114 DIVISION I.—GENERAL MORPHOLOGY. 
In compound spores each merispore germinates in the same way as a simple 
spore or has the power of doing so (see Fig. 59 C). It is not uncommon to see 
a germ-tube proceeding from almost every merispore, even where they are many in 
number, as in Pleospora herbarum and Cucurbitaria Laburni. Sometimes certain 
merispores only germinate as a rule, and if the cells are arranged in a simple row 
his is usually the case with one or both the terminal cells of the row, as in Melogramma 
. Bulliardii, Tul., Melanconis, 
Tul., Aglaospora profusa, Not., 
Exosporium Tiliae and the 
stylospores of Cucurbitaria 
macrospora. The merispores 
which do not germinate gra- 
dually give up their contents 
to those which do}, that is, 
their contents disappear and 
are replaced by water in pro- 
portion as the germ-shoots 
develope. But theirmembranes 
remain uninjured, suffering no 
perceptible perforations. 
The sprout germina- 
tion occurs in single genera 
and species, as Saccharomyces ? 
Exoascus*, Dothidea Ribesia, 
Fr.*, and some species of Nec- 
tria®, not to speak of certain 
doubtful forms like Dematium 
pullulans which will be de- 
scribed further on. Small pro- 
cesses with a very narrow base 
“sprout, likecommencing germ- 
tubes, from the surface of the 
germinating on a moist slide after long lying in glycerine. B Pertusaria ejopiaca, SPOTe, then generally assume 
a ein boa ee um elongated or eylindrical 
form, and finally are abjointed 
in the manner described above in the case of the sprouting Fungi. A second 
and third or more sprouts may follow the first from the same point in the spore, 
till its protoplasm is exhausted. The sprouts may be formed at any point in the 
spore (Exoascus, Dothidea) or at fixed points, as at the two extremities of the 
fusiform dimerous compound spore of Nectria inaurata, or on the whole surface 
of the spore which is thus thickly covered over with sprouts which stand out from 

FIG. 59. A Pertusaria is. Optical longitudinal section of a spore 


1 Tulasne, Carp. II, and I, p.95. See also Cornu in Comptes rend. 84 (1877), p. 132. 
? Reess, Unters. ii. d. Alkoholgährungspilze, Leipzig, 1870. 
3 De Bary, Beitr. I.—Tulasne in Ann. d. sc. nat. ser. 5, V. See also section LXXVII. 
* Tulasne, Carp. II. t. IX. : 
5 Janowitsch in Bot. Ztg. 1865. 
