0
I
JSÇ.
H Y S T E R I U M f o l i i c o l u m , /3 H e d e r æ ,
Various Hysterium.— I v y 4 e a f variety.
C l a s s a n d O r d e r C a y P T O G A M IA F U N G I , £m « ._ N A T . O r d . H YPO X Y LA ,
De Cand. Grev.
GENERIC CHARACTER.
Cni.ita nulla. Perilhecium plerumque oblmgum, corneum, rima hngitudinali de-
hucens. Sporulæ in iuhulis hyalinis, ehngatis, erectis, gelatinosis.
Crust none. Penthecium mostly oblong, corneous, bursting by a longitudinal
slit. Sporules contained in hyaline, elongated, erect, gelatinous
tubes. ®
SPECIFIC CHAHACTER.
H ysterium foliicolum; innatum, sparsum, ellipticum, obtumm, tmnidulum, loeve,
nudum, nigrum, rima hngitudinali d e p rm a .—F ries.
H. innate, scattered, elliptical, obtuse, rather tumid, smooth, naked, black
with a longitudinal depression.
H y s t e r iu m foliicolum. Fries, V. A. H . I8 I 9 , p . Ï02— Ejusd. Syst. Mycol.
2. p. 592. o J
/3, Hederæ, elhptical, subacute, opening, and somewhat g ap in g . Fries, Syst
Mycol. 2. p. 593. ■ ^ a , J
H y sterium Hederæ, Mart. Erlang, p. 472.
H ypodermA kylomoides, y, Hederæ, De Cand. FL Franç. v. 6. p. 16,5.
H ad. On the dead leaves of Hederá helix, the common Ivy, in spring. In
the grounds of D r Buchanan H amilton at Leny.
On both surfaces of the leaf, scattered, not occurring on pale defined spots;
of different sizes, black, smooth, elliptical, rather acute at each extremity,
penetrating the substance of the leaf, tumid, and at length opening
with a m oderately wide fissure. Sporuliferous cells clavate. Sporules
globular. ^
The species of which the individual now figured is a variety,
I hope in a short period to be able to represent: in the
mean time, I have profited by recent specimens to exhibit one
state of this variable plant, which Well deserves illustration. I
have adopted the name given in the 2d volume of the admirable
Systema Mycologicum, which I have fortunately received
V O I , . I l l ,