Cystangium idahoensis

SPECIES FACT SHEET Scientific Name: Cystangium idahoensis (Singer & A.H. Sm.) Trappe, T. Lebel & Castellano 2002 Order: Russulales Family: Russulaceae Conservation Rankings and Status: Global: G2G3 State: OR S1, WA Not ranked Oregon Biodiversity Information Center (ORBIC) List 1 (Ranks from ORBIC, http://orbic.pdx.edu accessed August 16, 2013) Type Locality: USA, Squaw Meadows, Valley County, Idaho. Collected by Smith 60161, 1958. Located at MICH herbarium (holotype). Original description in Singer, R. and A.H. Smith. 1960 as Martellia idahoensis. Studies of the genera of sequestrate russuloid fungi by Lebel and Trappe led to amended generic descriptions of Cystangium and elimination of the genus Martellia (Trappe et al., 2002). Technical Description: Sporocarp 8-40 mm broad, globose-depressed or irregular, irregularly ridged or grooved, , white when young Gleba loculate, white at first, in age pale brown. Odor none; Spores globose to broadly ellipsoid, 10-13 x 9-11.5 microns, amyloid, ornamentation echinate to verrucose, 1-1.5 microns tall, unconnected or anastomising to form compound warts, few lines or ridges This Cystangium is characterized by the relatively large, echinate to verrucose (small rounded warts) spores and the presence of macrocystidia. Life History: This taxon is hypogeous (grows underground) and a presumed ectomycorrhizal former. Sporocarps are formed below the soil surface and are associated with Pacific silver fir, subalpine fir, noble fir, Engleman spruce and mountain hemlock. Fruits August through October. It depends on mycophagy (consumption by animals) for spore dispersal. Range, Distribution, and Abundance: This species is very rare; globally only known from three locations in Oregon and Idaho, with two of the populations from the Northwest Forest Plan area in Oregon. Oregon: Lane Co., Lamb Butte Scenic Area, Ollallie Trail, Willamette National Forest; Benton Co., Marys Peak Campground, Siuslaw National Forest. FS/BLM lands in Oregon and Washington: Documented on the Willamette and Siuslaw NFs. 1

Habitat Associations: Populations are located in the Pacific silver fir, and western hemlock plant associations. Both are found in wetland types. Populations range from 2738-3455 feet in elevation and are found one each on north, south and east-facing slopes. Threats: Because the species is mycorrhizal any adverse impact to host trees or actions that would disturb the soil and duff in the vicinity of fruiting bodies could have an adverse effect on the species. Fire could be a potential harmful agent to Cystangium idahoensis because the plant associations in which it is found are subject to infrequent but stand-replacing wildfires. Conservation Considerations: Buffer known populations from management activities that include tree removal and soil compaction or disturbance. Consider buffering populations from prescribed burns. Other pertinent information (includes references to Survey Protocols, etc): The survey protocol for sensitive fungi is located on the ISSSSP website: http://www.fs.fed.us/r6/sfpnw/issssp/documents/inventories/inv-sp-fuver1-2008-12.pdf. The survey protocol for Survey and Manage fungi is located on the Survey and Manage website: http://www.blm.gov/or/plans/surveyandmanage/protocols/ David Aurora does not include this species in Mushrooms Demystified, although he treats other Martellia species on p. 742. Prepared by: Jenny Lippert, Willamette National Forest Date: March, 2013 Edited by: Rob Huff, BLM/FS Portland, Oregon Date: January, 2014

ATTACHMENTS: (1) References (2) Map of Species Distribution (3) Photographs of Species

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ATTACHMENT 1. References Castellano, M.A., J.E. Smith, T. O’Dell, E Cazares and S. Nugent. 1999. Handbook to the Strategy 1 Fungal Species in the Northwest Forest Plan, GTR476. USDA Forest Service, PNW Research Station, Corvallis. Castellano, M.A and T. O’Dell. 1997. Management Recommendations for survey and manage fungi. Version 2.0. Group 3: 1-20. Singer, R. and A.H. Smith. 1960. Mem. Torrey Bot Club 21(3): 1-122. Trappe, James M., Teresa Lebel & Michael A. Castellano. 2002. Nomenclatural revisions in the sequestrate russuloid genera. Mycotaxon 81: 195-214.

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ATTACHMENT 2. Map of Species Distribution in OR/WA

Map is missing site from the Siuslaw National Forest.

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ATTACHMENT 3: Photo of Cystangium idahoensis

From the MycoBank Website http://www.mycobank.org/MycoTaxo.aspx?Link=T&Rec=333814 The best photos are from the Handbook to Strategy 1 Species (Castellano, 1999) but are copy righted. Photos show the truffle with white-colored internal and external

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