Lepiota brunneoincarnata

Lepiota brunneoincarnata is a compact member of a difficult group of small dapperlings in which the cap breaks into concentric bands of brownish scales over a paler ground. The genus Lepiota sits in the Agaricaceae and is defined by free gills, a white spore print, a partial veil and the absence of a volva, and this species shows all of those features on a small scale.

Its diagnostic look is the colour of the scaling. Where many relatives are plain brown or reddish-brown, this species has a distinctly vinaceous or flesh-pink cast to the scales, described by the epithet, which combines brown and incarnate, meaning flesh-coloured. The scales are arranged in rough concentric rings around a darker, smoother disc, and the same pinkish-brown fibres form girdle-like bands on the lower stipe.

Unlike most woodland dapperlings this is largely a species of open, grassy, man-influenced ground, and it is commonest in warm-temperate and Mediterranean parts of Europe, extending north and appearing in urban parks, lawns and roadside plantings. It is one of a cluster of morphologically similar small Lepiota species that can be separated reliably only with attention to spore shape and the fine structure of the cap surface.

Cap

2-5 cm across, convex to bell-shaped when young, expanding to flat with a low broad hump. The disc stays smooth and dark, vinaceous-brown to greyish-brown, while the surrounding surface breaks into small flattened scales and patches of the same pinkish-brown to purplish-brown tone, arranged in concentric zones over a whitish to pale pinkish-cream fibrillose ground. The margin is even and not conspicuously fringed.

Gills

Free from the stipe, crowded, moderately broad, white to cream, sometimes with a faint pinkish or yellowish tinge in age. The edges are fine and even.

Stipe

2-5 cm long and 4-8 mm thick, whitish and smooth in the upper part, and below the veil zone covered in pinkish-brown to vinaceous fibrils that form irregular girdle-like bands. The ring is poorly formed and quickly lost, leaving at best a fuzzy, indistinct zone rather than a membrane. The base is only slightly swollen, with no rim, sac or volva, and often shows a pinkish tint.

Flesh & spore print

Flesh white, thin, sometimes flushing faintly pink in the stipe base, with a faint fruity odour. The spore print is white. Microscopically the spores are small, smooth and ellipsoid without a projecting spur, which separates this group from the boat-spored dapperlings such as Lepiota clypeolaria.

It grows on rich, often calcareous soil in open, disturbed and grassy places: lawns, park grass, roadside verges, gardens, hedge bottoms, orchards, the ground under planted ornamental trees, and dry grassy banks. It is much less a woodland species than most dapperlings and is frequently found in wholly urban settings.

The species is common through southern and central Europe, particularly around the Mediterranean, and occurs northward into temperate Europe as well as in parts of Asia; it has been recorded increasingly outside its historic range in association with planted trees and imported soil. Fruiting runs from summer into autumn, and fruit bodies appear singly, in small groups or in loose scattered troops in short grass.

This is a soil and litter saprotroph. Its mycelium lives in the humus layer of grassland and garden soil, decomposing fine plant debris, root fragments and organic matter and releasing nutrients back into the topsoil. It forms no mycorrhizal partnership, so its distribution reflects soil conditions rather than the presence of particular trees.

Its strong association with disturbed, nutrient-enriched, often calcareous ground places it among the fungi that have benefited from landscaping and urban planting. Warm summers followed by autumn rain suit it well, which is why it is a familiar sight in Mediterranean parks and appears in more northerly cities during warm seasons.

Lepiota subincarnata is extremely close, differing in being generally paler and pinker with finer, more evenly distributed scales, and in tending toward mulch and woodchip rather than short grass; reliable separation involves microscopy. Lepiota cristata is smaller and more slender with a white cap bearing sharply contrasting reddish-brown concentric scales, a distinct if small ring, a smooth white stipe and a strong sharp odour.

Lepiota clypeolaria is much larger and more slender with ochre-brown fibrous scales, a shaggy fringed cap margin and a woolly sheathed lower stem, and its spores are spurred rather than plain ellipsoid. Small Agaricus species can appear similar in stature but have gills that turn pink and then chocolate-brown and produce a dark brown spore print instead of a white one.