Conifers are a diverse group of plants, but they have one thing in common: cones. On this Thursday, May 17 walking tour of the Arboretumâ€™s conifer collection with Arnoldia editor Nancy Rose, weâ€™ll take a close-up look at these surprisingly beautiful, seed-bearing structures. Weâ€™ll also discuss the landscape attributes of the conifers we visit, plus some easy identification tips. The tour will begin at the Bussey Street Gate at 1 pm.Â In case of inclement weather, contact 617.384.5209. Free, but registration requested at www.my.arboretum.harvard.edu.