16 Armillaria. 



[verrucipes, Fr. Pure white. P. glabrous ; s. with brown warts 

 up to annular zone, ring absent ; g. sinuato-adnate. 



* * Gills narrowed behind, more or less decurrent, 

 with no sinus. 



[imperialis, Fr. P. brown with darker scales ; g. deeply decur- 

 rent; ring double, sp. 12 14 x 5. 



[Laschii, Fr. P. fawn colour, even, glabrous, thin ring erect; 

 g. crowded, white. 



[tumescens, Viv. P. exp. even, glabrous, whitish; g. adnate, 

 pale ochre, then tinged red ; s. solid, stout, narrowed from the base, 

 whitish, ring fugacious. 



[rhadigosa, Fr. P. depr. moist, whitish with brownish adpressed 

 scales at disc ; g. decur., broad, white ; s. short, equal, ring reflexed. 



mellea, Vahl. P. 5 12 cm. soon expanded, yellowish-brown, 

 squamulose, margin striate ; g. slightly decurrent ; s. 8 12 cm. 

 floccose up to spreading ring, base honey-colour ; sp. 9 x 5 6. 



Mycelium forming long black strands. A destructive parasite. 



denigrata, Fr. P. 3 5 cm. obtuse, dark brown, rather viscid, 

 spotted with droplike depressions, and with elevated warts, margin 

 even ; g. rather decurrent ; s. 4 5 cm. solid tinged brown, ring 

 disappearing; sp. - . 



[mono, Fr. P. campan.-exp. irreg. cracked, viscid, greyish brown 

 then rufescent ; g. adnate ; s. solid, fibrous, ring narrow. 



[Viviani, Fr. P. convex, glabrous, dark bay then whitish; g. 

 adnate, pale fawn ; s. elongated, white, ring narrow. 



[griseofusca, D. C. P. convex, even, glabrous, brownish grey, 

 discoid ; g. decur. ; s. equal, glabrous, ring persistent. 



[pleurotoides, Fr. P. subexcentric, ring toothed; s. whitish 

 with a flesh-coloured tint. 



citri, Inz. P. 2 3 cm. soon plane, subumb., even, yellow; g. 

 adnate ; s. 57 cm., slender, ring spreading ; sp. subgl. 5x4. 



subcava, Schum. P. 34 cm. white, umbo brownish, striate to 

 middle ; g. decurrent ; s. equal, hollow upwards, 4 5 cm., even up to 

 torn ring, punctate above, white ; sp. - . 



Differs from A. constricta by longer thinner stem, and striate 

 pileus. 



haematites, B. and Br. P. 23 cm. obtuse, liver-coloured ; g. 

 adnato-decurrent ; s. 35 cm. coloured like pileus up to ring, whitish 

 above ; sp. 8 x 5. 



*** Gills adnate without a sinus. 



[laqueata, Fr. White. P. 34 cm. hemispherical, obtuse, viscid 

 when moist, smooth ; g. adnate ; s. 5 7 cm. solid, squamulose or 

 fibrillose below the ring, base tinged brown ; sp. . 



