When: 2007-09-07

Collection location: Sebastopol, Sonoma Co., California, USA [Click for map]

Who: Darvin DeShazer (darv)

No specimen available

Hypomyces on Boletus albidus, which is Observation 4047

The subiculum of Hypomyces microspermus and H. chrysospermus are both white and later become a variety of colors, including yellow. Aleuriospores for this collection are yellow, verrucose and 11-15 um. in diameter. (scale: each space is 3.76 um.)

According to Rogerson & Samuels, this is the most common Hypomyces in North America. It also has the widest range of Bolete hosts and only partially engulfs them leaving enough of the host intact for identification. H. chrysospermus has spores up to 25 um. and completely covers the host, making identification impossible.

Rogerson, T. Clark and Gary J. Samuels. 1989. Boleticolous Species of Hypomyces. Mycologia 81(3): 413-432.

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