~Clavaria argillacea~ (Persoon) Fries _Fruit-body_: height 20-60 mm. _Description_: Fruit-body: club-shaped, blunt or rounded at the apex, cylindrical or compressed and often grooved, yellow ochraceous or buff. Stem: distinct but short and yellowish. Flesh: yellowish. Spore-print: white. Spores: medium-sized, hyaline under the microscope, smooth and 10-11 × 5-6 µm in size. All these three species are typical of bare peaty soil, or moss covered peat amongst or around Heather or Ling (_Calluna vulgaris_) bushes. [Illustration: Plate 78. Moorland, moss-cushion and mountain fungi] (b) Mountain fungi and the so-called Basidiolichens ‘Basidiolichens.’ Plate 78. _Omphalina ericetorum_ (Fries) M. Lange has already been described (p. 232): it grows on acidic soils and ascends into mountain areas where it frequently grows on algal scum which accumulates around _Sphagnum_ plants. Under these conditions the algal cells enter the base of the fungus and grow in the cavity of the stem and amongst those hyphae which constitute the base. This association, however, appears to be much closer in the two lichens _Coriscium viride_ (Acharius) Vain and _Botrydina vulgaris_ Meneghini which have long been classified as species of lichen of unknown affinity because no perfect state was known. _Coriscium viride_ consists of blue-green overlapping plates or scales with narrow rounded often paler margins and which dry out greenish brownish grey. _Botrydina vulgaris_, in contrast, consists of dark green, gelatinous blobs drying out greenish brown.