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. 
ruginous, 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. 
Antheridium (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 Pheophycez to 
distinguish from superficial, colorless filaments. 
Alttenuate, attenuated, narrow and tapering. 
Austral, southern, usually referring to the Southern 
Hemisphere. 
Auxiliary cell, a cell in the Floridee receiving a 
nucleus from the fertilized egg and, asa 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. 
Axts, the 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. 
Cespitose, growing in tufts. 
Calcified, containing a deposit of lime. 
Callus, an abnormally thickened part, usually asa 
result of a wound. 
Calyptra, a cap, used for the thickening of the outer 
wall of the apical cell of some Myxophycee. 
Calyptrate, bearing a calyptra. 
Capillary, slender, like a hair. 
Capitate, used in the Myxophycee 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 
Floridez, often immersed in the thallus, and 
bearing at its apex the female organ, carpogo- 
nium. 
Carpogonium, the female organ of the Rhodophy- 
cee, consisting, in the Floridez, of a swollen 
basal portion within which the egg is borne, and 
a hairlike, apical prolongation, the trichogyne. 
Carpospore, a spore formed in the Rhodophyceze 
as a result of the fertilization of the carpogonium. 
Carpostome, the opening in the sterile jacket in- 
closing the carpospores of many Floridee, 
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 (pl., 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. 
Claviform, club shaped. 
cm., abbreviation for centimeter, about two-fifths 
of an inch. 
