300 BRITISH SEA-WEEDS. 



Cuticle, a fine membrane, usually transparent, which covers 

 the surface of a plant. 



Cylindrical, long and round, like a rod. 



Deciduous, falling off. 



Decumbent, leaning downwards. 



Decurrent, attached to the stem without a stalk, and ex- 

 tending along it. 



Denuded, laid bare. 



Depauperated, impoverished. 



Dichotomous, branched by repeated forkings. 



Digitate, finger-shaped. 



Dicecious, having male and female flowers on distinct plants. 



Dissepiment, an internal partition. 



Distichous, ranged in two opposite rows. 



Divaricate, growing in many different directions. 



Divergent, very open and spreading. 



lEcMnate, prickly, spined. 



Elliptic, about twice as long as broad, with rounded ends 

 equal to each other. 



Elongate, long and narrow. 



Endochrome, coloured matter contained in the cells of sea- 

 weeds, etc. 



Epidermis, the outer coating of cellular tissue. 



Esculent, eatable. 



Exotic, foreign, not native. 



Easciculate, growing together in a tuft. 



Eastigiate, level-topped — when the branches all point up-j, 

 wards, as in the Lombardy poplar. 



Favella, a globose cluster of spores. 



Favellidium, a cluster of two or more favellae. 



Fibril, a very delicate fibre. 



Fibrillose, covered with fibres. 



Fibrous, composed of fibres. 



Filamentous, composed of long, simple or branched threads. 



Filiform, formed like a thread. 



