GLOSSARY AND INDEX. 



153 



Mesozoic Age, Pteddophytes of, 



66. 

 Micro (Gr. /iiKpoi, small), (as a prefix) 



small. 

 Midvein, the middle or main vain of 



a frond, pinna, pinnule, or segment. 

 Mimicry, 3. 

 Monoecious (Gr. fioi-o?, single, and 



otKo?, house), bearing the male and 



ftmale organs on different parts of 



the same plant. 

 Moonwort. l^ide Botrychi- 



um. 

 Mucronate (Lat. mucro, a sharp 



point), having the midvein prolonged 



beyond the pinnule, forming a sharp 



point. 

 Musci (mosses), 52. — Literature of, 



61. 



Myxomycetes, 51. — Literature 



of, 57. 



N 



Nephrodium. f. Dryopteris. 

 Nephrolepis, 117; also •5, 16, 7S. 

 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, ng; also 2, 3, s, 10, 17, 66, 



72, 78. 

 Oophyta (Gr. <ioi', an egg (spore), 



and ifivToi", plant). 

 Oosphere (Gr. i>ov, an egg), the 



female element of Pteridophytes. 

 Oospore (Gr. wof, an ^^%y and 



o-TTopos, a seed), the fertilized oci- 



sphere. 

 Ophioglossaceae, 12S; also 28.— 



Literature of, 31. 

 Ophioglossum, 128; also 6, 29, 30. 

 Orbicular (Lat. orbiculus, diminu- 

 tive of orbis, a circle), circular. 

 Orders, 4S- 

 Osmunda, 1^4; also 2, 3, 4, 5, 6, 18, 



19, 80. 

 Osmundaceae, 12, 79. 



Ostrich-fern. ^'/Vj'^ 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. 

 eiSos, form), having the form of an 



Paleaceous (Lat. palea, chaff), 

 clothed with chaffy hairs. 



Palmate (Lat. palma, the hand), 

 with the divisions spreading from the 

 end of the stalk lilce 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. faJ>iUa, a nipple), 

 bearing minute nipple-liice projec- 

 tions. 



Papyraceous (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. -nivj^, five, and- 

 Ywi'i'a, angle), having five sides. 



Perisporiaceae, 52.— Literature 

 of, 60. 



Peronosporeae, 51.— Literature 



of, 57- 



Petiole (Lat. peiio/us, diminutive of 

 pfs, foot), the stalk of a pinna or 

 pinnule. 



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

 78. 



Pilose (Lat. piius, hairy), covered 

 with soft hairs. 



Pilularia, 126; also 39, 6g. 



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 iX.zX. pintia, a feather 



