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The asexual cells are termed tetraspores on account of the usual occurrence of four in each sporangium.
2
The outer walls of the sporangium now become hard, and the whole falls off as a seed.
3
Aplanospores would seem to represent zoospores arrested in their development; without reaching the stage of motility, they germinate within the sporangium.
4
The spores are formed in a manner very similar to those of the mosses, and are set free by rupture of the sporangium.
5
From each locule of a plurilocular sporangium there is set free an oosphere, which, being furnished with a pair of cilia, swarms for a time.
1
The frondlets have their points turned down to form sporecases.
2
On the return of moisture, the sporecases softened, become mucilaginous, and discharge their contents to form a fresh crop of plants.
3
After the water dries up, the plants die, and leave the sporecases on, in many instances quite covering the surface of the dried mud.
Usage of spore sac in anglès
1
It is hypothesized that autogamy occurs during the initial formation of the sporesac and that allogamy is also possible during this time.
2
Single celled, presaccular stages form aggregates within the metacoel of this host which resolve into sporesacs.
3
Ascomycetes, or " Sporesac fungi," where the spores are produced in delicate sacs called asci.
4
( Sporesac fungi or Ascomycetes.)
5
(The genera described under Section B. all belong to the order of Discomycetes, fungi that have the sporesacs collected in a flattened disc.)