EXPLANATION OF SCIENTIFIC TERMS. 299 



Axial, appertaining to the axis. 



Axil, the angle formed by the union of the stem and branch, 



or of two branches. 

 Axillary, placed in the axils. 

 Axis, the central column of a cylindrical frond. 

 Basal, at or near the base. 

 Biennial, lasting two years. 

 Bifid, twice cut. 



Bipinnate, furnished with primary and secondary branchlets. 

 Branchlet, a small or secondary branch. 

 Byssoid, like the fibre of cotton, silk, or flax. 

 Calcareous, partially formed of chalk or lime. 

 Canaliculate, channelled, grooved. 

 Capsule, a spore-vessel. 

 Cartilage, gristle. 

 Cartilaginous, gristly. 

 Cellular, composed of cells. 

 Cellule, a small cell. 



Ciliate, fringed with hair-like processes. 

 Cilium, a hair-like process or fibril — literally an eyelash. 

 Claviform, club-shaped. 

 Compressed, slightly flattened. 

 Concentric, arranged round a common centre. 

 Conceptacle, an organ containing spores. 

 Confervoid, conferva-like. 

 Conical, shaped like a cone. 

 Convergent, tending towards the same point. 

 Constricted, drawn together, narrowed. 

 Convex, rising in a circular form. 

 Cordate, heart-shaped. 

 Coriaceous, leathery. 

 Corpuscle, a small body. 

 Cortical, belonging to the back. 

 Cruciate, in the form of a cross. 

 Crustaceous, crust-like, and coated with chalk or lime. 



