P. bifurcatispina is endemic to the Reserva Los Cedros, where it forms dense groups terrestrially or semi-epiphytically, with branched stems. At first glance, it resembles to P. dolichopetala, but it differs in the floral bracts, which have margins strongly armed with spines, many of which are bifuricate. Bifurcate spines are two spines that grow together at the same time and divide into two or more equal branches. The floral bracts do not reach the center of the the sepals (versus longer than the mid-length of the sepals). The sepals are smaller in size 43 mm long (versus 57-68 mm long): The petals are 77 mm long, with a slightly denticulate apex (versus 80-90 mm long and entire). The petals have a bifurcated appendage at the base 4-5 mm long (versus two small appendages at the base).
In agreement with the description of P. dolichopetala by Smith (1974), the coloration of the floral bracts is crimson and the petals orange. The new species, P. bifurcatispina has green floral bracts and sepals, with yellow flowers. —SeeManzanares 2005
