. Botany for high schools and colleges. Botany. 374 BOTANY. 366.âThe sexual organs consist, as in Coleochwte, of carpogonia and antheridia. The latter are composed of one â or more mother-cells, situated singly or in groups on the ends of branches {A and B, a, a, Fig. 185). The sperma- tozoids are small, round bodies, which are destitute of cilia, and, as a consequence, incapable of independent movement {A, X, Fig. 185) ; they are carried about by currents of ^ water, and in this way brought to the carpogonia. 367.âThe carpogonia are some- what yariable as to their complex- ity, being much mor
. Botany for high schools and colleges. Botany. 374 BOTANY. 366.âThe sexual organs consist, as in Coleochwte, of carpogonia and antheridia. The latter are composed of one â or more mother-cells, situated singly or in groups on the ends of branches {A and B, a, a, Fig. 185). The sperma- tozoids are small, round bodies, which are destitute of cilia, and, as a consequence, incapable of independent movement {A, X, Fig. 185) ; they are carried about by currents of ^ water, and in this way brought to the carpogonia. 367.âThe carpogonia are some- what yariable as to their complex- ity, being much more simple in the lower orders than in the high- er. In the genus Nemalion the car- pogonium consists of a single cell {B, I, Fig. 185), resembling Coleo- chmte closely in this respect. It is thickened below, and elongated above into the trichogyne, whicK diilers from that in Coleochmte in Fig. of Florid- ^ot being opcn at the top. When I. Sachs B,oi the spermatozoids are set free from C'oraffina o^inofis; (, tetraspores '- ⢠t , i li_ \ L^ in a cup-Bhaped extremity of a the antheridia they attach tnem- ranc .â er er ey. gelves to the trichogync, as shown in Fig. 185 ; the result of this contact of the spermatozoids with the trichogyne is the fertilization of the carpogonium, which immediately enlarges, and at the same time undergoes division into many cells, which grow into short, crowded branches, bearing a spore at the end of each {D and E, Fig. 185). To this growth, which includes the spores and the short branches which bear them, and which resulted from the fertilization of tlie carpogonium, the name of sporocarp is applied. In the genus under consideration the sporocarp is a comparatively simple growth, as compared with the degree of complexity it reaches in some other orders of this class. 368.âIn the genus Lejolisia, the carpogonium, before fertilization, consists of several cells {A, h, Fig. 185); the' trichogyne is in connecti
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectbotany, bookyear1888
