CXXI. CUPULIFEFLE.— CXXII. CERATOPHYLLE^. 509= 



507. Fagus Moorei, F. v. M. 



(A) Flowering branchlet, (B) leaf from a sterile branchlet. 



508. Ceratophyllum demersum, Linn. 



(A) Portion of plant in fruit, nat. size, (B) fruit with prickles, (C) male flower, enl. 



