A crustose species that has a yellowish green, leprose or farinose crust with a distinctive pale, cottony prothallus. The apothecia have a bright red disc and a sorediate margin that may be excluded.
Thallus: C-, K+ pale yellow, UV-. Apothecia: K+ purplish
In Scotland, Haematomma ochroleucum var. ochroleucum occurs on dry, siliceous or slightly calcareous rocks in upland and coastal areas. BLS distribution map
Haematoma ochroleucum var. ochroleucum is distinguished from Ophioparma ventosa on basis of its leprose or farinose crust.
scottishlichens.co.uk 