What is "gladen"

Gladen \Gla"den\, n. [AS. gl[ae]dene, cf. L. gladius a sword. Cf. Gladiole.] (Bot.) Sword grass; any plant with sword-shaped leaves, especially the European Iris f[oe]tidissima. [Written also gladwyn, gladdon, and glader.]

Etymology 1 alt. 1 sword grass. 2 Any plant with sword-shaped leaf, especially (taxlink Iris foetidissima species noshow=1). n. 1 sword grass. 2 Any plant with sword-shaped leaf, especially (taxlink Iris foetidissima species noshow=1). Etymology 2

vb. (obsolete form of gladden English)