302 BRITISH SEA-WEEDS. 



Laciniate, jagged. 



Lamella, a thin plate. 



Lamina, the surface of a frond. 



Lanceolate, lance-shaped. 



Lateral, on the side. 



Lax, loose, not dense. 



Leaflet, a small leaf. 



Leathery, tough, flexible, rather thick. 



Ligulate, strap-shaped. 



Linear, long and narrow, with parallel sides. 



Lobe, a division of a flat frond. 



Lobule, a lesser division of a flat frond. 



Longitudinal, lengthwise. 



Lubricous, smooth, slippery. 



Matrix, the substance in which anything is developed or 



deposited. 

 Medullary, pith-like. 



Membranous, ~\ «, -, ,, ,,. 



__. _ ^soft, supple, rather thm. 



Membranaceous, J 



Midrib, the vein-like thickening running down the centre 



of a frond. 

 Moniliform, necklace-like. 

 Monoecious, having male and female flowers on the same 



plant. 



Mucilaginous, slimy. 



Mucilage,'] n ,. r .-, ,- 



> a gelatinous liquid or slime. 

 Mucus, J 



Multifld, many times cut or divided. 



Multipartite, many-parted, divided to the base. 



JSfemathecia, external wart-like excrescences. 



Nerves, fibres visible on the external surface of a frond. 



Node, the place where the joints or articulations of a stem 



meet. 



Nodose, knotted. 



Normal, ordinary condition. 



