196 



Mycologia 



187. Rhizopogon maculatus Zeller & Dodge. 



In humus or clay soil, under Pseudotsuga taxifolia, Corvallis. Oc- 

 tober to January. Rare. Nos. 2015, 2228. 



This is the first report of this species outside of the type locality in 

 California. It differs from the type in its thicker peridium (200 /x in 

 places). The white outer layer of the duplex peridium is about 160 /x 

 thick where the two layers total 200 /jl. The outer layer varies in thick- 

 ness while the inner layer is quite consistently 40 fi. The outer peridium 

 is easily separable. The fibrils are almost white when fresh. The my- 

 celium in the soil is in very fine fibrils hardly large enough to designate 

 as rhizomorphs and gives to the soil a grayish-olive color. The fresh 

 fructifications are almost odorless. 



188. Rhizopogon roseolus (Corda) Zeller & Dodge. 



In humus soil, under Pseudotsuga taxifolia, Corvallis. November. 

 Not infrequent. Nos. 2132, 2141. The fructifications have a farinaceous 

 odor when young but when ageing they possess an extremely foul odor. 



189. Rhizopogon rubescens Tul. 



In wood rat diggings in leaf mould, under conifers, McMinnville and 

 Alsea. August and December. Not infrequent. Nos. 1962, 2170. 



190. Arcangeliella caudata Zeller & Dodge. 



On ground in leaf mould under Quercus Garyana, Corvallis. April. 

 Rare. No. 2005. There are no apparent differences between this col- 

 lection and the type collection from California. 



191. Gautieria morchelliformis Vitt. 



In humus under hazel, seven miles west of Alsea. August. Rare. 

 No. 1969. This collection differs from those previously examined in 

 that the columella is branched and reaches half way to the summit 

 of the fructification. The odor when fresh is strongly foetid. 



192. Gautieria Parksiana Zeller & Dodge, sp. nov. 



Fructifications gregarious, subglobose to irregular, 1-5 cm. in diam., 

 some specimens drying light ochraceous-buff to ochraceous-tawny, others 

 drying buckthorn-brown to mummy-brown ; rhizomorphs white, 1—2 mm. 

 in diam., usually branching from a distinct radicle; columella branched; 

 peridium persistent, 240—420 /un thick, stupose, of very fine hyphae ; gleba 

 drying ochraceous-tawny to Dresden-brown ; cavities 3-4 per mm., empty, 

 globose to irregular; septa 65-100^, thick, hyaline, of interwoven hyphae 

 generally extending longitudinally ; basidia clavate, arising from the 

 trama obliquely, usually 2-spored, 28-38 x 7-10 fx hyaline (Fig. 5-) ; sterig- 

 mata 5-14 jul long; spores ovate to citriform, buckthorn-brown in mass, 

 pale-olivaceous under microscope, with 9-1 1 (usually 10) rounded, longi- 

 tudinal ribs giving the appearance of striations, 7-11x14-19//., nucleus 

 equitorially placed (Figs. 5, 6). 



In soil under Heteromeles and Pseudotsuga. Oregon to California. 

 March to June. 



In a previous publications we tentatively included Chamonixia Rolland 

 in the genus Gautieria because in the early stages of the latter a peridium 

 is evident. At that time we had not had the opportunity to collect and 



8 Zeller, S. M., & Dodge, C. W. Gautieria in North America. Ann. Mo. 

 Bot. Gard. 5: 133-142. 1918. 



