 The canyon slopes are characterized by chaparral on the south and chaparral and coastal sage scrub on the north to its mouth.Rice Canyon Creek is home to many Humboldt Lily plants that bloom near the creek in late June to early July at and above the narrows 3/4 of a mile above the mouth of the canyon.Papilio rutulus, Western Tiger Swallowtail, also found in the canyon are to be seen pollinating them.