hulsea: small genus of erect balsam-scented herbs; Pacific coast of the northwestern United States
asterid dicot genus: genus of more or less advanced dicotyledonous herbs and some trees and shrubs
heliopause: the boundary marking the edge of the sun's influence; the boundary (roughly 100 AU from the sun) between the interplanetary medium and the interstellar medium; where the solar wind from the sun and the radiation from other stars meet