Morphology and specimen distribution of Clade 2 Russula hypofragilis (Woo sp. 28). BW followed by numerals designate Ben Woo samples. a Photo by B. Woo, BW920, scanned image from WTU. b Distribution of specimens of the Woo collections in Pacific Northwest. c–j Micromorphology, all 1000x magnification. c Spores in median optical section and surface view in Melzer’s reagent (c1–c2 BW519; c3–c4 BW519; c5–c6 BW548; c7–c8 BW814; c9–c10 BW649; c11–c12 BW649). d Hymenial cystidium (BW814). e, f Basidia (BW814, BW814). g–j Cap cuticle terminal cells with refringent contents (BW548, BW525, BW519, BW519). Scale bars 10 µm