402 BRITISH DISCOMYCETES. 
No. 2232; Gill, *Champ.,” p. 201. Qidium bullatum 
—B. and Br, “Jour. Hort. Soe,” ix. p. 51, with 
fig. Taphrina bullata—Tul., “ Ann. Se. Nat.,” ser. 5, 
vol. v. p. 127; Johanson, “Vet. Ac. Handl,” 42, p. 33. 
Exoascus bullatus—Fck1, “Symb. Myco.,” nacht. ii. p. 49 ; 
Sadebeck, l. e. 
Exs.—F kl, “F. Bh.,” 2551; Thum., “Fung. Aus,” 
972 and 1056. 
On living pear-leaves. It also occurs on Crategus 
Oxycanthus, and C. monogyna. April and May. 
The asci.are 30—87 x 8u; the sporidia 4:bu (Sade- 
beck, J. ¢.). Asci 15—25 x 10u (Cooke, l. c.). 
Name—Bullata, a blister ; blistered. 
Shrewsbury ! 
(b) Asct not furnished with a stem-cell. 
4, Ascomyces Potentille. (Farlow.) 
Decolorizing (to pale yellow-green) the branches and 
leaves, rendering the branches several times thicker than 
their natural size; asci clavate, rounded or truncate at 
the summit, attenuated below into a slender, non-septate 
stem, continuous with the mycelium, which spreads 
through the intercellular spaces of the epidermis ; sporidia 
8, oblong-elliptic, 5—8 X 4. 
Exoascus deformans, var. Potentillee—Farlow, “ Proce. 
Am. Ac. A. and &.,” xviii. (1883), p. 84. Zaphrina 
Tormentillee—Rost., “ Bot. Tid.,” ser. 3, vol. iv. (1884-— 
1885), p. 289; Johanson, “ Vet. Ac. Handl.,” 42 (1885), 
p. 29, t. 1, f. 2. 
On Potentilla Tormentilla, Scop. 
The asci in the Scottish specimen are truncate or 
rounded at the summit, and attenuated downwards more 
or less equally to a slender stem-like base, arising 
directly from the branching hyphe beneath the cuticle, 
30 to 50u high, 7 to 94 in the broadest part, and 2u in 
the narrowest part. The sporidia are confined to the 
broad upper half of the ascus, elliptic, and (as I measure 
them) 4—5 x 2—2-5u. 
