INDEX AND GLOSSARY 



Aconitum (Monkshood), 93, 116 



Acropera, a genus of Orchidaceae, 

 106 



" Adlerfarn," the German name 

 for the common Bracken, de- 

 rived from the double-eagle 

 seen in section of the leaf- 

 stalk, 33 



Adventitious buds, additional 

 buds formed at points not in 

 the normal sequence, 132, 142 



Agencies for effecting distribu- 

 tion of germs, 98, 113, 161 



Agrostis, a genus of Grasses, often 

 called the "Bent"; but the 

 "Bent" of golfers is Ammo- 

 phila, 140 



Aira, a genus of Grasses, 140 



Algae of the sea and freshwater, 

 13 ; blue-green, 113 ; green, 

 113; red, 113; brown, 113 



Algal Flora, term used collectively 

 for Algae of the coast or fresh- 

 water, 13, 157 



Alternation of generations, the 

 alternating succession of two 

 phases in the life-history of 

 plants, as seen in Mosses and 

 Ferns, etc., 45 



Ammophila arimdinacea, see 

 Marram Grass 



Angiopteris, a genus of very 

 ancient Ferns, 107 



Animal agency, 96 



Animals, distribution by, 99, 

 113; movements of, 82; mo- 

 bility of, 161 ; predatory attack 

 by, 89 



Annulus, a ring of hardened cells, 

 which acts as a spring in open- 

 ing the sporangium of Ferns, 

 and scattering the spores, 38 



Antheridium, the male organ of 

 Ferns, and other land-growing 

 plants, which produces the 

 spermatozoids, 39, 40, 41, 71 



Antipodal cells, a group of cells 

 situated at the base of the 

 embryo-sac in the Higher Flow- 

 ering Plants, 73 



Archegonium, the female organ 

 in Ferns and other land- 

 growing plants: it produces 

 the ovum or egg, 39, 40, 42, 

 43 



Asclepiad, member of the Ascle- 

 piadaceae, a family of the 

 Higher Flowering Plants, 89 



Ascophyllum nodosum, a common 

 Brown Tangle (Alga) of our 

 coast, growing about half-tide 

 mark, 16 



