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S PHÆ R IA TUBÆFORMIS.
Tubiform Sphoeria.
C là s s a n d O r d e r CRYPTOGAMIA FUNGI, im r a— NAT . O r d . H YPO X Y LA ,
De Cand.
G EN ERIC c h a r a c t e r .
Perithecium gelatina, diu farc ta. Asci subclavati, .sporidiis simplicibus pellucidis,
villi vel fum i instar expulsis.—Innatæ, epidermide iectæ, dein sæpe erum-
pentes.— F r i e s .
Perithecia remaining for a long time filled with gelatine. Asci subclavate.
Sporidia simple, peUucid, escaping in the form of a villose mass or vapour.—
Innate, covered with the epidermis, at length often bursting
through it.
S PE C IF IC c h a r a c t e r .
S p h æ r ia tubæformis ; peritheciis tectis, depresso-globosis, glabris, ostiolo rostellato
striato, suboequalifulvo.
S. perithecia concealed, depressed-globose, glabrous, the orifice beaked,
straight, subequal, reddish-brown.
S p h æ r ia tubæformis, Tode, Fung. 2 . p . 51. t. 16. f. 128.— Pers. Syn. Fung.
p . 60.—Alb. et Schwdn. p . 31.-—Nees, Syst. t. 42. f. 343.—Schmidt, Myc.
Heft. 2. t. 2. f. 7.—Moug. et Nestl. St. Exs. No. 280.—Schmidt et Kunze,
No. 56.— Fries, Scler. Suec, No. 26.— Syst. Mycol. V. 2. p. 5 l6 .— Mart.
Fl. Erlang, p . 487.— Hook. Fl. Scot. Pt. 2. p . 7— Schwein. Fung. Carol.
No. 148.
H ab. O n d e ad leaves o f v a rio u s trees, freq u e n t in w in te r a n d spring.
Gregarious, small. Perithecia orbicular, flattened, permanently concealed
beneath the epidermis, the orifice exserted, rigid, straight, thickish,
nearly equal or somewhat subulate, b u t obtuse at the apex, glabrous,
and of a reddish-brown colour. Asci clavate-eUiptical, containing 6-8
oval pellucid sporidia irregularly arranged.
This is a very common species, occnrring principally npon
the leaves of Alnus glutinosa, Fagus sylvatica, Corylus
Avellana, and Betula alba. It has, however, been only recently
observed in Great Britain.
Fig. 1. a, S. luhaformis, natural .size, b, Perithecia. c, Perithecium divided.
d, Asci and sporidia ; magnified.
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