278 AGARICUS. 



Naucorki. Name anguis, a snake. From the flexuous and spotted stem. Fr. 



Monogr. i. p. 368. Hym. Ezir. p. 255. Icon. t. 122. f. i. Grevillea, vol. 

 x. p. 66. C. lllust. PL 455. 



620. A. centunculus Fr. Pileus 8-20 mm. (4-10 lin.) broad, 

 lurid or olivaceous-fuscous then becoming light yellow-green, be- 

 coming- pale, but not hygrophanous, slightly fleshy, convex then 

 plane, obtuse, often excentric, even, dry, slightly silky under a 

 lens, margin incurved. Stem 2.5 cent, (i in.) or little more long, 

 2-4 mm. (1-2 lin.) thick, fistulose, somewhat equal, cinereous-light- 

 yellow, white-villous at the base and pulverulent with white 

 mealy squamules at the apex. Gills aclnate, but separating, broad, 

 rather thick, sometimes crowded, sometimes distant, convex and 

 undulated when old, light yellow-cinereous, also slightly toothed 

 at the edge with greenish-yellow floccules. 



Spores ochraceous. The margin of the pileus according to Lasch is occa- 

 sionally yellow-pulverulent. The stem varies curved from position, commonly 

 incurved, often excentric. A very singular species, widely removed from all 

 others. Gregarious, even casspitose, firm, tough, and without a veil. There 

 is a smaller variety ; pileus thinner, margin striate, but agreeing in the singu- 

 lar combination of colours, cinereous, yellow and green. 



On rotten wood. Rare. Oct. 



Name cento, patchwork. From the colouring. Fr. Monogr. i. p. 369. 

 Hym. Eur. p. 255. Berk. Out. p. 159. C. Hbk. n. 359. Kalchbr. t. 17. /. 3. 



621. A. horizontalis Bull. Watery cinnamon. Pileus 8 mm. 

 (4 lin.) broad, slightly fleshy, convexo-plane, obtuse, even. Stem 

 solid, very short, incurved, naked. Gills rounded-free, broad, 

 plane. 



Pileus comparatively very fleshy, rufescent. Growing in troops like A. cor- 

 ticola ; at first sight somewhat sessile. 



On elm-trunks. Rare. 



Name horizontalis, horizontal. Bull. t. 324. Fr. Hym. Eur. p. 256. 

 Berk. Out. p. 159. C. Hbk. ?t. 360. Sow. t. 341. 



622. A. rimulincola Rabenh. Cinnamon. Pileus hemispheri- 

 cal, umbilicate, plicate, slightly wrinkled-tomentose. Stem some- 

 what excentric, short, incurved, somewhat thickened at the base. 

 Gills adnexed, somewhat distant, thick, very broad, whitish- 

 crenulate. 



Spores ovoid, cinnamon. 

 On cut elm. Rannoch. 



Name rimula, a small crack ; colo, to inhabit. Growing in crevices of the 

 bark. Rabenh. Exs. n. 1511. Flora 1851, /. 505. Hym. Eur. p. 256. S. 

 Mycol. Scot. n. 333. 



