Question

why is chara known as stonewort

Answer 1

as the group these plants are often stonewort what cause they may become incrusted with calcium carbonate "lime" making them rough and stiffer than other submerged plants

Answer 2

The algae Chara is called stonewort because its plant body is encrusted with calcium carbonate.

Explanation:

• Chara is a genus of charophyte green algae in the family Characeae.
• It is a submerged aquatic freshwater algae.
• It is a macroscopic, multi cellular, branched thalloid plant body.  
• It resembles the land plants because of its stem-like and leaf-like structure.
• The stem is actually a central stalk consisting of giant, multinucleated cells.
• Chara plants are rough to touch because of the presence of calcium carbonate (lime) on their cell wall.

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