Glossary and Index. 109 



GLOSSARY OF TECHNICAL TERMS AND INDEX. 



Derivations from the Latin unless otherwise stafed. An asterisk {*) iniiicates an 

 illustration at the page thus marked. 



A. 



Acrogen, (Grr. akron^ the highest part, and g&mhOfn., to produce), a plant whose 

 growth takes place at the summit. 48. 



Acrosticheea, 52, 61. 



Acrostichum, (Gt. akron^ the highest part, and stichion, a row), a tropical genus 

 containing 172 species. Forms the type of Tribe Aerostlcheie. 68 ; also 20, 21, 30, 36*, 61. 



Aculeate, {actdeus, diminutive of aeas, a needle), armed with prickles. 



Adder-tongue. Vide Ophioglossum. 



Adiantum. (Gr. a, without, and diaiTiein, to wet; alluding to the smooth foliage.) 

 Contains 82 ferns mostly from tropical America. 78; also 20, 31, 38*, 39*, 62. 



Adnate, {ad to, nasct, to be born), growing fast to some other portion of the plant. 



AUosorus. Vide Cryptogramme. 



Analogy, (Gr. ana, according to, logos, ratio, proportion), similarity in function; 

 distinguished from h viology, indicating similarity in structure. 



Anastomose, (Gr. anastomoun, to open into), forming a net^work ; said of veins 

 which unite with each other. 



Aneimia, {Gr.analmia ? without blood), a small genus found chiefly in tropical 

 America; contains 27 species. 97; also 35, 64. 



Annulus, (Lat. a ring), the ring partly or completely surrounding the sporangium. 



Anophyte, (Gr. ano, upward, &nd phuton, a plant), a group of plants including the 

 mosses and liverworts. 49. 



Antheridium, (plu. antheridia). (Lat. antliera, an anther, and Gr. eidos. form), the 

 part containing the male element. 37 . 



Antherozoid, (Lat. antlwra, an anther, Gr. soon, an animal, and eidos, form), the 

 male element of cryptogams. 3S*. 



Archegonium, (plu. archegonia,) (Gr. archa, beginning, and gonos, seed), the part 

 containing the female element. 38*. 



Arcuate, (arciis, a bow), curved like a bow. 



Areola, (plu. areolae), (Lat. diminutive of area, an open place), a space enclosed by 

 anastomosing veinlets. 



Asexual Generation, the growth of a Cryptogam produced from the fertilized 

 oosphere. 39. 



Aspidieee, 51, 63. 



Aspidium, (Gr. aspidion, a small shield), a cosmopolitan genus containing 344 

 species. Forms the type of Tribe Aspidiese, 88 ; also 18, 20, 26, 27, 33*, 42, 63. 



Aspleniese, 51, 63. 



Asplenium, (Gr a, without, and spten, spleen; alluding to shape of the indusia), 

 a cosmopolitan genus containing 331 species. Type of Aitplenieae. S3; also 18, 19, 20, 21, 

 32, 43, 63. 



Auriculate, {auricula, diminutive of aurts, an ear), furnished with ear-like ap- 

 pendages. 



B. 



Beech-fern. Vide Phegopteris. 



Bipinnate, (big, twice, and p in/ia, a feather), twice pinnate. 



Bipinnatifid, (bis, twice, pinna, a feather, and Jlndere, to cleave), pinnate with the 

 pinnffi again pinnatifid. 



Bladder-fern. Vide Cystopteris. 



Blechneae, 51, 62. 



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