Die Zahl tier Raudbliiten an Kompositenkopfchen. 

 Jahrb. f. Wiss. Rot. Bd. 30. 1897. H. 



We Id on, W. R R. 58.11.5. 



Change in organic correlation of Ficaria ranunculoides during 

 the Flowering season. 

 Biom. Vol. I. 1901. S. 



Wei don, W. F. R. 58.11.5. 



Seasonal change in the Characters of Aster prenanthoi- 

 dea Muhl. 

 Biom. Vol. II. 1902. S. 



West gate, J. M. 58.11.5. 



Variegated Alfalfa. 

 U. S. Dept. Agr. Bur. Plant. Ind. Bui. 169 p. 1 03 PL I -IX. 



n iicox, &. M . 58.21.5. 



Numerical Variation of the Rayillowers of Compositae. 

 Bot, Gazette, Vol. XXXIII, p. 463-465 June 1902. H. 



NNolk, P. C. van do, 311:58.11.57. 



Previous researches into some statistics of Coffea. 

 Zeitschr. f. Ind. Abst. und Verb. Bd. X p. 136. H. 

 Wolk, P. C. van d e r. 311:58.11.57. 



Further researches in the statistics of Coffea. 

 Zeitschr. f. Ind. Abst. und Verb. Bd. XI. p 118—355 

 en Bd. XIII p. 176. 



