Cold resistance of plants of Vitex L. species in introduction conditions of M. M. Gryshko National Botanical Garden of the NAS of Ukraine Cold resistance of plants of Vitex L. species in introduction conditions of M.M. Gryshko National Botanical Garden of - Ya. Levchyk; D. H. Makarova; O. I. Kytaiev; V. A. Kryvoshapka; D. B. Rakhmetov (Plant introduction, 2014)