marrubium vulgare white or common horehound ash green plant with small yellowish white flowers

andalusia background beauty bloom blossom botanical botany closeup cough europa flora flower flowers foliage forest fresh frost garden green grey herbaceous huelva inflorescence infusion lamiaceae leaf leaves macro meadow medicinal medicine mint nature outdoor perennial photography plant season spain spring springtime summer tratitional tree use white wild wildflower wrinkled yellowish