GLOSSARY AND INDEX. 



153 



Mesozoic Age, Pteridophytes of, 



66. 

 Micro (Gr. jxicp6s, small), (as a prefix) 



small. 

 Midvein, the middle or main vein of 



a frond, pinna, pinnule, or segment. 

 Mimicry, 3. 

 Monoecious (Gr. /ad?, single, and 



OIKOS, house), bearing the male and 



female organs on different parts of 



the same plant. 

 Moonwort. Vide Botrychi- 



um. 

 Mucronate (Lat. macro, a sharp 



point), having the midvein prolonged 



beyond the pinnule, forming a sharp 



point. 

 Musci (mosses), 47, 50. Literature 



of, 56. 

 Myxomycetes, 48. Literature 



of, 53- 



N 



Nephrodium. F/aVAspidium. 

 Nephrolepis, 117; also 6, 16, 78. 

 Nomenclature, 4. 

 Notholaena, 85; also 6, 9, 13, 76. 



Oak-fern. Vide Phegopteris. 

 Oblong, from two to four times as 



long as broad. 

 Obovate (Lat. ob, reversed, and 



ovum, an egg), inverted ovate. 

 Onoclea, 119; also 2, 3, 5, 10, 17, 66, 



72. 78. 

 Oophyta (Gr. u>6V, an egg (spore), 



and QVTOV, plant), 49. 

 Oosphere (Gr. o>6, an egg), *the 



female element of Pteridophytes. 

 Oospore (Gr. wo*', an egg, and 



o-rropos, a seed), the fertilized oo- 



sphere. 

 Ophioglossaceae, 128; also 28. 



Literature of, 31. 



Ophioglossum, 128; also 6, 29, 30. 



Orbicular (Lat. orbiculus, diminu- 

 tive of orbis, a circle), circular. 



Orders, 45- 



Osmunda, 174; also 2, 3, 4, 5, 6, 18, 

 19, 80. 



Osmundacese, 12, 79. 



Ostrich-fern. Vide Onoclea. 

 Ovate (Lat. ovum, an egg), having 



the form of the longitudinal plane of 



an egg with the base downward. 

 Ovoid (Lat. ovum, an egg, and Gr. 



eZSos, form), having the form of an 



egg. 



P 



PaleaceOUS (Lat. palea, chaff), 

 clothed with chaffy hairs. 



Palmate (Lat. palma, the hand), 

 with the divisions spreading from the 

 end of the stalk like the fingers of the 

 hand. 



Panicle (Lat. panicula, a tuft on 

 plants), an open cluster, consisting of 

 more or less branching stems bearing 

 fruit. 



Papillose (Lat. papilla, a nipple), 

 bearing minute nipple-like projec- 

 tions. 



Papy raceous (Lat. papyrus, paper 

 reed), having the texture of paper. 



Pedicel (Lat. Pediculus, diminutive 

 of pes, foot), the stalk of a sporan- 

 gium. 



Pellaea, 97; also 2, 3 , 6, 14, 77 . 



Peltate (Lat. pelta, a small shield), 

 shield-shape; said of an indusium 

 borne on a stalk attached at its centre. 



Pentagonal (Gr. n^re, five, and 

 yiavia, angle), having five sides. 



Perisporiaceae, 50. Literature 

 of, 54' 



Peronosporeae, 49. Literature 

 of, 54- 



Petiole (Lat. petiolus, diminutive of 

 pes, foot), the stalk of a pinna or 

 pinnule. 



Phegopteris, 108; also 5, 9, 16, 27, 

 78. 



Pilose (Lat. pilus, hairy), covered 

 with soft hairs. 



Pilularia, 126; also 39, 67. 



Pinna (Lat. a feather), the primary 

 division of a compound frond. 



Pinnate (Lat. pinna, a feather), hav- 

 ing the divisions of the frond ar- 

 ranged on the two sides of a common 

 rachis. 



Pinnatifid (Lat. pinna, a feather 



