Pileus: 2 - 4 cm broad; when young convex to planar, developing a shallow to deep depression then finally deeply depressed and funnel shaped when mature; margins incurved when young, then decurved and finally uplifted, wavy, undulating and often cracking and eroded; surface dry to moist, with small dark brown scales or appressed fibrils when young, becoming glabrous when mature; when young yellowish to orange brown on disc becoming paler and pallid towards margins, when mature fading to pale to greyish orange on disc and pallid on margins and edges; context 3 - 8 mm at junction of stipe; firm, fleshy, moist, light golden to brown yellow unchanging when bruised; taste mild; odour indistinct.
Hymenium: As a series of ridges and folds, horizontal to subdecurrent at first, becoming strongly decurrent when mature; average to distantly spaced, forking repeatedly, with blunt edges, pale, reddish yellow when young, becoming light orange occasionally with lilac tints when mature.
Stipe: 4 - 7 cm long X 0.5 - 1.0 cm wide, equal to tapering downwards, often flattened or grooved, dry or moist, glabrous but with white mycelium at base; reddish yellow, to brownish orange; context solid, firm at first, then hollow with a thick rind when mature, unchanging when bruised.
Comments: This species is gregarious, fruiting abundantly on mostly decomposed or well decomposed coarse woody debris. This species was recently moved from the genus Cantharellus to Craterellus. The genera Cantharellus and Craterellus were previously separated by the presence or absence of clamp connections. However, molecular data indicates that Cr. tubaeformis is more aligned with other species of Craterellus than with other species in Cantharellus.
Dahlman, M., E. Danell and J.W. Spatafora. 2000. Molecular systematics of Craterellus: cladistic analysis of nuclear LSU rDNA sequence data. Mycol. Res. 104: 388-394.
Feibelman, T.P., R.L. Doudrick, W.G. Cibula and J.W. Bennett. 1997. Phylogenetic relationships within the Cantharellaceae inferred from sequence analysis of the nuclear large subunit rDNA. Mycol. Res. 101 (12)1423-1430.
Thiers, H.D. 1985. The Agaricales (gilled fungi) of California. 2. Cantharellaceae. Mad River Press, Eureka Ca. pp 34.