| 单词 | river lettuce |
| 释义 | > as lemmasriver lettuce river lettuce n. rare an aquatic plant, Pistia stratiotes (family Araceae), common in tropical rivers and streams; the water lettuce. ΚΠ 1897 M. Kingsley Trav. W. Afr. 378 Great floating masses of river lettuce (Pistia stratiotes). 1920 A. Arber Water Plants xvii. 213 In Africa, the River Lettuce, Pistia Stratiotes, plays a similar part to the Water Hyacinth of America in hindering navigation. < as lemmas |
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