GLOSSARY 253 



Mer'is-matic. Dividiiij; into eolls or sof-meiits by the formation of internal 



partitions; i. c, the formation of new cells. 

 Mes^o-carp. The middle layer of a pericarp, consisting of three distinct 



layers. 

 Mi'cro-pyle. An opening in the outer coat of a seed through which the 



pollen tnho enters the ovule. 

 Mid'-rib, or mid'-vein. Tlie central vein of a leaf. 



Mon'a-del'phous. Having the stamens united iu one body by the filaments. 

 Mon'o-cot'y-le'don. A plant having only one cotyledon, or seed leaf. 

 Mo-noe'cious. Having stamens and pistils on the same plant. 

 Mon'o-pet'al-ous. Having but one petal. 

 Mor-phol'o-gy. 'I'iiat branch of biology which deals with the structure of 



animals and plants, and treats of the lonns of organs, describing tiieir 



homologies. 

 My-ce'li-um. Tlie white threads of filamentous growth of a fungus. 



No'men-cla'ture. The technical names used in any particular branch of 



science or art. 

 Nu-cel'lus. The essential Iwdy of an ovule wliere the embryo is developed. 

 Nu-cle'o-lus. A dense rounded body within a nucleus. 

 Nu'cle-us. A dense body within the protoplasm of a cell. 



Ob-cor'date. Heart shaped, with tlie attachment at the pointed end. 

 Ob-Ian'ce-o-late, Lanceolate^ narrowing toward the point of attachment. 

 Or'gan. Any member of a plant, as a leaf, a stamen, etc. 

 O'vule. The young seed. 



Pa'lea. Chaff, or chaff-like bract. 



Pal'et. Same as palea. 



Pal'mate. Lobed so that the sinuses point to the apex. 



Pan'i-cle. A branching raceme. 



Pa-pil'i-o-na'ceous. Resembling the butterfly, as in some of the legumes. 



Pap'pus. The awns, or bristles, which represent the calyx in conipositu'. 



Par'al-lel-vein'ed. Having the veins or nerves extending from the base of 



t]u> leaf to the apex, parallel to the midvein. 

 Pa-raph'y-sis. A minute-jointed filament among the arcliegonia and 



antheridia of mosses. 

 Par'a-site. A jilant obtaining noiirishiuent inimediately fi-om aiiotlier ])lant 



to which it attaches itself. 

 Pa-ren'chy-ma. Soft cellular plant tissue, like the pulp of leaves, having no 



wood fibre. 

 Pa-ri'e-tal. Attached to tlie nuiin wall of the ovarv. 



