Botany for High Schools and Colleges (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1905 Excerpt: ...germination the ascospore commonly sends out a germinating tube, which is a growth from the endospore; it develops directly into a hypha, and becomes branched and septate. Bi-or multilocular ascospores usually send out a germi asci in various eruges; b the oldi-st,;, . f-.Kp frnm, .. Tn asciifino, more nwgnifled; c. an u-Hating IlII...... edLll CUI. in Ik frnm, .. edLll CUI. with vprv larcrp lrl eIJ IarSL spores--e.g., Megaloxpora, Pertuxaria, etc.--the germination takes place in a way somewhat different from that just described. In the endospore a great number of cavities or canals form (g. Fig. 205), from each of which there grows out a germinating tube (d, Fig. 205); these many tubes elongate into hyphae, and become septate and branched (/, Fig. 205). 397.--In addition to the apothecia, with their contained ascospores, there are other organs which contain bodies which are probably reproductive in their nature. The best known of these are the spermagonia (Fig. 202, A, s, and Fig. 206), which are small cavities, usually found upon the same thallus as the apothecia;, they contain branched threads (steriymata), wliicli line the inside of the wall (Fig. 202, D); upon the aterigmata are borne large numbers of minute cells (the sperniatia), which fall off and are permitted to escape through the small opening at the apex of the spermagonium. It is unknown whether these germinate or not; some botanists have supposed them to be sexual in their nature--hence their name, spermatia; the recent investigations of Stahl, to be referred to below, seem to iudi Fi-. 205.--Germination of the spores of lichens, a, ripe ascoepore of MtqalOfpora ajfliii; fy and c, successive plages of germination, see.n i...