Lewis & Short

1. hortensĭus, a, um, adj. [hortus], of or belonging to a garden, garden-.

  1. I. Adj.: bulbi, Plin. 20, 9, 40, § 105: batis, id. 26, 8, 50, § 82.
  2. II. Subst., in plur.: horten-sia, ōrum, n., garden-herbs, Plin. 19, 6, 31, § 98; 19, 8, 39, § 131; 26, 4, 10, § 22.