οῦς, ἡ, Thallo, one of the Ὧραι, a divinity of increase, Jusj. ap. Lycurg.77, Paus.9.35.2.
Wikipedia EN
Thallo (Θαλλώ, literally "The one who brings blossoms"; or Flora for Romans) or Thalatte was the goddess of spring, buds and blooms, a protector of youth.