GLOSSARY 373 



Marcescent, withering and remaining on the plant. 



Marginal, on the edges. 



Mealy, as if powdered with flour, p. 345. 



Median plane, the vertical plane in a lateral flower, p. 123. 



Membranous, thin, and like soft paper in texture. 



Metamorphosed, altered. 



Metamorphosis, change during the course of evolution, p. 45. 



Micropyle, the minute orifice between the integuments through which 



the pollen-tube reaches the embryo-sac, &c. 

 Microspore, the smaller of the two kinds of spores met with in certain 



Cryptogams, p. 99. 



Midrib, the axial vascular strand of a leaf, &c. 

 Modification, changes of form, texture, &c., brought about in the course 



of evolution, p. 45. 



Monadelphous, in one cluster or bundle. 

 Monandrous, having only one stamen. 

 Monocarpellary, of one carpel only. 

 Monochasium, a false axis built up of repeated branches, each ending in 



a flower, and the whole straightened out, p. 30. 

 Monochlamydeous, with one floral envelope only. 



Monoclinous, of flowers containing both stamens and pistil: hermaphro- 

 dite, p. 274. 



Monoacious, both c? and ? flowers on the same plant. 

 Monopetalous, same as Gamopetalous, p. 63. 

 Monopodium, an axis of one continuous forward growth, p. 9. 

 Monosymmetrical, with only one plane in which the flower can be cut 



into symmetrical halves. 

 Monstrosity, where the structure, shape, &c., depart so seriously from 



the normal as to obscure the latter, p. 43. 

 Morphology, the science of form and position as interpreted by the study 



of development. 



Mother-cell, the cell which by further division yields pollen, spores, &c. 

 Mucilaginous, gum-like, p. 176. 

 Mucro, a small sharp point, p. 181. 



Mucronate, provided with a small sudden sharp point, p. 182. 

 Multiaxial, with several axes. 

 Neck-cell, the cell in the neck of an archegonium. 

 Nectary, a honey-secreting tissue. 



Nodes, the places where leaves are attached to the shoot, p. 46. 

 Nodose, with knot-like swellings, p. 191. 

 Non-essential organs, sepals and petals, p. 4. 



Nucellus, the inner part of the ovule, invested by the integuments. 

 Nucleus, a special cell-content. 



