ON NAIAS GRAMINEA DEL., VAR. DELILEI MAGNUS. 31 



Fig. 77. JV. graminea. — Antheriferous flower not fully ripe; enlarged y. 



78: N. graminea. — Mature antheriferous flower ; enlarged y. 



79. N. graminea. — Globose pollen; enlarged »f". 



80. N. graminea. — Elliptieo-oylindrical pollen ; enlarged 1 !". 



81. N. graminea. — Fruit, with immature pistilliferous flower in the same 



bract; enlarged y. 

 82 and 83. N. graminea — Fruits nearly mature ; enlarged y . 



84. N. graminea. — Supposed ridges and pits, of hexagonal outline, on 



surface of fruit ; as seen- with a z % objective, Lieberkuhn and 

 Kelner B eye-piece. 



85. N. fiexilis. — Bidges and pits, of quadrangular outline, on surface 



of fruit ; as seen with a -j* 5 objective, Lieberkuhn, and a Kelner 

 B eye-piece. 



86. N. graminea. — Three mature fruits and an immature pistilliferous 



flower in the same verticil; enlarged y. 



87. N.flexilis. — Mature fruit from Loch Cluny specimen; enlarged \f. 



88. N. graminea. — Perianth removed from fruit ; enlarged, y. 



89. N. graminea. — Transverse section of the root ; enlarged y. 



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