蟒草[Uwabamisō] Elatostema involucratum
蟒[Uwabami] : Giant serpent; heavy drinker
草[Sō] : Grass, herb
There are three words for "great serpent". Mizuchi(蛟), Orochi(大蛇, which is also read as daija) and Uwabami(蟒, 蟒蛇). Mizuchi is believed to be a spirit beast that lives in water and takes the form of a serpent, so this is a slightly different kind. Long long ago, giant serpents were called Orochi. As time went on, it came to be called as Uwabami.
The reason heavy drinkers are called Uwabami is that Uwabami swallows its prey whole and is said to snore when sleeping. And it is also said that its snoring sounds like the wind.
蝮の 鼾も合歓の 葉かげかな
[Uwabami no ibiki mo nemu no hakage kana] What sounded like a snoring of Uwabami is actually the wind rustling through the leaves of Nemu By 与謝 蕪村[Yosa Buson](Haiku poet, 1716-1783)
There is another possible interpretation of this haiku. 蝮 is normally read as mamushi(Gloydius blomhoffi) or kuchinawa. And, 合歓木[Nemunoki](Albizia julibrissin) means 眠りの木[Nemuri no ki](Tree of sleep). https://en.wikipedia.org/wiki/Mizuchi https://en.wikipedia.org/wiki/Yamata_no_Orochi
















