SCIENTIFIC COMMITTEE, FEBRUARY 25. 



xxxix 



germination among the dicotyledons, no genus offers greater facilities for 

 observation than the common garden bean (Phaseolus). 



Let us assume for the moment that the issues have been confused by 

 the use of the terms monocotyledonous and dicotyledonous, and that the 

 true division should have been between plants with a simple cotyledon 

 and those with a sub- cleft cotyledon. 



Consider the sub-cleft cotyledon of Phaseolus. 



(A EProcess i. 

 from Eml 



Fig. 62. a. — Sketch of growing plant. 



Fig. 62. b. — Full-size drawing of seed cut in half on section line k k in pot. 

 These drawings were made from a living plant in Mr. Worsley's garden. 



From the uncleft base of the cotyledon rises directly the main lead of 

 the young plant, and in the opposite direction the roots descend. There 

 is no process connecting the embryo and the young plant. It springs 

 direct from the embryo and grows in both directions. The cotyledons 

 are in fact leaves, and from the axils between the cotyledons and the 

 lead of the young plant it is possible for bran ch growths to spring (vide 



