GLOSSARY. 839 



Cohesion : union of like parts or organs ; as petals with each other. 

 Cohort: a division of a sub-class ; as Cohort Glumales (Grasses and 



Sedges of sub-class Monocotyledons). 

 Cole&rhiza ; the root-cap. 



Collar, Collum : the point of junction of stem and root. 

 Collenehyma: tissue whose cells are thickened at the corners and 



situated under the epidermis. 

 Colored : not green. 

 Columella : the slpnder, elongated torus, as in Geranium ; the central 



column of a sporangium or capsule. 

 Column : the tube of monadelphous stameps ; the body formed by 



the union of stamens and pistil, as in Orchids. 

 Coma : a tuft ; a tuft of hairs. 

 Commissure : the face by which two carpels cohere ; as in Umbel- 



liferse. 

 Common hmdles : those flbro-vascular bundles which pass below into 



the stem, and above into the leaf. 

 Complanate: flattened. 

 Complete flower : one having the four parts — calyx, corolla, stamens, 



and pistil. 

 Complicate : folded upon itself. 

 Composite flower : one which consists of a head of florets, as in Com- 



positse. 

 Compovmd : not single ; composed of several parts. 

 Compressed : flattened lengthwise, or on two opposite sides. 

 Concepiacle : cavities in the tissue in which the reproductive organs 



are contained ; as in the Floridese. 

 Confluent : blending together. 

 Conidia: non-sexual spores; often borne on aerial branches or 



hyphse. 

 Coniferous : bearing cones. 

 Conjugatiion : fusion of the contents of two cells to form a new cell 



or spore, as in some Algse ; union of two cells equal in size 



and appearance. 

 Connate : united, or grown together from the first. ''•■'• 



Connaie-perfoliate leaves : opposite, with bases grown together through 



which the stem passes. 

 Connective : the part of the filament between the two anthers. 

 Oonnivent : coming in contact or converging. 

 Contorted : twisted, same as convolute. 

 Contracted : narrowed or shortened. 

 Convolute: (in vernation) rolled up from one edge; (in aestivation) 



twisted, or with one edge of each petal overlapping that of 



the next. 

 Copulation : union of swarm spores, etc. ; fusion of two masses of 



protoplasm. 

 Cordate: heart-shaped. 

 Coriaceous : leathery. 



Cork : a kind of tissue with firm, dry cell-walls, destitute of cell- 

 contents and impermeable to liquids and gases. 



