110 DIVISION I.—GENERAL MORPHOLOGY. 
the terminology here adopted. Secondly, the spore grows out into one or more 
tubular processes with the characteristics of hyphae, more rarely with those of the 
Sprouting Fungi. The two kinds aie naturally connected together by intermediate 
forms, and an instance of this has been already in effect given in Fig. 54. Other 
instances and some partial exceptions in the simplest of the Chytridieae will be 
described in different places in Chapter V. 
The modes of formation of sporangia in germination have been already 
considered in the foregoing sections; here, therefore, we have only the other 



FIG. 55. Puccinia graminis. A pair of tel i li and sporidia 2. B 
promycelium detached. C epidermis of the under surface of the leaf of ane vulgaris with a germinating 
sporidium, the germ-tube of which has p d into an epid cell. D uredosp putting out a germ-tube 


fourteen hours after being placed on the surface of ‘water ; four equatorial germ-pores are seen in the empty membrane 
ofthe spore. C, D magn. 390 times, 4, B more highly magnified. From Sachs’ Lehrbuch. 
mode to depict, which may be termed /ube-germination (Schlauchkeimung) and sprout- 
germination (Sprosskeimung). 
The characteristic feature in tube-germination is that the spore grows out 
at one or more than one spot in its surface into a tubular process which is of the 
nature of a fungal hypha. This the first product of germination is accordingly known 
as the germ-/ube(Keimschlauch). If the tube receives sufficient nourishment it developes 
directly in many cases into a mycelium or thallus like that of the parent, and it is there- 
fore the primordium of the mycelium (Fig. 55 D). In other cases its normal development 
