PYRONEMA 367 
tered by the wind. No sexual reproduction has been discovered 
in Peziza, but in Pyronema, a form similar to Peziza, sexual 
reproduction has been 
discovered and carefully 
followed. 
Pyronema. — In this 
form there are sex organs 
and the apothecium de- 
velops as a result of 
SP 
LP) fa 
fertilization (Fig. 318). 
The female sex organ Fic. 317. — A cluster of Cup Fungi, 
resembles that of the Pezizas. X 4 
simpler Red Algae, such . 
as Nemalion. It consists of a globular cell (oégonium) and an 
elongated tube-like cell (trichogyne or conjugating tube). The 
Fie. 318. — Sexual reproduction in Pyronema confluans. A, the sex organs 
at the time of fertilization, showing the antheridia (a) in contact and fusing 
with the trichogynes through which the sperms pass to the odgonia (0); B, de- 
velopment of apothecium, showing the oégonia developing ascogenous hyphae 
which are beginning to form asci at the ends of their branches, and the sterile 
hyphae (6) which grow up among the ascogenous hyphae and form a large 
part of the wall of the apothecium. Highly magnified. After Harper. 
antheridium is a somewhat club-shaped terminal cell which 
comes in contact with the tip of the trichogyne and fuses with 
it. Both odgonium and antheridium are multinucleate. The 
