. Elementary botany . Fig. 7- Thread of mucor, showing protoplasm and vacuoles. form and structure of the plant mucor is different from spiro- gyra, and the arrangement of the protoplasm within the plant is also quite different, the reactions when treated by certain re- agents are the same. We are justified then in concluding that the two plants possess in common a substance which we call protoplasm. Protoplasm in nitella. 17. One of the most interesting plants for the study of one remarkable peculiarity of protoplasm is Nitella* This plant belongs to a small group known as stoneworts. They po
. Elementary botany . Fig. 7- Thread of mucor, showing protoplasm and vacuoles. form and structure of the plant mucor is different from spiro- gyra, and the arrangement of the protoplasm within the plant is also quite different, the reactions when treated by certain re- agents are the same. We are justified then in concluding that the two plants possess in common a substance which we call protoplasm. Protoplasm in nitella. 17. One of the most interesting plants for the study of one remarkable peculiarity of protoplasm is Nitella* This plant belongs to a small group known as stoneworts. They possess chlorophyll, and, while they are still quite simple as compared with the higher plants, they are much higher in the scale than spirogyra or mucor. 18. Form of nitella —A common species of nitella is Nitella Jlexilis. It grows in quiet pools of water. The plant consists of a main axis, in the form of a cylinder. At quite regular intervals arc whorls of several smaller thread-like outgrowths, which, because of their position, are termed " leaves,1' though they are not true leaves. These arc branched in a characteristic fash- ion at the tip. The main axis also branches, these branches arising in the axil of a whorl, usually singly. The portions of the axis where the whorls arise are the nodes. Each node is made up of a number of small cells definitely arranged. The portion oi the axis between two adjacent whorls is an inter-
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisher, booksubjectbotany
