vasculum; botanical specimen case
A container used by botanists to collect and carry plant specimens in the field. A specialized term.
satchel; small leather bag
A small, often leather, shoulder bag or satchel. Less common than the botanical sense.
When going plant collecting, I take a vasculum.
An old leather satchel turned up among my grandfather's belongings.
The origin is uncertain, and the spelling 胴乱 is generally treated as phonetic ateji. It first denoted a small case or pouch worn at the waist and was later applied to a botanist’s specimen case.