2 44 
Journal of Agricultural Research 
Vol. XXVH, No. 5 
The percentage of seeds set in the spikelet decreases from the lowest 
to the highest position, little difference existing, however, between the 
first and second positions. 
In additional experiments flowers were observed to open without 
dehiscence of the anthers when submerged in water. Also, full and 
apparently normal blooming occurred in continuous darkness. Tem¬ 
peratures of 55 0 F. and below checked blooming in certain flowers, 
although pollen was discharged from anthers of flowers previously opened 
when die temperature was reduced as low as 52° F. 
LITERATURE CITED 
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1879. Uber das auebIvOhen der graser. In Verhandl. Naturhist. Med* 
Ver. Heidelberg, n. F., Bd. 2, p. 261-273. 
(2) FrOwirth, Carl. 
1905. das bluhen von weizen und hafer. In Detit. Landw. Presse, Jahrg* 
, 32, p. 737 ~ 739 > 747 - 748 , ihus. 
(3) Godron, D. A. 
1873. de la floraison des graminees. In Mem. Soc. Sei. Nat. Cherbourg, 
t. 17 (s£r. 2, t. 7), p. 105-197. Bibliographical footnotes. 
(4) Hays, Willet M. 
1901. plant breeding. U. S. Dept. Agr. Div. Veg. Phys. and Path. Bui. 
29, 72 p., 21 fig., 6 pi. 
(5) Kirchner, Oskar. 
1888. FLORA VON STUTTGART UND UMGEBUNG. 767 p. Stuttgart. 
(6) Knuth, Paul. 
1906-07. handbook of flower pollination . . . transl. by J. R. A* 
Davis. 3 vol. Oxford. 
(7) Koernicke, F. A., and Werner, Hugo. 
1885. handbuch des getreidebaues. 2 vol. Berlin. 
(8) Leighty, C. E., and Hutcheson, T. B. 
1919. ON THE BLOOMING AND FERTILIZATION OF WHEAT FLOWERS. In JoUT. 
Amer. Soc. Agron., v. 11, p. 143-162, fig. 11-12. 
(9) Obermayer, Ernst. 
1916. UNTERSUCHUNGEN OBER DAS BLOHEN UND DIE BEFRUCHTUNG VON 
winterroggen und winterweizen. In Ztschr. Pflanzenzuchtung, 
Bd. 4, p. 347-403. 
(10) Percival, John. 
1921. the wheat plant, x, 463 p., 228 fig. London. Bibliography, p. 
441 - 453 - • 
(11) Rimpau, Wilhelm. 
1882. das bluhen des getreides. In Landw. Jahrb., Bd. u, p. 875-919. 
(12) Salmon, Cecil. 
1914. sterile florets in wheat and other cereals. In Jour. Amer. Soc. 
Agron., v. 6, p. 24-30, pi. 1-2. 
(13) SmTKOWA, T. 
1914. DAS BLUHEN UND DIE BESTAUBUNG BEI EINIGEN FORMEN DES SOMMER- 
weizens. In Zhur. Opuitn. Agron. (Russ. Jour. Exp. Landw.), t„ 
15, p. 155-180. In Russian, German resum£, p. 178-180. 
