More like an herb. Coltsfoot (tussilago) is salty tasting when roasted and powdered. Glasswort (salicornia) is high in sodium and is used to make soda-based glass and soap. Also seaweeds like kelp.

Salicornia is a family of plants that grow in salt marshes or on beaches.

"Sal vegetal" is Spanish for "vegetable salt".

I'm just guessing here, but I'd expect it to be a (salty) seasoning derived from glasswort/samphire.

A number of species that grow on salt marshland are edile and salty to the taste. Batis Maritima (Saltwort, Beachwort or Pickleweed), Salicornia europae (Samphire, St Peter's Wort or Glasswort) and Salsola Soda (Agretti or Barilla Plant) are commonly used for culinary purposes.

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 2 words with the pattern -L---W--T. That is, nine letter words with 2nd letter L and 6th letter W and 9th letter T. In alphabetical order, they are:

bloodwort

glasswort

According to SOWPODS (the combination of Scrabble dictionaries used around the world) there are 5 words with the pattern G-A--W---. That is, nine letter words with 1st letter G and 3rd letter A and 6th letter W. In alphabetical order, they are:

glassware

glasswork

glassworm

glasswort

graveward