1;
7
534 ÆCIDIACEI.
exs.no. 84. Sow. t. 410. Eng. F I . y . p. 373. Moug. exs. no. 184.
Kl. exs. no. 97. Gard. Chron. 1862,y>. 689.
On pear leaves. Autumn. [Maine, U.S.]
The Podisoma sabince is related to this plant, according to CErsted, as one
of its forms—see no. 1517. ante.
1598. R oe ste lia co rnuta. Tul. “ Horn.like Roestelia.”
S p e k m o g o n b s . Spots rusty-brown, usually distinct from t b e
tufts of peridia ; spermatia white.
P r o t o s p o e e s . Spots rusty-brown; peridia cylindrical,
slightly curved, yellowish-brown; spores greyish, at length
brown.—CooheM.F.t. 2, f . 18, 19. Coohe exs. no. 1. FcM. exs.
no. 284. Seem. Journ. ii. p. 33. Kl. exs. no. 96. JEcid, cornutum.
Eng. FI. v. p. 373. Sow. t. 319. Grev. 1.180. Moug. exs. no. 183.
On the under surface of tbe leaves of the mountain ash (Pyrus
aucuparia.) August. Not common. (Fig. 218, enlarged.)
1 5 9 9 . Roestelia la c e x a ta . Tul. “ Fringed Rcestelia.”
S p e r m o g o n e s .
P r o t o s p o r e s . Peridia clustered in tufts, brown, elongated,
splitting to the base in segments; spores light brown.— Coohe
M .F .t.2,f 22-26. Coolce es.no.2. Fckl. exs. no. 286. Berk,
exs. no. 111. Seem. Journ. ii. p. 33. Gard. Chron. 1861, p. 336.
Cooke L.F. no. 50. zFcid. laceratum. Sow. t. 318. Eng. FI. v. p.
373. Grev. t. 209. Rav. exs. v. no. 96.
On the under surface of the leaves, and on tbe petioles and fruit
of the Hawthorn. Common. May to July. [New York, &c.]
This species is said also to be in some manner associated with Podisoma
Juniperi—see no. 1516. ante.
Gen. 183. FERIDERMIVia, Cbev.
Peridium elongated, at length
bursting irregularly. Spermo-
gonia scattered, conspicuous.—
(Fig. 219.)
ÆCIDIACEI. 585
1600. Peiid exmmm p in i. Chev. “ Scotch fir Peridermium. ’
S p e r m o g o n e s . Vernal or autumnal, or both; spermatia
large, white.
P r o t o s p o e e s . Peridia oblong, scattered, large; spores
orange, abundant.—Cooke M.F. t. 2, f . 27,28. Seem. Journ.ii.
p. 34. Fckl. exs. no. 288. MScidium pini. Eng. FI. v. p. 374. Grev.
t. 7. Moug. exs. no. 186. Rav. exs. i. no. 93.
On leaves and young branches of Scoth fir. Summer.
(Fig. 219, a. nat size, I. magnified.)
1601. Fezidexmium e la tin um .
mium.”
Lh. “ Silver F ir Perider-
S p e r m o g o n e s .
P r o t o s p o e e s . Simple, immersed ; peridia elliptic, pallid ;
sporidia orange.—Kze. exs. no. 141. Seem. Journ. ii.p. 34. Cooke
M .F .p .190. Fckl. exs. no. 290.
On silver fir, altering both foliage and ramification. Not
common.
1602. Fezidexmium columnaxe.
Peridermium.”
A . k S. “ Columnar
S p e r m o g o n e s .
P r o t o s p o e e s . Simple, slender, naked, cylindrical, elongated,
lacerated at the apex, white ; spores orange.—A. ^ S. Consp.
121, t. 5,/. 4. Kze. exs. no. 10. Cooke M. F. 2nd. ed.p. 223. Cooke
exs. no. 214.
On Picea. Sept. Near Torquay.
Gen. 184. iECIDIvm, Pers.
Peridium seldom
opening by a terminal mouth,
surrounded by a fringe of recurved
teeth, or when short
bursting irregularly. Spores disposed
in chains. Spermogonia
on tbe same or tbe opposite surface,
clustered or scattered, central
or intermixed.—(Fig. 220.)
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