íí.l
386 H Y D N A C E .E
LXXIII. IRPEX Fr.
Irpex
(From a fancied resemblance in the fruiting surface to the teeth of a
harrow, irpex)
Hymenium inferior, toothed, teeth firm, somewhat coriaceous,
acute—spathulate in 1753—concrete with the pileus or subiculum,
_ Fig, i i .—I., I rp e x fu sannolaceus Fr, ; B, section of same ; two-thirds natura l size, c, d , teeth
01 a itto ; X 3. E, /. peftdultis F r., teeth enlarged. F , I . obliquus F r ., ditto • G , ditto • X 6
H , / . d eforjms F r ., teeth enlarged, j , I . spathulaHis F r ., teeth 1X3 .
arranged in irregular rows, like broken gills or broken honeycomb,
connected at the base by veins or folds, Basidia 4-spored, (Fig. 88.)
Generally growing on wood, somewhat sessile or resupinate,
approaching Lenzites and Dcedalea. Species 1748—1756
Pendulous, with the pileus extended behind. 1748
Effuso-reflexed, marginate. 1749 1751
Resupinate. 1752—1756
1748. I. pendulus Fr. (from the pendulous habit) a c.
P. membranous, slightly rugose or plicate, adpressedly squamu-
loso-pilose, light yellow to white-brown. Te. in rows, large,
incised, white.
Sticks, pine, larch, spreading on to moss ; rare, i f in. ; group 2I in Must
not be confounded with 1757.
Lrpex H Y D N A C E .E 387
1749. I. fuseoviolaeeus Fr. (from the brown-violet colour of the
teeth; fuscus, brown) abc.
P. coriaceous, silky, zoned, brown-white to ochre-white, zoned
brownish. Te. in rows in the form of much incised plates, of
the purple-slate-whitish tint seen in the gills of some Prafella.
Single to imbricate. Pine, beech; rare. 2| in. ; group 4J in. Sometimes
there is a considerable development of pileus.
1750. I. laeteus Fr. (from the milk-white colour; lac, milk)« b c.
White.
P. coriaceous, villous, concentrically sulcate. Te. crowded,
gyrose in rows, acute, somewhat incised. Irregularly porous at
marg., becoming ragged at middle and base.
Sometimes subimbricate. Mountain-ash, birch, fir, beech. Nov. Group
3 i in-
1751. I. hypogseus Fiick. (from its sometimes growing in and under
earth; Gr. hupo, under, ge, the earth) abe.
Myc. dispersed, white to yellowish. Sub. marg. determinate, compactly
byssoid, white, then pallid brown-ochreous to dark
brown; hymenium often barren or exhibiting barren patches.
Te. irregular, somewhat labyrinthiform, lax, variable in size,
straight, incised 2-6 mm. long, base usually compressed,
colour as P.
Woods, pine, investing pine-leaves, twigs, grass, earth, pebbles ; rare. Oct.
Group 4® in.
1752. I. Johnstonii Berk, (after Dr. George Johnstone) a.
Effused, coriaceo-membranous, separable from matrix ; marg.
naked, reflexed all round, white. Te. compressed, unequal,
arranged in rows, resembling the spines of Hydnum, but seated
upon fine folds.
Dead beech. May be a form of 1750. i® in. ; group 3® in.
1752a. I. eandidus Weinm. (from the shining white colour; candidus,
white) a. Snow white.
Broadly effused, thin, separable, arachnoid, flaxy at the marg.
Te. subulate, or compressed, thin, toothed.
Dead wood, pine. Feb.
1753. I. spathulatus Fr. (from the shape of the teeth; spafha, a
spatula) a b c.
Effused, membranous, flaxy, then smooth, white to biscuit. Te.
entire, somewhat large, reticulato-connected with obsolete
veins. Marg. sometimes obsolete, at other times broadly
barren, with other barren places on hymenium. Never porous.
Larch, Nov, 4§ in.
1754. I. obliquus Fr. (from the oblique teeth) abc.
Effused, forming an adnate crust, white, clouded and shaded pale
sienna ; marg. broadly barren; circ. flaxy. Te. extended from
2 c 2
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