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— Ogle s. Kerner von Mari 1 au n. 



1906. Oliver, F. W. On a point of biological interest in the Howers of Pleurothallis 

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1909. — — On the Floral Biology ofEpiseiamaeulata. — Rep. 60. Meet. Brit. 

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— — — s. K e r n e r , A. 



1910. Oltmanns, F. Über das Öffnen und Schliessen der Blüten. — Botan. Ztg. 1895. 

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1911. Ordway, J. M. Fertilization of Calochortus. — Papers New-Orleans Academy 

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1912. Ottavi. Impollinazione nei fiori delle vite. Casale 1880. 



1913. — — Primi saggi di ibridazione arteficiale. — Casale 1889. 8". 



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1915. — — Zweierlei Blüten bei Glechoma hederaeea L. — Bot. Zeit. 

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1916. V e r t n , E. Beitrag zur Kenntnis der Entwickelung und Vereinigung der 

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1917. Packard, A. L. Moths entrapped by an Asclepiad Plant (Phy sianthus) 

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— Packard s. Parona. 



1918. Page. C. G. Artificial Feeundation of Flowers. — Western Journal and Civilian. 

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1919. Palla, Ed. Über die Entwickelung und Bedeutung der Zellfäden im Pollen von 

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1920. Pammel, L. H. Color Variation in flowers of D e 1 p h i n i u in. — The botan. 

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1922. — — A lecture on pollination of flowers. Delivered at the State Horticultural 

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