GLOSSAJiy AND INDEX. 



153 



Dentate (Lat. dens, a tooth) 



toothed. 

 Denticulate (Lat. dinticulus, di- 

 minutive of dins, tooth), finely 



toothed. 

 Devonian Agre, Pteridophytes of, 



66. 

 Dichotomous (Gr. Si'^a, asunder, 



and refiveLf, to cut), two-forked. 

 Dicl<sonia. Fide Dennstsed- 



tia. 

 Dimorphism, 3.— Literature of, 7. 

 DimorpVious (Gr. Si'i, twice, and 



jtitopi^^, shape, form), of two forms; 



said of ferns whose fertile fronds are 



unlike the sterile. 

 Dicecious (Gr. 5w, twice, and 01K09, 



house), bearing the male and female 



organs on different plants. 

 DisticVious (Gr. Sit, twice, and 



cTTt^o?, a row^, disposed in two rows. 

 Distribution, Geographic, 60.— 



Geologic, 61. — Local, 4. 

 Dryopteris, no; also 2, 5, 7, 8, 10, 



II, 16, 26, 42, 80. 



E 



EbeneouS (Lat. edenus, ebony), 

 black like ebony. 



Elater, the spirally coiled append- 

 ages of the spores of Equisetum. 



Endospore (Gr. evSoi', within, and 

 o-JTopos, a seed), the inner wall of the 

 spore. 



Epidermis (Gr. cTrt, upon, and 

 Mp\i.o.^ the skin), the external cover- 

 ing- of the plant. 



EpipFiytic (Gr. eirt, upon, and 

 ^uToi/, a plant), g-rowing upon an- 

 other plant, but not nourished by it. 



Equisetacese, 126; also 31.— Lit- 

 erature of, 34. 



Equisetum, 126; also 31, 33. 



Exospore (Gr. .ef«, outside, and 

 o-n-opds, a seed), the external covering- 

 of the spore. 



F 



Falcate (Lat.y*i/j^, a sickle), scythe- 

 shaped; slightly curved upward. 



Farinose (Lat. farina, ground 

 corn), covered with a white or yel- 

 lowish powder. 



Fern Allies, 28. 



Fern Structure, Literature of, 

 28. 



Ferns, jArtificial Synopsis of genera 

 of, 79. —Mode of growth, 2. — Time of 

 fruiting, 4.— Variation in, z. 



Ferruginous (J^^i. ferrum, iron), 

 resembling iron rust. 



Fertilization, 21. 



Fibrillose (Lat. ^bra, a thread), 

 formed of small fibres. 



Filiform (Lat. JHutn^ a thread, 

 forina^ form), thread-like. 



Filix, 119; also, 4, 5, 6, 16, 27, 80. 



Flabellate {hzi. ^abellum, a fan), 

 fan-shaped; broad and rounded at 

 the summit and narrow at the base. 



Flaccid (Lat. Jlaccus^ flabby), soft 

 and weak. 



Floating-fern, Vide Cera- 

 topteris. 



Flowering-fern, Vide Os- 

 munda. 



Foliaceous (Lat. yo/iww/, d. leaf), 

 having the nature of a leaf. 



Fovea (Lat. a small pit), the depres- 

 sion in the leaf of Isoetes containing 

 the sporangium. 



Frond (Lat.y>-iJ«j, a leafy bough), 

 that which answers to the leaf in 

 ferns, 8, z6. 



Fructification of Ferns, 10; of 

 Ophioglossace.«, 30; of Equisetufft^ 

 33; of Club-mosses, 35; of Isoetes^ 38; 

 of Marsiiia, 39; of Pilularia, 39; of 

 Azoila, 39; of Salvinia^ 40. 

 Fulvous (Lat. y«(!'»«j, reddish-yel- 

 low), tawny. 

 Fungi, 56. 



Genera, 45- 

 Generic Names, 47. 

 Geograpiiic Distribution, 60. 

 Geologic Distribution, 61. 



