EXPLANATION OF TERMS. 



Abjection (Abschleud.eru.ng) of spores. 

 Throwing off with force of spores from 

 a sporophore. 



Abjoint. To joint off or delimit by septa. 



Abjunction (Abgliederung). Delimitation 

 by septa of portions of a growing hypha 

 as spores. 



Abscise. To cut off or detach by solu- 

 tion of a zone of connection. 



Abscision (Abschniirung) of spores. 

 Detachment of spores from a sporo- 

 phore by disappearance through dis- 

 organisation or otherwise of a connecting 

 zone. 



Accessory gonidia. In Mucorini : goni- 

 dial formations found in some species in 

 addition to the typical ones of the group. 



Actinomycosis. A disease in animals and 

 man characterised by the development 

 of tumours in the jaw-bone, vertebrae, 

 lymphatic glands and other places within 

 which sulphur-yellow bodies like sand- 

 grains occur, each consisting of an aggre- 

 gate of an organism, Actinomyces, which 

 is supposed to be a Fungus. 



Acrogenous. (a) Producing at the summit. 

 (b) Produced at the summit. 



Acrogonidium. Gonidium formed at the 

 summit of a gonidiophore. 



Acropetal. In the direction of the summit. 

 Comp. basipetal. 



Acroscopic. Looking towards the summit, 

 i. e. on the side towards the summit. 

 Comp. basiscopic. 



Acrospore. Spore formed at the summit 

 of a sporophore. 



Adventitious. Produced out of normal 

 and regular order. 



Aecidiospore. Spore formed in an ae- 

 cidium. 



Aecidium. In Uredineae : sporocarp 

 consisting of a cup-shaped envelope 

 (peridium) and a hymenium occupying 

 the bottom of the cup from the basidia 

 of which spores (aecidiospores) are 

 serially and successively abjointed. 



Aerobiotic. Organisms which require 

 for their vegetation a supply of free 

 oxygen are aeriobiotic. Comp. anaero- 

 biotic. 



Aethalium. In Myxomycetes : com- 

 pound sporiferous body formed from a 

 large combination of plasmodia. 



Algal layer. In heteromerous Lichens : 

 green band at the line of junction of the 

 rind and medulla of the thallus in which 

 the cells of the Alga of the Lichen are 

 aggregated. Same as algal zone, goni- 

 dial layer, gonimic layer, stratum 

 gonimon. 



Algal zone. Same as algal layer. 



Alveolate. Pitted so as to resemble honey- 

 comb. 



Amoeboid. Like an amoeba, i. e. a small 

 portion of protoplasm exhibiting creeping 

 movement by putting out and drawing in 

 pseudopodia. 



Amylogenesis. Formation of starch. 



Amylum-grain. Starch grain. 



Analogous. Having the same function. 

 Comp. homologous. 



Androgynous. Having male and female 

 sexual organs developed on the same 

 branch of the thallus. Comp. diclinous. 



Androspore. Male spore, i. e. spore which 

 on germination produces a body bearing 

 a male sexual organ. 



Anaerobiotic. Organisms which can 

 vegetate without a supply of free oxygen 

 are anaerobiotic. Comp. aerobiotic. 



Angiocarpous. Having a hymenium 

 developed by internal differentiation 

 within the sporophore and from the 

 first covered by a special envelope. 

 Comp. gymnocarpous. 



Annulus. In Hymenomycetes : portion of 

 ruptured marginal veil or of tissue of the 

 stipeforming a collar or frill or sheath upon 

 the stipe after the expansion of the pileus. 

 Frequently used to designate the special 

 form distinguished as annulus inferus. 

 Same as ring. 



