GLOSSARY 253 



Mer'is-matic. Dividing into cells or segments by the formation of internal 



partitions; i. e., 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 tube enters the ovule. 



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



Mon'a-del'phous. Having the stamens united in 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. That branch of biology which deals with the structure of 



animals and plants, and treats of the forms of organs, describing their 



homologies. 

 My-ce'li-um. The 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 body of an ovule where the embryo is developed. 

 Nu-cle'o-his. 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 the attachment at the pointed end. 

 Ob-lan'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 composite. 



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



the leaf to the apex, parallel to the midvein. 

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



antheridia of mosses. 

 Par'a-site. A plant obtaining nourishment immediately from another plant 



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 the main wall of the ovary. 



