250 



GLOSSARY. 



decumbent, like one of the leafy 

 lichens (as Peltidea). 



Linear: long and narrow/with pa- 

 rallel sides. 



Lobe: one of the portions of a 

 deeply cut frond. 



Lobule : a diminution of lobe. 



Matrix : that from which something 

 else is formed or developed. 



Membranaceous : thin and filmy ; 

 also (when applied to substance), 

 soft and tender, but not gelati- 

 nous. 



Metamorphosed : changed in ap- 

 pearance, or converted to another 

 purpose. 



Mitriform, : shaped like a bishop's 

 mitre, or like a loaf of sugar. 



Moniliform : like a string of beads. 



Monoecious : having stamens and 

 pistils (or antheridia and spores) 

 on the same root, but not in the 

 same flower or conceptacle. 



Mucronate : having a small pro- 

 jecting point, or mucro. 



Mucus : organic gelatine or slime. 



Nemathecium : a wart-like protu- 

 berance composed of vertical fila- 

 ments closely packed together. 



Node : a joint or interruption in a 

 stem. 



Nodose : with swollen joints. 



Normal : regular, orderly. 



Ob : used as a prefix to a word, 

 mean, contrary wise ; as ob-ovate, 

 the reverse of ovate, &c. 



Oblong: broadly linear. 



Oa*ue . } thereverse of transparent. 



Orbicular: circular, round. 



Order : a group of plants consisting 

 of numerous Genera ; the next 

 division under a Class. 



Ovate : broad at one end and nar- 

 rowed towards the other, like the 

 outline of an egg. 



Palmate : divided, like a hand, into 

 several finger-like lobes. 



Papillated : covered with little nip- 

 ple or wart-like prominences, call- 

 ed papillae. 



Paranemata : filaments which ac- 



company spores in the fructifica- 



tion of many Algae. (See page 9). 

 Paraphyses : distended paranemata ; 



also applied to abortive spores. 

 Parasitic : growing on another 



plant, and subsisting on nourish- 



ment derived from it. 

 Parietal : attached to the wall or 



lining of a cell or conceptacle. 

 Patent : spreading, open. 

 Pectinated : arranged as the teeth 



of a comb. 



Pelagic : growing in many distant 



parts of the ocean, widely dis- 



persed. 

 Penninerved (leaf or frond) : when 



the nerves are placed at each side 



of the midrib like the plumes of 



a feather. 

 Percurrent: running through from 



top to bottom. 

 Pericarp : the seed-vessel, or case 



in which spores are lodged, or the 



walls of the same. 

 Peripherie : belonging to the outer 



stratum or periphery. 

 Periphery : the circumference, or 



outer stratum of cells in a cylin- 



drical frond. 

 Perispore : the case or skin which 



surrounds the spore. 

 Phyllodium : a flattened, leaf-like 



portion of the frond. 

 Pinna : one of a series of opposite 



or alternate, distichous branchlets. 

 Pinnule : a secondary pinna. 

 Pinnated : furnished with distichous 



leaves or branchlets, ranged like 



the plumes of a feather. 

 Pinnatiftd : deeply incised in a se- 



mipinnate manner. 

 Placenta : the part to which the 



spores are attached. 

 Plumule : a pinnated branchlet. 

 Polygonal: having many angles. 

 Polyhedral : having many sides. 

 Polymorphous : assuming many 



shapes. 

 Process : any prominence or pro- 



jecting part, or small lobe. 



