What structural characteristic distinguishes purple morning glory (rau muong tia) suited for aquatic growth?
Answer
Thicker, reddish stems and a crunchier texture
The purple morning glory, *rau muong tia*, exhibits distinct morphological traits suitable for its preferred environment in aquatic settings like ponds and wet fields. Unlike the white variety, it develops thicker stems that possess a reddish hue and maintain a noticeably crunchier texture even after cooking. This robustness allows it to better withstand longer cooking times or immersion in liquids, making it the preferred choice for incorporation into soups and hotpots where structural integrity during prolonged heating is necessary.
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