OF SOUTH AUSTRALIA. 
5!I 
The genus Arinillaria is characterised by having a definite ring on the stem, 
white spores and the substance of the stem similar to that of the cap and not 
readily separated from it as in Lepiota. The notorious root-parasite, Arinillaria 
meUea, is common in Australia, and in some parts, Western Australia for 
instance, has been responsible for serious economic loss by killing orange trees, 
rose bushes, &c. We have three other species, the large A. colons, i var. aust-mlix, 
a small species growing amongst moss, A mu.scUtola. and the beautiful orange- 
coloured warty A. asprata on wood. 
KEY TO THE SPECIES. 
Pileus relatively smooth. 
Gills sinuafo-adnexed. 
Large. Pileus brownish. Gills light pinkish 
cinnamon becoming spotted. Spores sub- 
spherical, 7 to 9 y 31. Arinillaria colossa var. 
australis. 
Gills adnato-decurrent. 
Variable, moderately large. Ochraceous yel- 
low, tawny, reddish or yellowish cinnamon, 
honey-coloured, &e., with brownish fibrils or 
warts. Ring apical, usually marked . . . . 32. A. mellea. 
Pileus frosted with granules. 
Small. Amongst moss. Pileus yellow ochre to 
ochraceous tawny .. ‘ 33. A. musoicola. 
Pilens densely covered with conical warts. 
Pileus pale yellow covered with orange-coloured 
wart's. On dead wood 34. A. asprata. 
31. Armillaria colossa Fr. var. australis del. (L., colossus, gigantic: australis, 
southern, but here used for australiensis, Australian). — Pileus 3in. (7.5 cm.) 
or more, at first irregularly convex, then expanding to irregularly plane or up- 
turned, surface fibrillose-matt with some more superficial fibrils, Clay Colour 
(xxix.) to Sayal Brown (xxix.) towards the centre, sometimes much darker. 
Gills sinuate, nearly free, moderately close, jin. (6 mm.) deep, ventricose, short 
ones interposed at the periphery, Light Pinkish Cinnamon (xxix.), when old 
spotted with reddish brown. Stem 2in. (5 cm.) high, J in . (1.2 cm.) or more 
[From a watercolour by Miss R. C. Fiveash, 
Figure 8. — ArmUlaria colossa Fr, var. australis Clel. (No. 31). Mount Lofty. Reduced to §. 
