244 
THE LARGER FUXGI 
HYDNACEAE. 
“Ilvnieniuni spread over the surfaee of spines, granules, warts or other 
protuberances, or of quite a smooth surface, with the intervening spaces sterile. 
Receptacle fleshy, coriaceous, waxy, crustaceous or floccose, rarely none.” — Rea. 
In the Hydnaceae, the hymenium or spored)earing surface is spread over spines, 
warts or granules. In the higher forms, the spines are long and awldike, in other 
genera they may be flattened, plate-like, nodular or so small as to require a lens 
to recognise them. The plants may be fleshy, cork-like, waxy or crust-like. There 
may bo a well-developed central or lateral stem and cap, or the attachment of 
the fungus may be lateral and broad, or the whole plant may be effused over 
the stratum on which it has grown. 
MUCRONELLA Er. 
(L., mucroueUa, a little sharp point.) 
‘‘Receptacle none, consisting of a floccose, fugacious mycelium. Spines simple, 
cylindi-ical, subulate, acute, scattered or fasciculate, and then more or less connate 
at the base. Spores white, oblong or subglobose, smooth or punctate; basidia 
with 1-4 sterigniata. Cystidia present, Growing on wood.” — Rea. 
Xo Australian species recorded. 
HYDNUM (L.l Fr. 
(Gr., Jiydnon, the old name for a truffle.) 
‘ ‘ Receptacle flesliy, coriaceous or corky, simple or branched, pileate or 
coralloid, stipitate or sessile. Stem central, lateral or none. Spines subulate, 
acute, distinct at the base. Flesh white or coloured. Spores white or coloured; 
elliptical, oval, globose, subglobose or angularly globose; smooth, granular, 
verrucose or echinulate; basidia with 2-5 sterigniata. Cystidia present or absent, 
ilicro- and macro-conidia present in some species. Growing on the ground or 
on wood.” — Rea. 
KEY TO THE SPECIES. 
Fleshv. Light ochraceous buff, spines slightly 
decurrent, stem central or eccentric 390. ITydnum repandum. 
Rigid, coriaceous. Often confluent. 
Smoky brown. Spines grey. Strong smell .. .. M91. II. graveolens. 
Ferruginous brown. Spines dark ferruginous 
brown. No strong smell il92. H- zonatmn. 
:’,90. Hydnum repandum (L.) Fr. (L., rcpanduK, bent backwards). — Pileus I to 
1 lin. (1.8 to 0.7 cm., in Britisli specimens 5 to 15 cm.), nearly plane or slightly 
depressed or slightly convex, usually irregular, surfaee dull, edge turned in when 
young, fleshy, pallid with a buffy tint becoming Light Ochraceous Buff (xv.). 
Spines adna'te with a decurrent tendency, 1 to nearly din. (d.5 to 10 mm.) long, 
crowded, unequal, entire, subulate to conical or blunt, buffy cream becoming 
Light Ochraceous Buff (xv.). Stem 1) to 2in. (.'1. 2 to 5 cm.), moderately slender 
(up to tin., 1.2 cm., thick), central or sometimes excentric or nearly lateral, 
ecjusil or slightly attenuated u].nvards, solid, white or whitish, with ochraceous buff 
stains appearing, Flesh brittle, whitish becoming near Ochraceous Orange (xv.). 
Taste none. Spores subsoherical to irregular, whitish, 5.(5 y. Single or sub- 
caes[)itose, on the ground. South Australia — Mount Lofty. New South Wales. 
April, .lune. (Figure 55.) 
This edible species is not common with us. It may be recognised by its fleshy 
texture, light ochraceous buff colour, an excentric or central stem, and the more 
or less decurrent spines on the under-side of the often irregular pilehs. 
:!9L Hydnum graveolens (Delast.) Fr. (L., graveolen.<i, strong smelling). — 
Caespitose with slender stems ami pilei which may become united at their edges. 
Pilei to tin. (9 to 2.5 cm.), more or less umbilicate to nearlv infundibuliform, 
often irregular, radiately striate, rigid, brittle, rather shining, smoky brown. 
Spines ci'owded, subulate, about 1.2 mm. long, glaucous to dai'k grey. ^Sterns 
lin. (2.5 cm.), slender (1 to 2 mm. diameter) or sometimes flattened to 5 mm., 
