%l
>(•
I'i ■ if
n. f
If-
¡4
t ì .
s s
HYSTERIUM m e l a l e u c u m .
Whortleberry-leaf Hysterium.
C la s s a n d O r d e r CRYPTOGAMIA i ’UNGI, £ im i— N a t . O h d . HYPOX Y LA ,
De Cand. Grev.
GEN ERIC CHAHACTEH.
Crusta nulla. Peridium plerumque oblongum, corneum, rima longitudinali dehiscens.
Sporulce in tubulis hyalinis, elongatis, erectis, gelatinosis.
Crust none. Peridium mostly oblong, corneous, bursting by a longitudinal
slit. Sporules contained in hyaline, elongated, erect, gelatinous tubes.
S P E C IF IC CHARACTER.
H ysteriom melaleucum ; minutum, nigrum, irregulariter gregarium, ovale vel
subrotundum, convexum; tubulis sporuliferis clavalis.
H. minute, black, irregularly gregarious, oval or roundish, convex ; sporuliferous
tubes club-shaped.
H ysterium melaleucum. Fries, Obs. Mycol. v. 1. p. 192. t 2. f d e Moug. et
Nestl.—Moug. et Nestl. PI. Exsicc. No. 654.
H ab. On the dead leaves of Vaccinium Vitis Idcea. Ben Lawers. August.
Messrs H ooker, A rnott and G reville.
Gregarious, lying in all directions on the leaf, minute, black, very convex,
varying in form from oval to nearly round, the orifice extending from
end to end, and opening so much as to shew the grey mass o f sporuliferous
tubes within. Sporuliferous tubes rather short, hyaline, davate.
Sporules indistinct.
This addition to the British list of H y ste ria , was made in a
late excursion this season (1823), by Dr H o o k e r , Mr W a l k
e r A r n o t t and myself. W e found it on Ben Lawers,
above Loch na Cat, but so sparingly, that very few leaves producing
it were discovered. It is a remarkably neat-looking
species, and peculiar in the roundness of its figure.