t-.
HYSTERIUM F r a x i n i .
Ash-branch Hysterimu
C l a s s a n d O r d e r CRYPTOGAMIA FUNGI, Z - îm — N a t . O e d . HYPOXYLA,
De Cand. Grev.
GEN ERIC CHARACTER.
Crusta nulla. Peridium oblongum, rima longitudinali dehiscens. Thecoe elon-
gatæ, erectoe,Jilameniis gelatinosis immixlæ.
Crust none. Peridium oblong, bursting by a longitudinal slit. Thecæ elon-
gate, erect, mixed with gelatinous filaments.
S P E C IF IC CHAUACTEU.
H ysterium Fraxini; convexum, tumidum, obhngo-ellipticum, nigerrimum, modo
subconcentrico dispositum, sporulis magnis flavis.
H. convex, tumid, oblong-elliptical, very black, disposed in a subconcentric
manner ; sporules large, yellow.
H ysterium Fraxini, Pers. Disp. Meth. Fung. p. 5.—Syn. Fung. p. 100. Alb.
et Schmein. Consp. Fung. p. 55.—Schwein. Fung. Carol. Sup. No. 244.__
Moug. et Nestl. PI. Exsicc. No. 267.—Purt. Mid. FI. v. 3. p. 3ig. t. 32.__
Hook. FI. Scot. 2. p. 8.— Crev. Ft. Edin. ined.
H ypoderma Fraxini, De Cand. FI. Franç. ed. 3. v. 6. p. 167.—Syn. p. 64.__
Cray’s Nat. Arr. v. 1. p. 509.
Sphæria sulcata, Bolton, Fung. t. 124.—Now. Fung. t. 315 With. Bot. Arr.
ed. 6. V. 4. p. 469.
Had. On the smaller branches of the Ash tree (Fraxinus excelsior) in autumn
and spring, very common.
Plants varying in shape, but mostly obtusely elliptical, bursting through the
bark, tumid and projecting, corneous, very black, scattered or irregularly
arranged in a concentrical manner, quickly causing the bark to decay
from that portion of the branch on which they are produced, when
they appear as if growing on the naked wood. Thecoe club-shaped, very
obtuse, containing 6-8 oval large yellow sporules.
One of the best known and most common of the genns,
It was first described by B o l t o n , who, taking it at first sight
for a Sphæria, was bound to make it agree with the character
VOL. II.
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