GLOSSARY AND INDEX. 



Acrogrenous (Gr. axpov, the high- 

 est part, and yevvav, to produce), per- 

 taining to plants whose growth takes 

 place at the summit. Includes Ferns, 

 Mosses, etc. 



Acrostichum, 81; also 5, 6, 12, 79. 



Aculeate (Lat. aculeus, diminutive 

 of acus, a needle), armed with 

 prickles. 



Adder-tongue. Vide Ophio- 

 glossum. 



Adiantum, 89; also 5, 13, 42, 80. 



Adnate (Lat. ad, to, nasci, to be 

 born), growing fast to some other 

 portion of the plant. 



Algae, 56. 



Allosorus. I'ide Crypto- 

 gramma. 



Analogy (Gr. ara, according to; 

 A.oyos, ratio, proportion), similarity in 

 function; distinguished from homolo- 

 gj; indicating similarity in struc- 

 ture. 



Anastomose (Gr. <u<a<rTo/uoOi>, to 

 open into), forming a network; said 

 of veins which unite with each 

 other. 



Anemia. Vide Ornithopte- 



ris. 



Annulus (Lat. a ring), the ring 

 partly or completely surrounding the 

 sporangium. 



Antheridium (plu. antheridiii) 

 (Lat. anthera, an anther, and Gr. 



<t'So, form), the part containing the 

 male element. 20. 



Antherozoid (Lat. anthera, an 

 anther; Gr. <aov, an animal, and 

 ei'Sos, form), the male element of 

 cryptograms. 20. 



Archegonium (plu. archegoni.i) 

 (Gr. dp\ri, beginning, and yovrj, off- 

 spring), the part containing the fe- 

 male element. 20. 



Arcuate (Lat. arcus, a bow), 

 curved like a bow. 



Areola (plu. areola;) (Lat. diminu- 

 tive of area, an open place), a space 

 enclosed by anastomosing veinlets. 



Asexual Reproduction in 

 Ferns, 27. 



Aspidium. Vide Dryopteris, 

 and Polystichum. 



Asplenium, 103: also 2, 3 , 5 , f, i 5) 

 27, 81. 



AurJCUlate (Lat. auricula, a little 

 ear), furnished with ear-like append- 

 ages. 



Azolla, 125; also 39. 



Beech-fern, vide Phegop- 

 teris. 



Bi (Lat. bis, twice), (as a prefix) two, 



twice or doubly. 



Bladder-fern. Vide Filix. 

 Blechnum, 102; also 15,81. 

 Botrychium, 68; also 2.3, 5, 19, 29, 



3, 43- 



