CHAPTER V. — COMPARATIVE REVIEW ASCOMYCETES. — PYRONEMA. 209 



embraces its apex and presses its obtuse extremity firmly against it. When this has 

 taken place, seldom before, the tube is delimited by a firm transverse wall from the 

 inflated portion of the archicarp, and, as soon as the wall is formed, the membrane 

 in each of the connected organs is dissolved at the point of contact of the tube with 

 the antheridium, and the protoplasmic bodies of the two organs unite together through 

 a broad aperture (Fig. 97 B). The bent tube is therefore an organ which affects an 



Fig. 97. 



FIGS. 96 — 99. Pyronema. confluens, Tul. 



FIG. 96. Rosette of antheridia and archicarps on the mycelial filaments m ; ./first beginnings of the filaments of the envelope. 

 Magn. 190 times. 



FIG. 97. A a small rosette of incipient sporocarps ; c archicarps, a antheridia, t a trichogyne which has not yet entered into 

 union with a. B from an older rosette ; the trichogyne t proceeding from the archicarp c and cut off by a transverse wall is 

 in open communication with the antheridium a. C a pair of organs isolated, from a young sporocarp in about the same stage as 

 Fig. 98 ; a antheridium in communication through t with an archicarp c, which is much swollen and has put out branched 

 ascogenous hyphae from its surface. After Kihlman's preparations and drawings. Magn. about 300 times. 



FIG. 98. Young sporocarp in water showing through the cover-glass. The group of antheridia and archicarps is densely 

 overgrown by hyphae of the envelope which have formed erect paraph yses above ; the archicarps appear through the envelope-weft 

 as large vesicles. Magn. 90 times. 



FIG 99. Median longitudinal section through a sporocarp in the process of maturing. Archicarps and antheridia can no 

 longer be distinguished, and many asci have been formed between the paraphyses. (See Fig. 39.) Magn. about 45 times. 



union between the archicarp and the antheridium and, in accordance with the 

 terminology which is in use in other cases and which will be further considered below, 

 may be termed a trichogyne. Conjugation is followed by increase in size in the 

 archicarps, and by the formation of protuberances in a dozen or more places scattered 

 over the surface of each archicarp, which develope into thick short-celled ascogenous 

 hyphae (Fig. 97 C). Simultaneously with this, or even before it, copiously branched 

 [4] > 



