翻譯名義集 2.38

2.38

【漚鉢羅】亦云優鉢，亦云優波陀。此云黛色蓮華，又青蓮華，龍依此住，從池得名。

[Utpala] Also called Utpal, also called Upada. Translated here as dark-coloured lotus, and also blue lotus. Dragons dwell depending on this, and it is named after the lake.