Denver Botanic Gardens, Sam Mitchel Herbarium of Fungi (DBG:DBG)
DBG-F-007054
445240bf-a692-4d6d-aff6-bf25a9dd607a
7054
Xerula americana Dörfelt
Physalacriaceae
paratype
Alexander H. Smith
1973-07-29
D. H. Mitchel
USA, Colorado, Pitkin , White River National Forest, Montezuma Road
39.0064 -106.8414
3658 meters
12000 FT
In litter under Aspen
Text, Number of specimens in set: 1, Associated Material: Photograph- Slide Attached to the data specimen card is a small sheet of paper containing spore measurements obtained by Orson K. Miller. Pileus: 1.5 - 4 cm broad companulate in youth expanding to plano - convex with obtuse (illegible) dark gray brown drying lighter - hygrophorous. Velvety tomentum giving silvery sheen. Margin straight even in button stage. Context: white firm, moist mild odor & taste 5 mm thick over disc. Lamellae: (Illegible) distant adnate to sinuate pure white 5 mm (illegible) wide, frequently branched & forked. Sl. waxy. Fibrous packed with white silky fibrous pith. Stipe: 5-7 cm x 3 -5 mm. (Illegible) upward & radicating downward to total of 15 cm in some. White above mouse grey brown below (illegible) with cap & with some velvety tomentum. Spores: elliptical, oval 11.2 - 12.4 x 6.2 - 7.4 microns. (Illegible) immature spores +/- dextranoid. Micro: basidia - clavate (34) 22-25 x 5.7 - 8.6 microns. 2 spored. Pleuocystidia - few - 45-60 (85) x 10-12 microns. Ten-pin shaped. Cheilocystidia present 40-50 x 10 microns - ten-pin (illegible). Cuticle: hymeniform - many hyphae projecting from edge which contains many swollen pear-shaped cells - 40-55 x 13 - 17 microns. Hair like cells 100-250 microns long x 4 microns at tip to 10-18 microns at bulb. Smooth hyaline thick walled but collapsing. Gill trama - interwoven. Clamps present but infrequent. See Xerula pudens in 'Nordic Macromycetes' Vol. 2. Card contains sketches. See images.