. Elementary botany. Botany. 174 ArORPHOLOGY. 377. -Gracilaria is one of the marine forms, and one species is illustrated in fig. 185. It measures i5-20f)H or more long, and is pro- fusely branched in a palmate manner. The parts of the thallus are more or less llattened. The fruit is a cystocarp, which is characteristic of the Rhodophycece (Floride;e). In Gracilaria these fruit bodies occur scat- tered over tlic thallus. They are somewhat llask-shaped, are partly sunk in the thallus, and the ..onical end projects strongly above the surface. The carpospores are grouped in radiating
. Elementary botany. Botany. 174 ArORPHOLOGY. 377. -Gracilaria is one of the marine forms, and one species is illustrated in fig. 185. It measures i5-20f)H or more long, and is pro- fusely branched in a palmate manner. The parts of the thallus are more or less llattened. The fruit is a cystocarp, which is characteristic of the Rhodophycece (Floride;e). In Gracilaria these fruit bodies occur scat- tered over tlic thallus. They are somewhat llask-shaped, are partly sunk in the thallus, and the ..onical end projects strongly above the surface. The carpospores are grouped in radiating threads within the oval cavity of the cystocarp. These cystocarps are developed as a result of fertilization. Other plants bear gonidia in groups of four, the so-called tetraspores. 378. Rhabdonia.—This plant is about the same size as the gracilaria, though it possesses more filiform branches. The c}'stocarps form prom- inent elevations, while the carpospores lie in separated grou]>s around 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 Atkinson, George Francis, 1854-1918. New York : H. Holt
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