van Overeem, Formen m. abweichend. Chromosomenzahl b. Oenothera. 57 



(80) Davis, Bradlay Moore, Cytological Studies on Oenothera. II. The 



Reduction Divisions of Oenothera biennis. (Annais of Botany. XXIV. 

 1910. p. 631—653. PL 52—53.) (C.) 



(81) — Genetical Studies on Oenothera. I. Notes on the Behavior of certain 



Hybrids of Oenothera in the first Generation. (Americ. Naturalist. 

 XLIV. p. 108—115.) (E.) 



(82) — Cytological Studies on Oenothera. III. A Comparison of the Reduction 



Divisions of Oenothera Lamarckiana and Oen.gigas. (Annais. of Botany. 

 XXV. 1911. p. 941—974. PL 71—73.) (C.) 



(83) — Genetical Studies on Oenothera. IL Some Hybrids of Oenothera biennis 



and Oe. grandiflora that resemble Oe. Lamarckiana. (Americ. Natu- 

 ralist. XLV. 1911. p. 193—233. 18 Fig.) (E.) 



(84) — Genetical Studies on Oenothera. III. Further Hybrids of Oenothera 



biennis and Oe. grandiflora that resemble Oe. Lamarckiana. (Americ. 

 Naturalist. XL VI. 1912. p 377—427. 15 Fig.) (E.) 



(85) — Was Lamarck's Evening Primrose (Oenothera Lamarckiana Seringe) 



a Form of Oenothera grandiflora Solander ? (Bullet, of the Torrey Bot. 

 Club. XXXIX. 1912. p. 519—534. PL 37—39.) (S.) 



(86) — Mutations in Oenothera biennis L? (Americ. Naturalist. XLVII. 



1913. p. 116—121.) (E.) 



(87) -- A much-desired Oenothera. (Plant World. XVI. 1913. p. 145 — 153. 



4 Textfig.) 



(88) . — The Problem of the Origin of Oenothera Lamarckiana de Vries. (The 



New Phytologist. XII. 1913. p. 233—241. 1 Textfig.) (S.) 



(89) — Progressive Evolution among Hybrids of Oenothera. (Nature. 1913. 



p. 387.) (E.) 



(90) — GeneticalStudiesonOenothera.IV. The Behaviour of Hybrids between 



Oenothera biennis and Oe. grandiflora in the second and third 

 Generations. (Americ. Naturalist. XLVII. p. 449—476, 547—571. 

 17 Fig.) (E.) 



(91) — Genetical Studies on Oenothera. V. Some reciprocal Crosses of Oeno- 



thera. (Zeitschr. f. ind. Abst.- u. Vererb. -Lehre. XII. 1914. S. 169—205. 

 22 Fig.) (E.) 



(92) — Parallel Mutations in Oenothera biennis L. (Americ. Naturalist. XLVIII. 



1914. p. 498—501.) (E.) 



(93) — Professor de Vries on the probable Origin of Oenothera Lamarckiana. 



(Americ. Naturalist. XLIX. 1915. p. 59—64.) (S.) 



(94) — Additional Evidence of Mutation in Oenothera. (Americ. Naturalist. 



XLIX. 1915. p. 702—706.) (E.) 



(95) — A Method of Obtaining complete- Germination of Seeds in Oenothera 



and of Recording the Residue of sterile seed-like Structures. (Proc. 

 Nat. Acad. of Sei. I. 1915. p. 360.) (Ph.) 



(96) — Review of Gates, The „Mutation Factor in Evolution with particular 



, Reference to Oenothera". (Science. N. S. XLII. 1915. p. 648—651.) 



(97) — The Test of a.pure Species of Oenothera. (Proc. of the. Americ. Phil. 



Society. LIV. 1915. p. 226—245.) (E.) 



(98) — Oenothera neo -Lamarckiana, Hybrid of Oe. franciscana Bartlett et 



Oe. biennis L. (Americ. Naturalist. L. 1916. p. 688—696.) (E.) 



(99) ---Hybrids of Oenothera biennis and Oe. franciscana in the first and 



second Generations. (Genetics. I. 1916. p. 197—221.) (E.) 



