20 Blütenbiologiache Litteratur. 



8288. Osten, C, Seltenheit der V erbe na- Bastarde in Argentinien. Abb. Nat. Ver. 

 Bremen XIV. (1898). p. 264. 



3289. Osterhout, W. J. V,, Problems of heredity. Contributions from the Botanical 

 Seminary of the üniversity of California 1898. 



3290. Overton, James B., Parthenogenesis in Thalictrum purpurascens. Bot. 

 Gaz. XXXIII. (1902). p. 363—875. — Ref.: Bot. Centralbl. Bd. 90, (1902). p. 25 

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3291. Packard, A. S., The Home of the Bees. Amer. Nat. I. 1868. p. 364-378; 

 596-606. 



3292. — The Parasites of the Honey-Bee. Americ. Nat. II. 1869. p. 195—205. (Nach 

 Edw. Assmuss, the Parasites of the Honey-Bee.). 



3293. — Lamarck, the founder of evolution, bis life and work. New York (Long- 

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3294. Pammel, L. H., Burnip, J. R. and Thomas, H. , Some Studies on the Seed 

 and Fruits of Berberidaceae. Jowa Acad. Sei. V. 1898. p. 11—25; cit. nach 

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3295. Patton, Observations on the genus Macropis. Am. Journ. Sei. and Arts. III. 

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3296. Pax, F., Aceraceae. In Euglers Pflanzenreich. Heft 8. Leipzig 1902. [Be- 

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3297. Penzig, 0., Beiträge zur Kenntnis der Gattung Epirrhizanthes Bl. Ann. 

 Jard. Bot. Buitenzorg XVII. 2. Part. 1901. p. 142—170. 



3298. Perkins, Janet R. , Monographie der Gattung Mollinedia. Englers Bot. 

 Jahrb. 27. Bd. 1900. p. 636—683. — Ref.: Bot. Centralbl. Bd. 82. p. 385; B. Jb. 

 1899. II. p. 460. 



3299. — Beiträge zur Kenntnis der Monimiaceae IL Monographie der Gattung 

 Siparuna. Bot. Jahrb. etc. herausg. v. A. Engler. 28. Bd. 1901. p. 660—705. 



3300. Perkins, Janet und Gilg, Ernst, Monimiaceae. In Englers Pflanzen- 

 reich. Heft 4. Leipzig 1901. [Bestäubung: p. 9.] 



3301. Pettit, Mrs. A. S., Arachis hypogaea. Mem. Torrey Bot. Club. Vol. IV. 

 N. 4. 



3302. Pf itzer, E., Orchidaceae-Pleonandrae. In Englers Pflanzenreich. Heft 12. 

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3303. Philippi, R. A., Botanische Mitteilungen. 2. Über eine Monstrosität der Sene- 

 cio vulgaris. Bot. Zeit. 1870. p. 863-864. 



3304. Pieters, A. J., Seed production and seed saving. Yearb. Dep. Agric. 1896, 1897. 

 p. 207—216. 



3305. — The sticky zones on Silene antirrhina. Asa Gray Bull. V. 1897. p. 110. 

 — Ref.: Bot. Jb. 1897. I. p. 29. 



3306. Piper, C. V., Where is the home ofCalypso? Bot. Gaz. XVL 189L p. 296. 



3307. Pirotta, R. e Longo, B., Osservazioni e ricerche sul Cynomorium cocci- 

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 —152. — Ref.: Bot. Centralbl. 86. Bd. (1901). p. 92—93. 



3308. — Osservazioni e ricerche sulle Cynomoriacee Eich, con considerazioni sul 

 percorso del tubo pollinico nelle Angiosperme inferiori. Annuario del R. Istituto 

 Botanico di Roma. Anno IX. 1901. Fase. 2. p. 97—115. 



3309. Planchen, J. E., Etudes sur les Nympheacees. Ann. Sei. Nat. Bot. III. 

 Ser. XIX. 1853. 



3310. Porter, Edna M. , Pages from a botanical note book. Asa Gray Bull. 1894. 

 p. 40-42. — Ref.: ß. Jb. 1896. L p. 147. (Kalmia latifolia) 



3311. — Note on the pollination of Epipactis viridiflora. Bull. BufFalo Bot. 



