, the Catalina ironwood, and L. floribundus ssp. asplenifolius , the island ironwood or Santa Cruz Island ironwood. These ironwoods are native only to the  Channel Islands  off southern California.  The island ironwood,  Lyonothamnus floribundus  ssp.  asplenifolius , is found on Santa Cruz, Santa Rosa and San Clemente Islands.  It has compound fern-like leaves,