THE MICROSPORANGIUM 45 



28. MERRELL, W. D. A Contribution to the Life History of Silphium. 



Bot. Gazette 29 : 99-133. pis. 3-10. 1900. 



29. CONRAD, A. H. A Contribution to the Life History of Quercus. 



Bot. Gazette 29: 408-418. pis. 28-29. 1900. 



50. LOTSY, J. P. Rhopalocnemis phalloides Jungh., a Morphological- 

 systematical Study. Ann. Jard. Bot. Buitenzorg II. 2 : 73-101. 

 pis. 3-14. 1900. 



31. STRASBURGER, E. Einige Bemerkungen zu der Pollenbildung bei 



Asclepias. Ber. Deutsch. Bot. Gesell. 19 : 450-461. pi. 24. 1901. 



32. ROSENBERG, 0. Ueber die Pollenbildung von Zostera. Meddel. 



Stockholms Hogsk. Bot. Inst. pp. 21. 1901. 

 53. FRYE, T. C. Development of the Pollen in some Asclepiadaceae. 



Bot. Gazette 32 : 325-331. pi. 13. 1901. 

 34. WEBB, J. E. A Morphological Study of the Flower and Embryo 



of Spiraea. Bot. Gazette 33: 451-460. figs. 28. 1902. For 



correction of names see REHDER in Bot. Gazette 34 : 246, 1902. 

 .35. SHOEMAKER, D. N. Notes on the Development of Hamamelis 



virginiana L. Johns Hopkins Univ. Circ. 21 : 86-87. 1902. 



