■ß54 E. Schiemann: Entstehung der Arten, Variation usw. 1915 und 191(3. [24 



411. Vetter, J. Neue Fesfuca -Hybriden. (Verh. k. k. zool.-bot. 

 €es. Wien 66, 1916, p. [127]-[130], 12 Textfig.) 



412. Victoi'iii, M. Prenanthes mainensis. notes on the morpho- 

 lof?y, taxonomy and distribution of this hybrid form. (Ottawa 

 Nat^ 20, 1916, p. 140-145.) 



413. Völker, H. Kreuzbefriichtung beim Blut Weiderich 

 (Lythrum salicaria) (trimorphe Heterostylic). (Natur 6. 1915, p. 323 

 bis 325.) - Ref. Bot. Ctbl. 135, 1917, p. 113. 



414. Vollmann, F. Eine kurzgespornte Form des Bastardes 

 Piatanthera bifolia x chlorantha. (Mitt. Bayer. Bot. Ges. 3, 1915, p. 206 

 Ibis 207.) - Ref. Bot. Ctbl. 129, 1915, p. • 103. 



415. Vollmaiin, F. Die Bonifaciuslinde auf Wörth im Staffel- 

 see, ein Bastard. (Mitt. Bayer. Bot. Ges. 3, 1916, p. 367-368. 



416. Waauer, J. Cytisus Vadasii (C. austriacus L. var. Noeaniis 

 Rb. X C. ratisbonensis Schaff, f. virgatus Heuff.) J. Wagn. (Mag. Bot. 

 Lap. 14, 1915, p. 78-80.) 



417. AVagiier, .1. Neue Flockenblumen- (Cen/aur^a-) Bastarde. 

 (Mag. bot. Lap. 15. 1916, p. 231-235, 1 Tai. Magyarisch.) 



418. WaterLill, €. A new £p//oi7/um hybrid. (Lancashire a. Cheshire 

 Naturalist 8, 1916, p. 379-380.) 



419. Wylle, R. B. A hybrid ragweed. (Proc. Jowa Ac. Sc. 22, 

 1915, p. 127-128, 1 Taf.) 



420. Zimmermann, AV. Auf der Jagd nach Orchis mililaris X Aceras 

 anthropophora. (Älitt. bad. Landesver. Naturk. Freiburg 1915, p. 104 — 109.) — 

 Ref. Bot. Ctbl. 135, 1917, p. 27. 



421. Zimmoraiaim. W. Orchis DoUii V\'. Zim. ( = O.ustulatus X Simia) . 



- (AUg. Bot. Ztschr. 22, 1916, p. 49-52. 3 Textfig). 



422. Zsäk, Z. Einige interessante Hybriden in der Flora 

 von Budapest. (Mag. bot. Lap. 15, 1916, p. 60 — 61. Ungarisch.) — Ref. 

 Bot. Ctbl. 132. 1916. p. 502.) 



5. Zur Mutationstheorie. Nr. 423-477. 



a) Allgemeines, (vgi. auch Nr. 472, 474, 475.) 



423. Bailey, C. The story of the discovery, re-appearance 

 and disappearance of a species of Evening Primrose {Oenothera 

 Lamarckiana Ser.). (Proc. Cheltenham Nat. Soc. 3, 1915, p. 25-28.) 



424. Bartlett, H. H. The Status of the mutation theory with 

 ^special reference to Oenothera. (Amer. Naturalist 50, 1916, p. 513 — 529.) 



- Ref. Bot. Ctbl. 134. 1917, p. 214. 



425. Belling', J. The evening primrose varieties of de Vries 

 (Amer. Naturalist 49. 1915, p. 319-320.) 



426. Gates, R. R. The mutation factor in evolution with 

 particular reference to Oenothera. Macmillon, London 1915, 8'', 353pp., 

 114 Textfig. - Ref. in Science N. S. 42, 1915, p. 648, von Davis. 



427. Gates, R. R. Heredity and mutation as cell-phenomena. 

 (Amer. Journ. Bot. 2, 1915. p. 519-528.) - Ref. Z. f. i. A. u. V. 19, 1918, 

 p. 203 u. Bot. Ctbl. 140, 1919, p. 307. 



428. Gates, R. R. On the nature of mutations. (Journ. of 

 Heredity 6, 1915, p. 99-108.) - Ref. Bot. Ctbl. 129, 1915, p. 633. 



