CHAPTER III. — SPORES OF FUNGI. 



IOI 



others perform no such function and are therefore only simple pores or pits. The 

 position of the pores on the membrane is different in different species. The spores, 

 for instance, of Sordaria fimiseda, de Not. have at their apex a germ-pore which is 

 closed only by the outermost lamella of the membrane (Fig. 52). The germ-pores 

 of the uredospores which I have examined,' those of Puccinia for example and 

 Uromyces, are sharply defined round holes in the endosporium, and are closed by 

 the episporiuin on the outside ; those of the teleutospores of the same genera appear 

 to be pits in the episporium, which do not however extend into its outermost lamellae 

 and seem to be closed on the inner side by the unpierced endosporium. Some, perhaps 

 many, uredospores (those of Puccinia graminis for instance) show a pit at their point 

 of attachment which is of no service for germination (Fig. 51). The spores of some 

 Basidiomycetes, as Hymenogaster Klotzschii, are furnished with a pit at the same 



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Fig. 50. Chrysomyxa Rhododendri, 

 Basidium from an aecidium bearing a 

 chain of spores. For the explanation see 

 the accompanying text and on page 71. 

 Magn. 600 times. 



FIG. 51. Puccinia  gratnim's. Small portion 

 of a hymenium ; u uredospores with four germ- 

 pores in their aequator, t a pair of teleuto- 

 spores, the upper one with a germ-pore in 

 its apex. Magn. 390 times. 



place which seems to belong to the episporium. The majority of the spores of the 

 Basidiomycetes have no pit at this spot, but are prolonged into a small stalk which 

 Corda * mistook for a pit. This stalk, as far as I could ascertain in the large-spored 

 Corticium amorphum (see Fig. 30), is mainly a continuation or protuberance of the 

 endosporium, over which the episporium is not continued or is present only as a very 

 thin membrane ; the stalk itself shows a narrow lumen, or its membrane is thickened 

 to such an extent that the cavity has disappeared. There is no germ-pore in any of 

 these spores at the point of insertion. The spore of Coprinus has one germ-pore, 

 according to Brefeld 2 , in the apex. 



1 Anleitg. p. XXXII. 



' 2 Schimmelpilze, III. 



