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1897 | THE LIFE HISTORY OF SALIX 177 
Fic. 29. S. glaucophylla. Extreme development of the beak or “filiform 
carom 
Fic. 30. S. petiolaris. Egg apparatus projecting ; filiform apparatus 
feebly pieo® oped. 
Fic. 31. S. glaucophylla. Cells marked a may be three antipodals ; pri- 
mary endosperm nucleus apparently not divided ; if not antipodals the three 
cells may have resulted from the lower polar nucleus and the nucleus (ev) 
may not be the result of fusion. 
PLATE XV, 
G. 32. S. glaucophylla. Just after fertilization ; oospore is enlarged and 
has ae wall ; endosperm nucleus not yet esta 
Fig. 33. S. fetiolaris. Three cells marked a may be antipodals, or may 
explained as in fig. 37. 
Fig. 34. S. fetiolaris. Pollen tube has entered but fusion has not yet 
taken place ; endosperm nucleus has become very large. 
Fig. 35. S. petiolaris. Synergid persisting long after fertilization. 
Fic. 36. S. — Pollen tube entering between beaks of synergids ; 
fusion not yet effected ; primary endosperm nucleus very large. 
Fre. 37. S. eke Primary endosperm nucleus not yet divided, 
an abnormal delay. 
Fig. 38. S. PLEA Unusual persistence of erences synergids 
have no vacuoles and their nuclei are in an unusual position ; the pollen tube, 
of course, is not the one fon was concerned in fertilization : endosperm 
forming in the usual manner 
Fig. 39. S. petiolaris. Pollen tube between beaks of synergids; fusion 
has taken place, oospore very spherical; primary endosperm nucleus not yet 
divided. 
Fig. 40. S. giaucophyila. Entrance of male generative nucleus; this 
nucleus is lenticular and its volume is less than that of the oosphere nucleus, 
although the figure gives a contrary impression. 
PLATE XVI. 
Fie. 4t. 'S. petiolaris, First division of oospore. 
Fig. 42. S. glaucophylla. First division of oospore. 
Fig. 43. S. petiolaris. The suspensor cell has divided. 
' Figs. 44-46. S. fetiolaris. First division of the embryo. 
Fig. 47. S. petiolaris. Embryo of three cells; — of suspensor 
is divided. 
Fre. 48. S. petiolaris. Quadrant stage: second division of te embro 
bas been transverse all nuclei are shown; é 
- stage; second Aivision of embryo tne : 
