136 



Mycologia 



acerous wood but unrecorded on frondose. Exactly same as acerous form 

 (form with small pores). Spores globose, 5-6 mic, hyaline, transparent, often 

 guttulate. Setae are rare but large and same as those on acerous wood. 

 (Cfr. Syn. Fomes, p. 277.)" 



Fomes pinicola Swartz. on Larix occidentalis, Missoula, L. Lyallii, Ham- 

 ilton, Tsuga heterophylla, Troy, Picea Engelmanni, Libby, Pseudotsuga taxi- 

 folia, Missoula, Abies grandis, Darby, A. lasiocarpa, Libby, Pinus ponderosa, 

 Evaro, P. contorta, Anaconda, P. albicaulis, Hamilton, P. flexilis, Anaconda, 

 P. monticola, Troy, Betula occidentalis, Troy, Alnus tenuifolia, Libby. Occa- 

 sionally causes a heart rot in the living tree, ordinarily on fallen timber. 



Fomes pomaceus Pers. on Prunus Virginiana, Troy, P\ emarginata, Somers, 

 on domestic plums, Missoula. Causes a decay of the heartwood in living 

 trees. Remains living after the death of the host. 



Fomes put e arms Weir on Larix occidentalis, Troy, Picea Engelmanni, 

 Libby. A resupinate form also occurs. 



Fomes ribis Schum. on living Lonicera involucrata, Libby, Symphoricarpos 

 racemosus, Billings. The writer's specimens of Fomes Lonicera Weinm. and 

 F. Evonymi Kalch. collected in Europe can not be distinguished in their micro- 

 scopic details from F. ribis and should be here referred. Brenckle reports F. 

 ribis as common on Symphoricarpos in the Dakotas. 



Fomes roseus A. & S. on Pseudotsuga iaxifolia, Darby, Pinus contorta, 

 Boulder, Picea Engelmanni, Libby. 



Fomes scutellatus Schw. on Amelanchier alnifolia, Libby. 



Trametes 



Trametes carnea Nees on Pseudotsuga taxifolia, Missoula, Tsuga hetero- 

 phylla, Troy and Boulder, Pinus ponderosa, Ashland. Sporophores sometimes 

 remain living for more than one season and are then indistinctly stratified but 

 are quite distinct from Fomes roseus. A specimen on Pinus monticola, Troy, 

 has a surface of whitish appressed fibrils. This form has been distinguished 

 by the name Trametes arctic a Berk. (See Lloyd's Synopsis of the Genus 

 Fomes, page 225.) 



Trametes hispida Bagl. on Populus and Salix spp. throughout the state. 

 These specimens are in every way identical with material collected by the 

 writer on Fraxinus in Bavaria. A form with small pores common in Europe 

 is also occasionally found here. 



Trametes lacerata Lloyd on Alnus tenuifolia, Evaro, fide Lloyd. 



Trametes malic o la B. & C. on Populus tremuloides, Sioux National Forest. 



Trametes mollis Ft. on Betula occidentalis, Bearmouth, Populus tricho- 

 carpa, Libby. 



Trametes pargamenus Lloyd. Mr. Lloyd named this species from material 

 collected by the writer on living Populus trichocarpa, Darby. It " is a thick, 

 rigid plant, but in other features, context, violaceous pores, etc., is the same 

 species " as Polystictus pargamenus. (See Lloyd Letter.) 



Trametes protracta Fr. on Pinus monticola, Libby, P. contorta, DeBorgia. 

 This is a good species and should not be considered a poroid form of 

 Lenzites saepiaria. In its typical form the species is much larger than the 

 latter, sometimes 3 to 4 by 6 inches, smooth above and is usually found on 

 pines. 



