1. Branching ventral and terminal, androecia on ventral, often reducedbranches; mature carpocephalum hemispherrical, rarely umbrell-shaped, shortlyto deeply lobed; stalk slender with scattered scales at least when young;pseudoperianth not constricted at base of lobes; spores brown or red-brown orpurplish … A. macropoda

1. Branching mostly terminal, androecia on main thallus behindcarpocephalum stalk, or antheridia on separate terminal branch, or dioicous;mature carpocephalum hemispherrical, to conical, almost unlobed; stalk stout,naked; pseudoperianth constricted at base of lobes; spores dark brown to black```… A. alpina