962 APPENDIX 



Extrafloral nectaries (858): VON XJEXKULI^GULDENBANDT, Ann. Jard. 



Bot. Buit. II, 6, 195-327, 1907. 

 Pollination in figs. (860): LECLERC DU SABLON, Rev. Gen. Bot. 20, 14 S., 



1908; 22, 65-69, 1910; TSCHIRCH, Ber. Deutsch. Bot. Ges. 29, 83-96, 



1911. 

 Cleistogamy (864): GOEBEL, Biol. Cent. 24, 673 ff., 1904; HACKEE, Oest. Bot. 



Zeit. 56, 81 ff., 1906; LECLERC DU SABLON, Rev. Gen. Bot. 12, 305- 



318, 1900; RITZEROW, Flora 98, 163-212, 1908. 

 Significance of cross pollination (866): BURCK, Biol. Cent. 28, 177-19S. 1908; 



DARWIN, Cross-and Self -Fertilisation, London, 1876; SHULL, Proc. Amer. 



Breeder's Assoc, 1908. 

 Flower duration (870): FITTING, Zeit. Bot. 1, 1-86, 1909; ^ 225-267, 1910. 

 Closing of flowers (871): BURGERSTEIN, Oest. Bot. Zeit. 51, 185-193, 1901; 



FARMER, New Phyt. i, 56-58, 1902; STOPPEL, Zeit. Bot. j, 369-453. 



1910. 

 Origin of floral structures (875) : ROBERTSON, Bot. Gaz. 37, 294-298, 1904. 

 Reproductive variation in the algae and fungi (878) : COPELAND, Bot. Gaz. 47, 



9-25, 1909; DANFORTH, Mo. Bot. Gard. Rep. 21, 49-59, 1910; FREUND, 



Flora 98, 41-100, 1908; HOYT, Bot. Gaz. 43, 383-392, 1907; KAUFFMAN, 



Ann. Bot. 22, 361-387, 1908; KLEBS, Jena, 1896; Jahb. Wiss. Bot. 35, 80- 



203, 1900; KNIEP, Jahrb. Wiss. Bot. 44, 635-724, 1907; LEWIS, Bot. 



Gaz. 50, 59-64, 1910; MORGENTHALER, Cent. Bakt. 27, 73-92, 1910; 



WAKEFIELD, Nat. Zeit. 7, 521-551, 1909; WILLIAMS, Ann. Bot. 19, 



531-560, i9°5- 



Artificial parthenogenesis (882) : DAUDIN, Bull. Sci. 43, 297-372, 1909; DE- 

 LAGE, Corapt. Rend. Paris Acad. 147, 553 ff., 1908; DONCASTER, Sci. 

 Prog. 3, 40-52, 1908; 4, 90-104, 1909; LOEB, Am. Jour. Physiol. 1899, 

 1900; New York, 1906; -Arch. Ges. Physiol. 118, 181 ff., 1907; Arch. Entwickl. 

 23, 479-486, 1907 ; Boston Zool. Congress, 1908. 



Reproductive variation in pteridophytes (884): MOTTIER, Bot. Gaz. 50, 209- 

 213, 1910; SHATTUCK, Bot. Gaz. 49, 19-40, 1910; WORONIN, Flora 

 98, 101-162, 1907; WUIST, Bot. Gaz. 49, 215-219, 1910. 



Vegetative and reproductive periods in seed plants (885): DIELS, Berlin, 1906; 

 FISCHER, Flora 94, 478-490, 1905; GOEBEL I and II; HOWARD, Halle, 

 1906; JOHANNSEN, Jena, 1906; KLEBS, Jena, 1903; Biol. Cent. 24, 

 257 ff., 1904, Halle, 1906; SELIBER, Rev. Gen. Bot. 21, 420 ff., 1909, 

 Jahrb. Wiss. Bot. 42, 155-320, 1905. 



Sex determination (895): BITTER, Ber. Deutsch. Bot. Ges. 27, 120-126, 1909; 

 BLARINGHEM, Bull. Sci. 41, 1-248, 1907; CORRENS, Jahrb. Wiss. Bot. 

 44, 124-173, 1907; 45, 66r-7oo, 1908; Berlin, 1907; Amer. Nat. 42, 811- 

 824, 1908; Ber. Deutsch. Bot. Ges. 26a, 686-701, 1908; DARLING, Bull. 

 Torr. Bot. Club 36, 177-199, 1909; DONCASTER, Sci. Prog. 3, 40-52, 

 1908; 4, 90-104, 1909; GOEBEL, Biol. Cent. 30, 657 ff., 1910; HARPER 

 Science 25, 379-382, 1907; lORNS, Science 28, 125-126, 1908; JOHNSON, 

 Jour. Exper. Zool. 9, 715-749, 1910; JORDAN, Pop. Sci. Mon. 74, 540 ff., 

 1909; Amer. Nat. 44, 245-252, 1910; McCLENDON, Amer. Nat. 44, 404- 

 411, 1910; MOBIUS, Biol. Cent. 20, 561-572, 1900; MOLLIARD, Rev. 



