West Rock is a prominent ridge with views of the ocean.  Made of dolerite, colloquially known as traprock, it harbors an interesting flora with southern affinity, as evidenced by the numerous species that are more common to the south of New England, such as post oak (Quercus stellata).  Historically the site was populated by eastern redbud (Cercis canadensis) and hairy lip fern (Cheilanthes lanosa).  West Rock is still home to a number of rare plants that are of regional conservation concern, including some recent discoveries.  This field excursion will explore the slopes and ridgeline of West Rock, identifying the components of the oak-hickory woodlands.  Be prepared for rough and uneven ground, and bring a lunch with plenty of water.