.8, 1827)

Organography of plants, especially of the archegoniatae and spermaphyta - Goebel, K. (Karl), 1855 -1932 (Clar. Press, 1900)

Organologisches, systematisches und Arten-Register zu den Tafeln des Handbuch's der botanischen Terminologie - Bischoff, Gottlieb Wilhelm, 1797 -1854 (J.L. Schrag, 1849)

Florist's journal (How and Parsons, 1840)

Florist's journal (How and Parsons, 1846)

Florist's journal (How and Parsons, 1847)

Florist's journal (How and Parsons, 1848)

Ornamental gardening for Americans. A treatise on beautifying homes, rural districts, towns, and cemeteries - Long, Elias A., 1849 -1917 (Orange Judd, 1885)

Ornis - International Ornithological Committee. (Carl Gerold's Sohn, 1889)

The Ottawa naturalist - Ottawa Field-Naturalists' Club (Ottawa Field-Naturalists' Club, 1906)

Our garden flowers; a popular study of their native lands, their life histories, and their structural affiliations - Keeler, Harriet L. (Harriet Louise), 1846 -1921 (C. Scribner's Sons, 1910)

Our new guide : autumn 1894 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Dingee & Conard Co, 1894)

Our new guide : autumn 1895 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Dingee & Conard Co, 1895)

Our new guide : autumn 1896 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Dingee & Conard Co, 1896)

Our new guide : autumn 1896 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Dingee & Conard Co, 1898)

Our new guide : autumn 1897 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Dingee & Conard Co, 1897)

Our new guide to rose culture : 1894 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Dingee & Conard Co, 1919)

Our new guide to rose culture and bulb growing : fall 1908 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Dingee & Conard Co, 1908)

Our new guide to rose culture : autumn 1904 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Dingee & Conard Co, 1904)

Our new guide to rose culture : autumn 1907 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Dingee & Conard Co, 1907)

Our new guide to rose culture : autumn edition 1916 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Dingee & Conard Co, 1916)

Our new guide to rose culture : autumn edition 1917 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (The Dingee & Conard Co, 1917)

Our new guide to rose culture. spring-flowering bulbs, roses and house plants for fall planting Autumn 1914 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Dingee & Conard Company, 1914)

... Our wholesale trade catalogue : 1929 bulb crop - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (F. Rynveld & Sons, 1929)

Out-of-the-ordinary bulbs, fall 1946 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Oakhurst Gardens, 1946)

Out-of-the-ordinary bulbs for 1958 : 30 years of catering to the bulb collector - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Oakhurst Gardens, 1958)

Out-of-the-ordinary bulbs for 1958 : 31 years of catering to the bulb collector - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Oakhurst Gardens, 1959)

Out-of-the-ordinary bulbs, orchids : 1950 - Henry G. Gilbert Nursery; Seed Trade Catalog Collection. (Oakhurst Gardens, 1950)

Outlines of classification and special morphology of plants - Balfour, Isaac Bayley, 1853 -1922 (Clarendon Press, 1887)

Outlines of classification and special morphology of plants - Goebel, K. (Karl), 1855 -1932 (Clarendon Press, 1887)

Oversigt over det Kongelige Danske videnskabernes selskabs forhandlinger = Bulletin de l'Académie royale des sciences et des lettres de Danemark - Kongelige Danske videnskabernes selskab. (A.F. Høst, 1842)

Oversigt over det Kongelige Danske videnskabernes selskabs forhandlinger = Bulletin de l'Académie royale des sciences et des lettres de Danemark - Kongelige Danske videnskabernes selskab. (A.F. Høst, 1894)

Une page d'histoire de la medecine : la thérapeutique sous les premiers Césars - Lépine, R. (Raphael), 1840 -1919 (F. Alcan, 1890)

Palaeontographica Americana - Paleontological Research Institution (Ithaca, N.Y.) (Paleontological Research Institution, 1941)

Palestine Exploration Fund : quarterly statement - Palestine Exploration Fund. (The Fund, 1888)

Pamphlets on forest protection (1900)

Pamphlets on silviculture (1899)

Pan Apum, eller Afhandling om de örter, af hvilka bien hälft draga deras honung och vax - Kungl. Svenska vetenskapsakademien. (Tryckt hos Direct. Lars Salvius, 1768)

Paradisi in sole paradisus terrestris - Parkinson, John, 1567 -1650 (Methuen & co, 1904)

Paradisi in sole, paradisus terrestris : or, a choice garden of all sorts of rarest flowers : with their nature, place of birth, time of flowering, names, and vertues to each plant, useful in physick, or admired for beauty. To which is annext a kitchen-garden furnished with all manner of herbs, roots, and fruits, for meat or sawce used with us. With the art of planting an orchard of all sorts of fruit-bearing trees and shrubs, shewing the nature of grafting, inoculating and pruning of them. Together with the right ordering, planting and preserving of them, with their select vertues: All unmentioned in former Herbals - Parkinson, John, 1567 -1650 (Printed by R.N. and are to be sold by Richard Thrale at his shop at the signe of the Cross-Keys at S. Pauls-gate, going into Cheap-side, 1656)

Paradisi in sole paradisus terrestris, or, A garden of all sorts of pleasant flowers which our English ayre will permitt to be noursed vp: with a kitchen garden of all manner of herbes, rootes, & fruites, for meate or sause vsed with vs, and an orchard of all sorte of fruitbearing trees and shrubbes fit for our land together with the right orderinge planting & preseruing of them and their vses & vertues - Lownes, Humphrey. (Printed by Humfrey Lownes and Robert Young, 1692)

Paradisi in sole paradisus terrestris, or, A garden of all sorts of pleasant flowers : which our English ayre will permitt to be noursed vp : with a kitchen garden of all manner of herbes, rootes & fruites for meate or sause vsed with vs : and, an orchard of all sorte of fruitbearing trees and shrubbes fit for our land : together with the right orderinge, planting & preseruing of them and their vses & vertues - Parkinson, John, 1567 -1650 (Printed by Hvmfrey Lownes and Robert Yovng, at the signe of the Starre on Bread-street hill, 1629)