688 GLOSSARY 



Heteromorphic. Heteromorphous. Variation from normal structure, 

 as having organs differing in length; dimorphic. 



Hirtose. Hirtus. Hairy; hirsute. 



Hispid. Bristly. 



Hoary. Gray from fine pubescence. 



Host. A plant which nourishes a parasite. 



Hyaline. Colorless or translucent. 



Hyaloplasm. The hyaline matrix or clear non-granular portion of pro- 

 toplasm. 



Hymenium (a). An aggregation of spore mother-cells in a continuous 

 layer on a sporophore. 



Hymenophore. That part which bears the hymenium. 



Hypha (se). The thread-like vegetative part of a fungus. 



Hyphoid. Resembling hyphae. 



Hypertrophy. An abnormal enlargement of an organ. 



Hypophyllous. Situated under a leaf. 



Hypopodium (a). The stalk or support. 



Hypothallus. The marginal outgrowth of hjrphae often strand-like, 

 from the thallus. 



Hypothecium.. A layer of hyphal tissue immediately beneath the 

 hymenium. 



Hysterioid. Elongated boat-shaped, resembling the genus Hysterium. 



I, n, HI. Symbols for the stages of the rusts, see p. 324, 326. 



Imbricate. Overlapping as the tiles on a roof. 



Immersed. Below the surface. 



Imperforate. Without an opening. 



Incrassation. Thickened growth. 



Indehiscent. Not opening along regular lines. 



Indeterminate. Not terminated definitely. 



Indurate. Hardened. 



Infundibuliform. Shaped like a funnel. 



Innate. Born on the apex of the support. Imbedded. 



Intercalary. Growth which is not apical but between the apex and the 



Intercellular. Between cells. 



Intracellular. Inside a cell. 



Intramycelial. Within the mycelium. 



Involute. Enwrapped, having the edges of the leaves rolled inwards. 



Irpiciform. Having teeth resembling those in Irpex. 



