GLOSSARY. 



Acuminate, tapering gradually to a point. 



Acute, having a distinct point, but not greatly 

 elongated. 



Adherent, attached more or less closely. 



Adnate, attached by growth, grown together. 



JEruginous, the blue-green color of verdigris. 



Aggregated, massed together. 



Akinete,- a nonsexual reproductive cell formed by 

 the massing of the contents of a vegetative cell, 

 the wall of the mother cell thickening and func- 

 tioning as the wall of the akinete. 



Alternate, placed on opposite sides of a stem at dif- 

 ferent levels. 



Anastomose, to run together and fuse into more or 

 less of a network. 



Anastomosis, the union of filaments or tubes with 

 each other. 



Ancipitate, two edged, flattened or compressed. 



Antheri<Uum(pl. antheridia} , the organ forming male 

 cells. 



Anticlinal, perpendicular to the surface. 



Apical, at or near the apex or tip. 



Apiculum, a short, sharp point. 



Aplanospore, a nonsexual reproductive cell formed 

 by the massing of the contents of a vegetative cell 

 and the formation about this of a new cell wall. 



Approximate, situated close together, but not 

 united. 



Arcuate, curved like a bow. 



Articulation, the joint of a more or less segmented 

 structure . 



Assimilating filaments, filaments borne on the sur- 

 face, containing chlorophyll (and, usually, other 

 pigments) , and carrying on the process of photo- 

 synthesis, used especially in the Phaeophycese to 

 distinguish from superficial, colorless filaments. 



Attenuate, attenuated, narrow and tapering. 



Austral, southern, usually referring to the Southern 

 Hemisphere. 



Auxiliary cell, a cell in the Florideae receiving a 

 nucleus from the fertilized egg and, as a result of 

 this, forming reproductive spores. 



Axial, relating to the axis. 



Axil, the distal (more apical) angle between the 

 axis and an organ arising from it. 



Axillary, growing in an axil. 



Axis, te line running the length of a plant around 

 which the branches are borne. 

 548 



Biciliate, possessing two cilia. 



Bipartite, divided into two parts. 



Boreal, northern, usually referring to the Northern 



Hemisphere. 

 Brood bud, a specialized multicellular structure 



formed from a vegetative portion of a plant and 



serving for propagation. 



Caspitose, growing in tufts. 



Calcified, containing a deposit of lime. 



Callus, an abnormally thickened part, usually as a 

 result of a wound. 



Calyptra, a cap, used for the thickening of the outer 

 wall of the apical cell of some Myxophyceae. 



Calyptrate, bearing a calyptra. 



Capillary, slender, like a hair. 



Capitate, used in the Myxophyceae for the termina- 

 tion of a filament in a more or less globose head. 



Carpogenic branch, a short, specialized, usually 3 

 or 4 celled, filamentous branch, occurring in the 

 Florideae, often immersed in the thallus, and 

 bearing at its apex the female organ, carpogo- 

 nium. 



Carpogonium, the female organ of the Rhodophy- 

 ceae, consisting, in the Florideae, of a swollen 

 basal portion within which the egg is borne, and 

 ahairlike, apical prolongation, the trichogyne. 



Carpospore, a spore formed in the Rhodophycese 

 as a result of the fertilization of the carpogonium. 



Carpostome, the opening in the sterile jacket in- 

 closing the carpospores of many Florideae, 

 through which the carpospores are shed. 



Cartilaginous, hard and tough, having the texture 

 of cartilage. 



Caulescent, possessing a stalk. 



Cellulose, a carbohydrate forming the principal 

 constituent of young and unaltered cell walls; 

 e. g., in the cotton of commerce. 



Chlorophyll, the green coloring matter of 'plants. 



Chromatophore, a body within a plant cell special, 

 ized to contain pigment. 



Cilium (pi., cilia), a short, whiplike projection of 

 a motile cell by' means of which the cell propels 

 itself; a minute outgrowth from a plant. 



Clavate, club shaped, thickened toward the apex. 



Cla-viform, club shaped. 



cm., abbreviation for centimeter, about two-fifths 

 of an inch. 



