Marasmius brunneolorobustus

Cap: 10 – 20 mm diameter; bluntly conical to convex; dry, sulcate with small umbo; dark blood red, purplish chestnut, dark brick, umber; umbo darker in most fruitbodies.

Stipe: tough, wiry; 50 – 60 × 0.8 – 1.5 mm; glossy black at base, dark red mid-section, to pinkish-fawn at apex; small, off-white, basal mycelial disc. 

Lamellae: cream; free to adnexed; moderately crowded, 21 – 30 gills, with occasional lamellulae; margin faintly coloured pink. 

Flesh: minimal. 

Spores: inamyloid; narrowly clavate and slightly curved; average 17.5 × 4.5 µm, Qav = 3.87, range (15.5 –) 16.5 – 18.5 × 4 – 4.5 µm; Qmin = 3.58, Qmax = 4.30. 

Basidia: (rare) 4-spored. 

Cheilocystidia: common clavate, and uncommon Siccus-type broom cells with mostly thickwalled setulae. 

Pileipellis: palisade of Siccus-type broom cells, with mostly thick-walled setulae. 

Substrate: usually twigs up to 25 mm, often solitary, but sometimes gregarious with fruitbodies of different ages. 

Habitat: rainforest and wet sclerophyll forest.

Ref: Qld Mycological Society   author Francis Guard