Elementary botany . Fig. 285. 248 MORPHOLOGY. materials are passed from the gametophyte to the sporogonium. The upperpart continues to grow, and finally the upper end differentiates into the maturecapsule. 523. Protonema of the moss.—When the spores of a moss germinate theyform a thread-like body, with chlorophyll. This thread becomes branched,and sometimes quite extended tangles of these threads are formed. This iscalled the protonema, that is first thread. The older threads become finallybrown, while the later ones are green. From this protonema at certainpoints buds appear which divide by c
Elementary botany . Fig. 285. 248 MORPHOLOGY. materials are passed from the gametophyte to the sporogonium. The upperpart continues to grow, and finally the upper end differentiates into the maturecapsule. 523. Protonema of the moss.—When the spores of a moss germinate theyform a thread-like body, with chlorophyll. This thread becomes branched,and sometimes quite extended tangles of these threads are formed. This iscalled the protonema, that is first thread. The older threads become finallybrown, while the later ones are green. From this protonema at certainpoints buds appear which divide by close oblique walls. From these budsthe leafy stem of the moss plant grows. Tiireads similar to these protonemalthreads now grow out from the leafy stem, to form the rhizoids. Thesesupply the moss plant with nutriment, and now the protonema usually dies,though in some few species it persists for long periods. Classification of the Mosses. CLASS MUSCINEJE (MUSCI). 524. Order Sphagnales *—This order includes the pe
Size: 902px × 2771px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthoratk, bookcentury1900, bookdecade1900, booksubjectbotany
