Scurvy Grass is commonly found growing in coastal areas and around salt marshes, as it is extremely tolerant of salt. Although it has very high levels of Vitamin C, it also contains tannins and butyl-mustard oil that give it a strong peppery taste that tortoises might not like. Because of the possible salt content of the plant, and the high tannin content, we would recommend that you only feed Scurvy Grass to you tortoise sparingly, if at all.
Young leaves of some species of Scurvy Grass can be confused with the leaves of Lesser Celandine, but that is a different plant and is toxic. Also do not confuse with Scurvy-grass sorrel (Oxalis enneaphylla) which is sometimes called Scurvygrass, but is no relation.