THE ORIGIN OF ANGIOSPERMS. 53 
It is only proposed here to recapitulate briefly the main points in the 
morphology of the fructification of Bennettites. Fora full account the reader 
is referred to Wieland's excellently illustrated monograph. 
The structure of the strobilus is illustrated by figs. 2 & 3 taken from 
Wieland’s book *. As Dr. Scott f has pointed out, it is evident that “in 
approaching this subject we must divest our minds of all preconceptions 
drawn from a knowledge of existing Cycadean cones.” 
Fig. 2. 
Diagrammatic sketch of a longitudindal section through the amphisporangiate cone of 
Bennettites (Cycadeoidea) dacotensis, Ward. About natural size, (After Wieland.) 
The species, which may be regarded as typical from our point of view, 
is Bennettites (Cycadeoidea) dacotensis, Ward, from the Black Hills of South 
Dakota. As is invariably the case in this genus, the fructifications are 
borne laterally, wedged-in between the persistent leaf-bases of the stem. 
In all the examples, so far obtained, the cone is quite mature, and has 
reached the fruiting stage. 
* Wieland (1906) text-figs. 87 & 88 on pp. 164-5. 
+ Scott (1900) p. 464, 
