DECADES OF FUNGI. 573 
centre, thin at the margin, which is slightly lobed. Stem one to 
two inches high, attenuated below, solid, slightly silky, lineated 
above; or in solitary individuals, short and obtuse. Gills rather 
broad above, attenuated and decurrent behind, and forming lines 
on the stems; interstices even. Spores broadly ovate, white, or 
when seen in a dense mass, tan-coloured.* 
The solitary individuals present quite a distinct aspect, having a 
short obtuse and less silky stem, and the gills, though much 
attenuated at the base, ending abruptly. Occasionally a pileus of 
a similar form occurs in the midst of a tuft. So phosphorescent, 
that Mr. Gunn was able to read by its light, and it remained 
luminous for six days or more after being gathered. It is cer- 
tainly distinct from the two phosphorescent Australian species, 
A. nidiformis, and A. lampas, described in my first Century. 
A curious specimen, supposed to be of this species, or possibly 
A. salignus, was found growing on Acacia dealbata, from the 
cavity in which the caterpillar of a Cossus had been nursed, and 
entirely filling up the shell of the Pupa with its mycelium, so as 
at first sight to appear parasitic on the insect. 
193. A. (Pleurotus) affizws, n. s.; latissime gregarius ; pileo 
. demum latere affixo cyphellæformi plicato-striato ; stipite brevi 
tenui reflexo ; lamellis adscendentibus arcuatis adnatis. Gunn, 
No. 1788. 
Has. On bark of a young tree of Æucalyptus amygdalina. 
Penguite, Jan. 6, 1846. 
Covering the bark in broad patches. : 
Pileus one line and a half broad, reflexed and attached by the 
side, cup-shaped, plicato-striate, smooth, membranaceous. Stems 
short, smooth, recurved, adnate, with the gills rather distant and 
thick, ascending, arched, attached to the apex of the stem only. 
The matrix is here and there clothed with a thin, white, downy 
mycelium. The colour of the species when fresh is probably white, 
with a yellowish or rufous tinge on | e ca which, in the dry 
> This perhaps arises from their being impregnated with the colouring matter of 
the Pileus. See Tul. in Ann. des Se. Nat. 3 Ser. v. 5. p. 361. 
3yr? 
