Glossary. 307 
Mycelium, the vegetative part of parasitic fungi, which consists of an 
assemblage of hyphe or tubes containing protoplasm. 
Oblong, in the sense employed in the description of the spores of the 
Uredinez, 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. 
Ovai, 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. 
Pafpillate, covered with, or terminating in, a papilla. 
Paraphyses, barren hyphz, which may be filiform and dark-coloured or 
variously swollen and hyaline. 
Parastte,an 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. 
Periblem, 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. 
Perithecium, the flask-shaped receptacle which encloses the ascigerous 
fructification of the Spheriz, etc. 
Persistent, lasting, not soon falling off. 
Pollino dium, the cell which acts the part of the male organ and ferti- 
lizes the carpogonium. 
Promycelial spore, a spore produced from a promycelium. 
Promycelium, 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 hyphz, consisting of 
albumenoid substances. 
Pseudoperidium, the outer investing case of the zecidiospores, 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 ecidiospores. 
Pulverutent, dusty. 
Pulvinate, cushion-shaped. 
Pyriform, pear-shaped. 
Receptacle, (1) in fungi, the structure which encloses the spores ; (2) in 
flowering plants, that part of the flower-stalk to which the flowers 
are attached. 
Rentform, kidney-shaped. 
