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C l a s s a n d O r d e r CRYPTOGAMIA FUNGI, L m n — N a t . O r d . HYPOXYLA,
De Cand.
GEN ERIC CHARACTER.
Perithecia subcornea. Asci clavati. Sporidia septala, opaca, pulveris instar
atri expulsa.—Rigidoe, nigrescentes, adnato-super/¡dales, velo puherulento
fu g a d .—F HIES.
Perithecia subcorneous. Asci clavate. Sporidia septate, opake, a t len g th
escaping lik e a b la ck p ow d e r.—Rigid, be coming black, adnate or superficial,
w ith a p u lv e ru le n t fugacious covering.
S P E C IF IC CHARACTER.
H y p o x v lo n c o n c e n tr ic um ; globoso-dijj’orme, fusco-nigricans, intus stratis
concentrids zonatum, peritheciis oblongis peripherids immersis.—A g .
H . uneq u ally globose, brow n ish -b la ck , zoned w ith in w ith concentric lay e rs ;
p e rith e c ia oblong, immersed in th e circumference.
S p h æ r ia concentrica. Bolt. Fung. t. 180.—Per«. Syn. Fung. p. 8. 1. 1 . f. 3 ,-4 .
Ejusd. Comm. Clav. p. \S .— Alb. et Schmein. p. S.— B e Cand. FI. Franç.
V. 2. p. 284.—Ejusd. Syn. p . 69.— Schum. FI. Soell. v. 2. p. 177-—Fries,
Sclerom. Suec. No. 141.— Wahl. FI. Lapp. p. 1003.— Hook. FI. Scot. P t. 2.
p. 4.— Schmein. Fung. Carol, No. 12.— Nees, Syst, t. 40. f. 308.—Fries,
Syst, Myc, v. 2. p. 331.
S p h æ r i a f r a x in e a , Sibth. FL Oxon. p . 4 0 1 .—Sow. Fung. t. l 60.—- Bot.
Arr, V. 4. p . 467.—Belh, FI, Cant, p . 569.—Purt, Midi, FI. v. 2. p . 708.
S p h æ r i a tu n ic a ta, Tode, Fung. 2. p . 59- t. 17. f. 130.
S p h æ r i a Fschscholzii, Ehrenb. Hor. Berol, t. 18. f. 8. f d e Fries.
L y c o p e r d o n fr a x in e um , Huds. FI. Angl. p . 64 1 .
L y c o p e r d o n a trum , Schoeff. Fung. t. 329.
V a l s a tuberosa. Scop. FI. Cam. p . 399.
F u n g u s f r a x in e u s n ig e r d u r u s o rb ic u la tu s , Ray, Syn. p . 16.
H ab. O n th e tru n k s o f v arious trees, th e whole year, n o t unfrequent.
Plant 1-2 inches in diameter, u n e q u a lly globose, sessile or somewhat stipita
te ; in th e y o u n g state red d ish -b row n a n d pruinose, a fte rw a rd s sub-
rugose, brow n ish -b la ck ; th e ex te rio r h a rd and b rittle , deciduous, min
u te ly d o tted w ith th e orifices o f th e p e rith e c ia ; th e in te rio r brown,
somewhat spongy, fibrous, shining, an d distin c tly composed o f concentric
strata. Perithecia oblong, w ith a p lan e orifice. Sporidia opake, elliptical.
A large and not rare species, too well marked to require
further illustration. The old genus Hypoxylon now jestored
hy F r i e s , I have here adopted, and shall explain more particularly
hereafter.
F ig . 1 . a, H. concentricum. b , A section, n a tu ra l size, c. Portion o f the
stroma, with perithecia, d, Sporidia ; magnified.