The Collaborative International Dictionary of English v.0.48:

Camphire \Cam"phire\ (k[a^]m"f[imac]r), n.
   An old spelling of Camphor.
   [1913 Webster]

Easton's 1897 Bible Dictionary:

Camphire
   (Heb. copher), mentioned in Cant. 1:14 (R.V., "henna-flowers");
   4:13 (R.V., "henna"), is the al-henna of the Arabs, a native of
   Egypt, producing clusters of small white and yellow odoriferous
   flowers, whence is made the Oleum Cyprineum. From its leaves is
   made the peculiar auburn dye with which Eastern women stain
   their nails and the palms of their hands. It is found only at
   Engedi, on the shore of the Dead Sea. It is known to botanists
   by the name Lawsonia alba or inermis, a kind of privet, which
   grows 6 or 8 feet high. The margin of the Authorized Version of
   the passages above referred to has "or cypress," not with
   reference to the conifer so called, but to the circumstance that
   one of the most highly appreciated species of this plant grew in
   the island of Cyprus.