Photo: © Steve Trudell
Hygrophorus eburneus group
(Fr.) Fr.

Pileus: 1.0 - 7 cm broad; broadly convex at first then planar to broadly umbonate and finally depressed; margins inrolled to incurved when young then finally straight to crenate when mature, at times exceeding lamellae; surface viscid to glutinous, at times with a zone of drying slime on margin edge or dry but shiny during dry weather, glabrous; pure white when young and mature, at times with yellow tones especially on disc; context 1- 2 cm at junction with stipe; white, moist and spongy especially during wet weather; taste indistinct; odour indistinct to ‘sickly sweet’.

Lamellae: Horizontal at first then becoming decurrent when mature; average to distant; thick and waxy; at times becoming intervenous towards margins; edges even; 3 mm broad; usually pure white but at times yellowish; lamellulae 1 - 3.

Stipe: 4 - 11 cm long X 0.6 - 1.2 cm wide at apex, 1.0 cm wide at base; equal to tapering downwards and flexuous; surface dry, pruinouse at apex glabrous elsewhere, silky fibrous; white at times with yellow at base; context solid, fragile and fibrous, white at times with yellow at base.

Microcharacteristics: Spore print white; spores 7 - 9 X 4 - 6 µm, smooth, ellipsoid, inamyloid.

Comments: Largent (1985) separates this species group into 9 different species based on the presence or absence of slime on the stipe and the colour of the cap and gills. The species with a dry stipe is the only one collected in these forests.

Further Reading:

Hesler, L.R. and A.H. Smith. 1963. North American species of Hygrophorus. Univ. Tennessee Press. Knoxville, Tn. pp 416.

Largent, D. 1985. The Agaricales (gilled fungi) of California. 5. Hygrophoraceae. Mad River Press. Eureka Ca. pp 208.