GLOSSARY 



355 



Intralamellar Ti;isujs — same as 



trama in Hymenomycetes. 

 Isogamy — conjunction of two gametes 



of similar form. 

 Isosporojis — same as Homosporous. 



Lactiferous, Latigiferous — Leaving 

 or conveying latex, or milky lluitl. 



Lamella — in Hymenomycetes, the gills 

 or folds of the hymenium, radiating 

 from a definite point. 



Lipoxenous — applied to a jiarasite 

 which leaves its host and completes 

 its development independently. 



Macrogox^ihillv, Megalogoxidium — 

 large gonidium compared with others 

 produced by the same plant. 



Merispore — segment of a sjioridesm. 



Metaecious — same as Heteroecious. 



Microcyst — in Myxomycetes, applied to 

 a resting state of swarm-cells. 



Microgonidium — small gonidium com- 

 pared with others in the same species. 

 See Macrogonidium. 



MuUilocular spore — see Sporidesm. 



Mutualisjii — symbiosis of two organ- 

 isms living together and mutually 

 helping and supporting each other. 



Mycelium — vegetative portion of Fungi 

 composed of one or more hyphae. 



Neck, or collum — conical or cylin- 

 drical prolongation of the apex of 

 perithecium in Pyrenomycetes. 



OiDiUM — a generic term, sometimes 

 applied to concatenate conidia, which 

 are successively abstricted at the apex 

 of hyphae. 



Oogamy — conjugation of two gametes 

 of different form. 



Oogonium — female sexual organ, usu- 

 ally a spherical sac containing one 

 or more oospheres. 



Oospherc — spherical body which de- 

 velops the oospore as the result of 

 fertilisation. 



Oospore — product of fertilisation in 

 oosphere. 



Ostiolum — in Pyrenomycetes, orifice or 

 mouth of perithecium, or pyrenocarp 

 through which the spores are dis- 

 charged. 



Paraphvsis— sterile, thread-like hy- 

 phal branch accompanying the 

 mother-cells in a hymenium. 



Parasite — organism living in or upon, 



and at the expense of, anotlier. 

 Pathogen o us — producing disease. 

 Pcnicillate — like a pencil of hairs. 

 Pcridlolum — little lenticular bodies in 

 Nidularieae, which are free, or at- 

 tached by a funiculum to the inner 

 wall of the jjeridium. Each peri- 

 diolum enclosing a mass of spores. 

 Peridiuvi — the enveloping coat of a 

 sporophore, or receptacle in which 

 the spores are developed in a closed 

 cavity. In Gastromycetes sometimes 

 called the uterus, the contents being 

 the gleba. 

 Perithecium, or Pyrenocarp — ascocarp 

 with the margin incurved so as to 

 form a narrow-mouthed cavity. A 

 more or less globose receptacle, per- 

 forated at the apex. 

 Pilcus — in Hymenomycetes, the conical 

 or dome -shaped cap bearing the 

 hymenium on the under surface. 

 Extended also to other compound 

 sporophores. 

 Plasmatoparous — in Peronosporeae, 

 when in germination the protoplasm 

 of a gonidium issues as a spherical 

 mass, which becomes invested with a 

 membrane and projects a germ-tube. 

 Plasmodium — in Myxomycetes, the 

 multinucleate ]>rotoplasm, exhibiting 

 amoeboid motion. 

 Pleomorphism — when more than one 

 independent form in the life-cycle of 

 a species occurs it is called pleo- 

 morphy. 

 Pleicroblastic — in Peronosporeae, those 

 forms which produce vesicular lateral 

 outgrowths that serve as haustoria. 

 Pore — in Pyrenomycetes it is the ostio- 

 lum ; in Polyporei the mouth of the 

 tube which encloses the hymenium. 

 Promycelium — the product of tube 

 germination of a spore which con- 

 stricts off a number of spores, unlike 

 the mother spore, and then dies. 

 Psrudoperidium — the cup, or recep- 

 tacle, in Aecidium. 

 Pscitdopodium — in Myxomycetes, the 

 protruded and I'etracted protoplasm 

 of amoeboid forms, imparting motion. 

 Pycnidium — in Ascomycetes, a cavity 

 resembling a perithecium containing 

 gonidia, which are termed pycno- 

 gonidia. 



Receptacle — general term for hol- 

 lowed -out body, containing otlier 

 bodies. 



