vasculum

from The Collaborative International Dictionary of English v.0.48

Vasculum \Vas"cu*lum\, n.; pl. {Vascula}. [L., a small vessel.]
   1. (Bot.) Same as {Ascidium}, n., 1.
      [1913 Webster]

   2. A tin box, commonly cylindrical or flattened, used in
      collecting plants.
      [1913 Webster]