Cladonia rangiformis Hoffm. var. rangiformis
Primary thallus made of small basal squamules, rare, vanishing soon and sometimes absent, upper surface grey-greenish, whitish below. Podetia forming tufts up to 5-7 cm tall, often isolate, hemispherical, hedgehog-like, densely branched with acute angles, terminal ramification mainly bifid, sometimes trifid, pointed apices, turning brown to purplish-brown, surface typically marbled with grey-green to green spots on pale grey-cream background (snake skin or giraffe skin like (particularly visible in dry weather)), possibly squamulose. Apothecia very rare, small like pin's head, corymbose at branchlet apices, brown. Photobiont : trebouxioide. C-, K+ yellow, Pd+ red (30 %) or Pd- (70 %) according to the british authors, or K- and P- or K- and P + yellow slowly turning to orange-red according to the Nordic authors, sweet taste. Coastal species (in Brittany), on calcified dunes, seldom inland. Specimen exposed to sun turning brown may not be confused with Cladonia furcata, P+ red, darker, less marbled and bitter and for the small bush forms to Cladonia uncialis subsp. uncialis whose axils are open. N.B. Probably collective species from which it is possible to separate several taxa: chemoforms, ecoforms, variety,..
We have isolated the dense bush form coming on very windy and very sunny mineral soils at the foot of the rocks by the sea:
Cladonia rangiformis forme des landes aérohalines. Frequent in "hedgehog-like" at the top of cliffs by the sea.
Cladonia rangiformis var. rangiformis forma.. A form of suffering that turns brown in old age, the podetions of which are covered with small whitish growths, coming in very exposed places and receiving sea spray and splashes of seawater.
and the variety (single form):
Cladonia rangiformis var. pungens more thermophilic and less coastal whose podetia often have small foliaceous scales and whose ends are slender and more tapering.