60 THE ORIGIN OF THE SEED-PLANTS 
would be vain to enter. Probably the great morphological conclusions 
of the last century may continue to hold good, but the recognition of 
the Seed-plants as an independent phylum, which has run its own 
course from early Devonian times onwards, must some day demand a 
reconsideration of all questions concerning Phanerogamic and Cryp- 
togamic relations 1). 
1) The writer made a preliminary statement of his present views before Section 
K of the British Association, in 1919, and an abstract is published in the Report 
for that year. See also his Presidential Address to Section K, British Association, 
1921. 
