David Hammons’ untitled bottles from the mid-80s are a standout in Alexander Gray Associates’ summer group show, which features artists of color who have a relationship to the Hudson River Valley. Evoking messages cast adrift in bottles or carefully constructed ships in bottles, each curious form invites and eludes easy interpretation. A white lightning bolt suggests magically captured electricity, a fish somehow survives in a glass enclosure and the zippers from the flies of pants become living insects, a series of transformations that invite wonder. (On view through Aug 14th).