OF SOUTH AUSTRALIA. 
283 
M. <unhiguus (^itta(l.) Tulasiie has l)een recorded for Xew Zealand but the 
genus has not yet been found in Australia. 
[Peridium rvith lateral rhizomorplis. Spores globose. This genus Sderogaster 
has not yet been recorded for Australia or New Zealand.] 
Sectiox II. — Peridium with a radicate base; without a columella; spores 
elliptical, smoioth or variously sculptured. 
HYMENOGASTER Yittadini. 
(Gr., hymrn, a membrane; gastfr, the belly.) 
Plants subglobose, pyriform or occasionally tuberiform, attached to the sub- 
stratum by a radicate base or strands, lateral rhizomorplis being absent. 
Peridium of one oi two layers, composed of stupose or pseudoparenchymatous 
liyphae. Gleba of tramal plates anastomosed to enclose numerous subglobose 
ca'.ities lined with the palisade hymen%im; columella absent. Spores elliptical, 
coloured, smooth or more often covered with a tirm, wrinkled or otherwise 
roughened gelatinous membrane; basidia persistent, cylindrical, bearing 2 to 
4 spores on short stout sterigmata. Growing superficially or partially submerged 
in soils rich in vegetable debris. — Cunningham. 
KEY TO THE SPECIES. 
Spores perfectly smooth. 
Spores 7 to 10 g long 
Spores 13 to 10 g long. 
Peridium reddish brown 
Peridium golden yellow 
Spores 18 to 22 g long 
Spores covered with a tine membrane which in mature 
plants is rugulose-areolate or verrucose. 
Peridium of two distinct layers 
Peridium of a single layer. 
Spores 12 to 10 g long. 
Spores elliptical, 4 on each basidium . . 
Spores fusiform, 2 on each basidium . . 
Spores 10 to 22 g long 
Spores with strongly reticulateil membrane. 
Endospore markedly thickened 
Endospore thin 
447. Hymenogaster 
Maidcni. 
n. 
tasmanicus. 
H. 
aureus. 
11. 
fusisporus. 
448. n. 
luteiis. 
H. 
nanus. 
IT. 
aibcllus. 
II. 
seylanious. 
H. 
macrosporus 
449. n. 
retiouVaiiiis, 
447. Hymenogaster Maideni Rodw. (In honour of ,T. II. Maiden, F.R.S., for 
many years Director of the Botanic Gardens, Sydney). Plants irregularly globose 
or oblong, to Ifin. (4 cm.) diameter, dull white, becoming dingy brown when 
dried. Peridium 50 to 200 g thick, of closely wc)ven gelatinized hyphae, hyaline. 
Gleba pallid buff or pallid cinnamon brown, cells empjty, sid)globose, 1 to 2 mm. ; 
tramal p)lates 50 to 100 g thick, of densely woyen gelatinized hyphae; basidia 
4-spored. Spores broadly elliptical or slightly obovate, pallid ferruginous, 7 to 
10 X 4.5 to 6 g, perfectly smooth, shortly pedicellate. — Cunningham. South 
Australia — Encounter Bay, Upper Tunkalilla Creek, Second Yalley Forest Reserve, 
Stirling West. Tasmania. May, June, July. 
448. Hymenogaster liiteus (Mass.) Cunn. (L., lute-us, pale yellow like the yolk 
of an egg) — Plants irregularly globose, subglobose or pyriform, to 2iin. (3 cm.) 
diameter, yellowish ochre to ochraceous tawny when fresh, and viscid. Peridium 
250 to 300 g thick, of two definite layers, an inner coloured pne of pseudo^ 
parenchyma, and an outer layer arising from this, of loose hyphae arranged 
radially and embedded in a thick gelatinous matrix. Gleba dark umber brown, 
firm, cells subglobose, 1 to 2 in 1 mm., empty; tramal pdates 50 to 150 /r thick, 
of woven hyphae strongly gelatinized, scissile, tinted, frequently with fa, small 
dome-like base; basidia 2 to 4-spored. Spores broadly elliptical or slightly 
obovate, golden brown, 11 to 15 x 9 to 11 g, shortly pedicellate, covered with a 
gelatinous tunic which is 2.5 g thick and markedly areolate. — Cunningham. South 
Australia — Mount Lofty, Stirling West, National Park. New South Wales. 
Tasmania. New Zealand. .Tune, July. 
