BRIEF DESCRIPTION: The blushing of the cap in this species seems to be below the surface at first, and appears to the viewer as if seen through a thin layer of frosted glass.  For many years, this species was called "A. rubescens" in the western USA.  This species occurs with oaks from the Pacific Northwest (see photo of holotype, above) of the USA to southeastern Arizona (image of sectioned fruiting body, above).

(t.b.d.)

The spores measure (6.2-) 8.2 - 10.8 (-14.8) x (4.2-) 5.5 - 7.2 (-8.8) µm and are ellipsoid to elongate (rarely subglobose or cylindric) and amyloid.  Clamps are occasionally found at bases of basidia.

While a bulb on the stem is often apparent in young specimens, mature specimens often show little or no swelling at the base.

There is one collection probably identifiable as this species from central Mexico.  The species has been identified from the Canary Islands, Spain, growing with introduced trees.  A very similar mushroom occurs with conifers in Norway, and European illustrations purporting to show A. rubescens Pers. : Fr. sometimes show a mushroom appearing to be A. novinupta.  Studies on the white, rubescent European material are under way.  The present species is not to be confused with A. rubescens var. alba Coker, a gracile eastern US taxon that is slower to bruise and does not have the distinctive blushing of the pileus seen in A. novinupta.  For comparison with additional taxa see A. brunneolocularis Tulloss, Ovrebo & Halling; A. orsonii A. Kumar & T. N. Lakh.; and A. rubescens var. congolensis Beeli.

For distinguishing between rubescent taxa in section Validae, refer to the Key to rubescent taxa in Amanita sect. Validae. -- R. E. Tulloss & J. E. Lindgren