. A text-book of elementary botany. Botany. 96 ELEMENTARY BOTANY. smaller flask-shaped bodies, called spermogonia (Fig. 121), containing hair-like filaments, which break up into exceed- ingly small bodies, called the spermatia. The exact function Spermogonia „ Spermogoma ^Ecidium. Jlcidmm Fig. 121. of these is not known. The Escidiospores germinate, and when on the proper host-plants the germ-tube grows through the stomates. A dense mycelium is then formed in the paren- chyma of the leaf; from this mycelium grow pedicelled spores, called uredospores. They form, when they burst through the epid
. A text-book of elementary botany. Botany. 96 ELEMENTARY BOTANY. smaller flask-shaped bodies, called spermogonia (Fig. 121), containing hair-like filaments, which break up into exceed- ingly small bodies, called the spermatia. The exact function Spermogonia „ Spermogoma ^Ecidium. Jlcidmm Fig. 121. of these is not known. The Escidiospores germinate, and when on the proper host-plants the germ-tube grows through the stomates. A dense mycelium is then formed in the paren- chyma of the leaf; from this mycelium grow pedicelled spores, called uredospores. They form, when they burst through the epidermis, orange-colored spots, called Red Rust. This stage was formerly designated as the genus Uredo (Fig. 122). The. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Kellerman, William Ashbrook, 1850-1908. Philadelphia, Eldredge & Brother
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