Gen. XVI. MERULIUS, Hall.
Hymenium ceraceo-molle, plicis obtusis reticulatum.
The reticulate folds distinguish this g enus from its alliés. The species belong principally to temperate regions.
.A. conum. is very iridely distributed, and assiunes various forms. (Name originally given to the Morel, from merus,
pure (safe to ea t), and transferred to F u n g i w ith a reticulate hymenium by Haller.)
1. M e n iliv is c o rium (Er. El. p. 58).
H a b . On dead wood, Archer.
2. Meruliua p a llens (Berk, in Ann. Nat. Hist. vi. 357).
H a b . On dead wood. Archer.
Some states are scarcely distinguishable from Plilebia.
Gen. XVII. POEOTHELIUM, Fr.
Hymenium papillatum, papillæ demum aperte cum liymenophoro contiguæ.
The resupinate species are immediately connected w ith Polyporus b y the corky P. rugosum, fi-om South
America. From Fistulina the genus is distinguished b y habit rather than b y any definite characters. (Name
from TTopos, a pore, and OgXg, a pap)
1. Porothe lium su b tile (Er. Ep. p. 504).
H a b . On dead wood. Archer.
Gen. X V in . HYDNUM, L.
Hymenkm aculeatum ; aculei liberi, deorsum spectantes, nisi in resupinatis.
A lai-ge genus, containing the greater part o f the Fun g i which bear true prickles in contradistinction to broken
pove-walls on the hymenium. H. repandum, a Tasmanian speeies, is one o f the best esculent F u n g i. (Name from
vSvov, a fungus)
1. Hydniim lævigatum (Swartz; Er. Syst. i. p. 399).
H a b . On the ground. Archer.
2. Hydnum repandum (L. Suec. 1258).
H a b . On the ground, J. B . H.
3. Hydnum cervinum (Berk.) ; resupinatum, cffusum, immarginatum, vinoso-pallidum, primitus
subtiliter toraentosum, aculéis setiformibus.
H a b . O n dead w o od . Archer.
Very thin, effused, resupinate, at first minutely tomentose, arachnoid, then partially shining, as if washed with
a delicate coat o f gura, o f a pallid-fawn tint. Prickles slender, short, setiform.
4. Hydnum filic ico la (Berk.) ; resupinatum, effusum, immarginatum, album, tenue, setulis basi
poroso-conncxis applaiiatis acutis.
H a b . On dead Eem-stems, Archer.
Resupinate, thin, effused, immarginate, white, forming a thin membrane neither distinctly farinose nor tomentose.
Teeth connected at the base so as to form imperfect pores, flat, acuminate, often triangular.— An obscure species,
which bears a distant resemblance to Polyporus vaporarius, and appi’oaches in its characters the genus Irpex.
5. Hydnum udum (Er. Ep. p. 517).
H a b . On dead wood, Archer.
Gen. XIX. lE P E X , TV.
Ilymemum inferum, primitus dentatum; aculei varii, seriatim 1. reticulatim dispositi basique plicis
lamellosis (in sessilibus) porosisve (in resupinatis) concateuati.
Distinguished ft-om Hydnum b y the connected teeth. From Polypori they differ in no t being essentially
porous. (Name from irpex, a harrow.)
1. Irp e x A r ch eri (Berk.); albus, resupinatus, margine tomentoso aracbnoidco, dentibus reticulato-
conncxis brevibus palmatis. (T a b . CLXXXIII. Fig. 1.)
H a b . On dead wood. Archer.
Effused, resupinate, w hite; margin thin, tomentose, arachnoid, barren. Teeth connected at the base, short,
palmate.— This curious species is allied to Radulum palmatum. Be rk ., and with that and one or two more w ill probably
form a genus distinguished from Irpex by its palmate teeth. In R. palmatum (Ann. N a t. H is t. ix . p. 4 4 5 ) the
teeth are one or two lines lo n g ; in this, which has essentially the same structure, they do not exceed half a line. The
genus, i f It be thought worthy o f being distinguished, may be called Cladodontia.— ¥hs.T-E C L X X XI II. F ig . 1 ; a,
plant, nat. size; b, hymenium, magnified.
Geu. XX. GEANDINIA, Fr.
Hymenium amphigenutn, ceraceum, primitus granulosum, granulis subsphasricis obtusis excavatisque.
Distingu ish ed from allied genera by the granular nature o f tbe aeulei. The species approach sometimes very
close to Kneiffia. (Name from grando, hail; in allusion to the granular hymenium.)
1. Grandinia granulosa (Er. Ep. p. 527).
H a b . On decorticated wood. Archer.
2. Grandinia au stralis (Berk.); resupmata, effusa, immarginata, pallida, rimosa, intus nivea, hjme-
nio granúlate, granulis uni-bipapillatis.
H a b . Ou dead w o od . Archer.
Entii-ely effused and resupinate, without any evident margin, pale, white within, cracked. Hymenium rough
with unequal granules, each o f which has one or more distinct papiUm.— This appears to be quite distinct from any
o f the European species, aud to approach near to Kneiffia, from which it differs only in the pap iUs not being pro”-
longcd into bristles. °
Gen. XXI. ODONTIA, Fr.
Hymenium inferum, fibroso-contextum, protrudens verrucas apice cristato-multifidas inter se discretas.
A genus consisting o f a few species only, separated from Hydnum by its wart-like, crested aculei. (Name from
oSoav, a tooth)
1. Odontia se c ern ibilis (Berk.); resupinata, membranacea, seccrnibilis, alba, aculéis brevissimis
compressis subdivisis.
U a b . On dead wood, J. B . H., Archer.
Resupinate, separating entirely from the matrix, white, membranaceous, rather irregular. Teeth very minute,
short, tomentose, compressed, slightly divided or toothed.— This has the habit o f H. ochraceum, but the teeth of
Odontia.
VOL. I I . 3 p