278 AGARICUS. 



Naucoria. Name — angjiis, a snake. From the flexuous and spotted stem. Fr. 



Monogr. i. p. 368. Hyin. Eur. p. 255. Icon. t. 122. /. i. Grevillea, vol. 

 X. p. 66. C. lllust. PI. 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 7iot hygrophattoiis, slightly fleshy, convex then 

 pla7ie, 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, cinereotis-light- 

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

 mealy sqiiamules at the apex. Gills ad n ate, 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 caespitose, 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. 

 Hyjn. Eur. p. 255. Be7-k. Out. p. 159. C. Hbk. n. 359. Kalchbr. t. ij.f. 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. 



'^2LvaQ—horizo72 talis, horizontal. Bull. t. 324. Fr. Hym. Eur. p. 256. 

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



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

 cal, unibilicate, plicate, slightly wrinkled-tonientose . 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. 151 1. Flora 1851, /. 505. Plym. Eur. p. 256. S. 

 Mycol. Scot. n. 333. 



