The Collaborative International Dictionary of English v.0.48:

Sea girdles \Sea" gir"dles\ (Bot.)
   A kind of kelp (Laminaria digitata) with palmately cleft
   fronds; -- called also sea wand, seaware, and tangle.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Seaware \Sea"ware`\, n. [Cf. AS. s[=ae]w[=a]r seaweed.] (Bot.)
   Seaweed; esp., coarse seaweed. See Ware, and Sea girdles.
   [1913 Webster]