244 Illinois State Laboratory of Natural History. 
Grumulose, like clustered grains. 
Host, the supporting plant, that upon which a parasite lives. 
Hyaline, glass-like, transparent. 
Hymenium, fruit producing surface. 
Hypha (pl. hyphx), a filament of afungus. The vegetative hyphz taken 
in quantity are-called the mycelium. 
Hypogenous, produced below. 
Hypophyllous, growing from the under side of leaves. 
Innate, growing inside or inclosed. 
Laciniate, cut-fringed. 
Lutescent, pale yellow. 
Mucronate, abruptly pointed with a spine. 
‘Mycelium, the vegetative filaments of fungi. 
Nuclear, pertaining to a nucleus. 
Nucleus, a differentiated portion of the protoplasm of a cell. 
Pallescent, approaching pallid. 
Pallid, of a pale undecided color. 
Papilla, a small obtuse protuberance. 
Papillate, covered with papillee. 
Paraphyses, sterile elongated organs bordering a sorus, or distributed 
among the spores. 
Parasite, one living upon and drawing its sustenance from another. 
Parasitic, having the characteristics of a parasite. 
Parenchyma, a tissue of thin walled cells, mostly somewhat spherical. 
Parenchymatous, composed of parenchyma. 
Pathogenic, disease producing. 
Pedicel, ‘a foot stalk, the stem of a spore. 
Peduncle, a stalk, sometimes used for the stem of a spore, but more com- 
monly as the main stalk of a flower or flower cluster. 
Peridium, a wrapper or covering. The membranous vessel inclosing the 
spores in Acidium is usually called a pseudoperidium, but for 
brevity the former is sometimes used. 
Pilose, thinly covered with hairs which are long and weak. 
Promycelium, the germinal filament of a teleutospore upon which spor- 
idia are borne. 
Pseudoperidium, a false peridium, the cup of cidium. 
Pseudopodia, false feet. 
Pulverulent, powdery, covered with dust. 
Pulvinate, cushion-like. 
Punctate, dotted. 
Recurved, bent backwards or outwards. 
Reflexed, bent abruptly backwards or outwards. 
Reticulately, in a net-like manner. 
Rufous, red-brown. 
Saprophyte, a plant living on dead organic matter. 
Septate, divided by one or more partitions. 
Septum (pl. septa), a partition wall. 
