Excerpt from The Chinese Waterchestnut
In its general habit, Eleoch'aris dulcis resembles other species in this large genus of the sedge family (peraceae). Characteristic of the plant is its lack of leaves, their photosynthetic function having been transferred to the numerous upright tubular septate stems. Under cultivation these run from 3 to 5 feet tall.
Insignificant flowers are produced among tiny imbricated scales located at the tip of the stems (fig. Male and female flowers are produced but not concurrently. The female (pistillate) flowers appear first when the stem tips are 5 or 6 inches above the water level. Considerably later, after the stems have attained a height of about 24 inches, male (staminate) flowers appear in the same in florescences. Tiny seeds (actually achenes) are produced, but these are of no importance in the culture of the plant as a crop.
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