XIV 



GLOSSARY. 



Megasporangium. — The homologue amongst Cryptogams of 



the nucellus of flowering-plants. 

 Megaspore. — The homologue of the embryo-sac. 

 Microsporangium. — The homologue amongst Cryptogams oi: 



the pollen-sac of flowering-plants. 

 Microspore. — The homologue amongst Cryptogams of the 



pollen-grain of flowering-plants. 

 Monadelphous. — Of an androecium whose stamens are all 



united by their filaments. 

 Mono-, di'j trimerous, etc. — Of whorls composed of one, two, 



three, etc., members. 

 Monothecal. — Of an anther which possesses half the usual 



number of loculi. 

 Negative dedoublement. — The condition in which the 



primordium ontogenetically tends to divide, but in which 



the phylogenetic tendency is towards fusion. 

 Oligomerous. — Having few parts. 



Orthogonal. — Relating to four floral members arranged 



medianly and laterally. 

 Ovuliferous. — Bearing ovules. 



Palese. — The scale-leaves, usually two, enclosing the lodicules 



and essential organs of the grass-flower, and representing*, 



on one view, the perianth. 

 Panicle. — A much-branched inflorescence which is indefinite 



as regards its main axis, but definite as regards its 



subsidiary axes. 

 Pappus. — -The white hair- or bristle-like calyx of the florets 



of Compositse. 



Pedicel. — The stalk of a single flower in an inflorescence. 



Felory. — The change by which an irregular or asymmetric 

 flower has become regular and symmetrical. 



Petaloid. — Resembling a petal, partially changed into a petal. 



Petalomania. — The condition in which an excessive number 

 of petals are formed. 



Phyllomania. — The excessive formation of foliaceous struc- 

 tures. 



Pinnule. — A segment of the pinna of a compound leaf. 

 Pleiandrous. — Having an indefinite number of stamens. 

 Pleiotaxy. — Increase in the number of whorls. 

 Plurisporangiate. — Bearing many sporangia. 

 Polleniferous. — Bearing pollen. 



Pollinia. — The masses of agglutinated pollen-grains contained 



in the anthers of Orchids. 

 Polyadelphous. — Of an androecium whose stamens are united 



by their filaments into several sets. 



