COMPARATIVE MORPHOLOGY OF SOME LEGUMINOSAE 



CONTRIBUTIONS FROM THE HULL BOTANICAL LABORATORY 190 



John N. Martin 



(with PLATES VIII-Xl) 



This investigation covers the development of the embryo sac, 

 embryo, and endosperm of Trifolium pratense, T. hybridum, T. 

 re pens, Medicago saliva, and Vicia americana. The work was 

 done at the University of Chicago and Iowa State College. I 

 wish to express my thanks to Professor Coulter and Professor 

 Chamberlain who supervised the work, and to Professor Pammel 

 at Iowa State College for valuable suggestions. 



Historical 



In 1839 and 1842 Schleiden and Vogel (8) described the 

 al development and the endosperm of the Leguminosae. They 



erm 01 more 



through the group. 



remamin 



Trifolium and Medicago, and none in Vicia. In 1855 Tulasne 

 [) described the proembryo of Lathyrus Aphaca; it produced a 

 kg filamentous susoensor and a distinct terminal embryo. Hof- 



some species of 



mbryo sac and proem 

 bus, Trifolium, Lupin* 



Lathyrus; he found a short massive proembryo in Trifoliu 

 In 1880 Strasburger (10) described a proembryo developing 

 long suspensor in several species of Lupinus and in Orobus verm 



multinucleate 



same 



gations of the embryo sac, proembryo, and endosperm in four 

 species of Lupinus. He found that the cells of the filamentous 

 suspensor are multinucleate and that ephemeral cell plates appear 

 during the division of the endosperm nuclei. In 1881 Guignard's 

 (3) work appeared, covering about 40 species of the Leguminosae. 



Botanical Gazette, vol. 58] 



[i54 



