260 SECTION HYGROPHORUS 



Peck (type, from Bolton, Sept., as H. glutinosus Pk. ). north Carolina: 

 Coker 932, 3771, 4993. Oregon: Syse 709. Tennessee: Hesler 19398. 



Observations — The type (labeled H. glutinosus) has been stud- 

 ied, and observations have been recorded as follows: Spores 8-10 ( 12.5) 

 X 5-6 /x, ellipsoid, slightly inequilateral, smooth, pale yellowish in Mel- 

 zer's reagent. Basidia 43-55 X 6-7 fx, 2- and 4-spored, the 4-spored type 

 predominant. Pleurocystidia and cheilocystidia none. Gill trama diver- 

 gent, the hyphae 3-6 /x broad. Cuticle of gelatinous hvphae (see 

 above). Clamp connections present. 



This species is near H. flavodiscus which lacks the pronounced 

 reddish glandular dots on the stipe-apex, and has spores smaller than 

 those of H. glutinosus. We have not found a transfer of Agaricus glu- 

 tinosus Bui. to Hygrophorus and so recognize Peck's original binomial, 

 as did Murrill. 



155 



Hygrophorus albiflavus, sp. nov. 



Pileus 3 cm latus, convexas, albus, viscidus, glaber; caro alba; odore 

 et gustu mitis; lamellae adnato-decw rentes, pallidae, subdistantes, mo- 

 dice latae; stipes 5 cm longus, 7 mm crassus, pallidus, viscidus; annulus 

 fibrillosus; sporae (9)10-14 X 6.5-7.5 /x, cllipsoideae. Specimen typi- 

 cum in Herb. Univ. Mich.; ledum in Mt. Hood, Ore., Sept. 29, 1946, 

 A. H. Smith 23910. 



Pileus 3 cm broad, convex, white over all, viscid, appearing gla- 

 brous, margin even. Context white; odor and taste not distinctive. 



Lamellae adnate-decurrent, pallid, subdistant, medium broad, 

 edges even. 



Stipe 5 cm long, 7 mm thick, pallid, viscid, glabrous up to an apical, 

 fibrillose annulus. 



Spores (9)10-14 X 6.5-7.5 /x, ellipsoid, smooth. Basidia 4-spored. 

 Pleurocystidia and cheilocystidia none. Gill trama divergent. Cuticle of 

 a broad turf of gelatinous hyphae. Pileus trama of radially disposed hy- 

 phae. Clamp connections present. 



Habit, Habitat, and Distribution — On soil, Oregon, September. 



Material Studied — Oregon: Smith 23910 (type, from Mt. Hood, 

 3800 ft., Sept. 29, 1946). 



Observations — This species is white when fresh but, on drying, be- 

 comes warm buff to ochraceous buff, the colors, both fresh and dried, 

 being somewhat suggestive of H. flavodiscus. But the larger spores 

 and fibrillose annulus distinguish it. The veil suggests H. velatus, but 

 that species has much smaller spores, and also H. pleurotoides Favre 

 which has a dark reddish-brown pileus and a strong farinaceous taste 



