Glossary. 307 



Mycelhtui, the vegetative part of parasitic fungi, which consists of an 

 assemblage of hypha; or tubes containing protoplasm. 



Oblong, in the sense employed in the description of the spores of the 

 Uredineze, it means an oval body with very blunt ends, or an 

 oblong body with rounded angles. 



Obovate, the reverse of ovate, egg-shaped, with the base narrower than 

 the apex. 



Oval, a rounded figure with one diameter longer than the other, like 

 an oblique section of a cylinder ; almost synonymous with elliptical. 



Ovate, Ovoid, the shape of an egg — that is, oval, with the base some- 

 what broader than the apex. 



Papillate, covered with, or terminating in, a papilla. 



Paraphyses, barren hyphs, which may be filiform and dark-coloured or 



variously swollen and hyaline. 

 Parasite, zx^. organism that can exist only upon a living plant or animal, 



from which it takes its food. 

 Parenchyma, the cellular tissue of the host-plant. 

 Periblcm, in the sense used in the text, may be taken to mean that 



part of the root of the host-plant which lies beneath the cortex. 

 Peridium, the case or envelope that encloses the spores in some 



groups of fungi. 

 Perithcciwn, the flask-shaped receptacle which encloses the ascigerous 



fructification of the Sphasritc, etc. 

 Persistent, lasting, not soon falling ofif. 



Pollinodium, the cell which acts the part of the male organ and ferti- 

 lizes the carpogonium. ■ 

 Promycelial spore, a spore produced from a prom)celium. 

 Proinyceliinn, the germ-tube of a teleutospore, which is of limited 



length, and produces a few spores, unlike the teleutospore. 

 Protoplasm, the living contents of cells, or hypha;, consisting of 



albumenoid substances. 

 Pseudoperidium, the outer investing case of the scidiospores, composed 



of sterile cells. 

 Pseudospores, the barren spores which invest the fertile spores in 



Urocystis. The term has been applied by some authors to the 



uredospores and iecidiospores. 

 Pulverulent, dusty. 

 Pulvifiate, cushion-shaped. 

 Pyri/orm, pear-shaped. 



Receptacle, (i) in fungi, the structure which encloses the spores ; (2) in 

 flowering plants, that part of the flower-stalk to which the flowers 

 are attached. 



ReniJ'orni, kidney-shaped. 



