sessile (figs. 281, 282). They may 
then have a similar position to 
that of the sporangia. There is, 
however, no reason to consider 
them as transformed sporangia, 
(comp. SCHILLER 1913, p. 12), as 
Fig. 282. 
Seirospora  Griffith- 
siana. Branch with 
tuft of paraspores and 
disporangium. 200: 1. 
it is only ex- 
ceptionally that 
they have the 
same place as 
the sporangia. 
At maturity 
the paraspore 
escapes from 
the thick envel- 
ope and takes 
a spherical 
shape. I have 
Seirospora Griffithsiana. 
Fig. 281. 
A, lateral tuft of paraspores. B, the lower- 
most cells in the lateral branches of the tuft are sterile. 200 : 1. 
not ascertained 
whether the paraspore is naked 
or provided with a thin mem- 
brane as asserted by SCHILLER 
(1913 p. 2%). According to this 
author the germination takes 
place without formation of a 
rhizoid; but that is not in 
accordance with my observa- 
tions. In my cultures the 
spherical paraspores had after 
two days given rise to a rhi- 
zoid, and some of these were 
divided by a transversal wall perpendicular to 
the rhizoid. At the opposite pole a shoot arose 
during the following days which soon began to 
branch in the usual way (fig. 283). In the same 
culture were found short shoots detached from 
the plant from which the paraspores were given 
off; these shoots had also germinated, long rhi- 
zoids having arisen from their basal end. 
1 6 
Doch wird der natürlich schon mit einem zarten 
Hautchen umgebene Inhalt nicht yon der Hiille zur 
Gänze frei”, 
Fig. 283. 
Seirospora Griffithsiana. Sporelings arising from 
paraspores. A, two days old, the others some days 
older. 120 : 1. 
45* 
