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half <br />life -size <br />life -size <br />seed, life -size <br />COONTAIL, Ceratophyllum demersum <br />(Ceratophyllum echinatum and submersum) <br />Fresh water, inland and coastal; Northwest Terri- <br />tories to Nova Scotia, California, and Florida. <br />Stems entirely under water; usually much - branched, <br />and sometimes stiff with a coating of lime. At each <br />joint is a whorl of leaves. Leaflets vary in length, <br />width, firmness, amount of forking, and prominence of <br />teeth. Flowers and seeds, at base of leaves, are <br />usually hard to find. The commonest form of seed is <br />pictured. Other forms have as many as a dozen spines. <br />55 <br />