36 A SYNOPSIS OF THE BRITISH JECIDIACEI. 
in roundish clusters ; peridia oblong ; sporidia bright-orange.— Cooke, 
l.c. m. 1420; Grev Sc. Crypt. Fl. 4. 4; Berk. Outl. p. 3315. Eng. 
Flora, v. pt. 2. p. 311.—On Thalictrum alpinum. Not uncommon in 
Scotland. 
15. Æcidium crassum, Pers. (Buckthorn ZEcidium) ; spots yellow- 
brown, subiculum thickened); peridia crowded into a roundish heap, at 
first globose, yellow, at length open ; sporidia orange,—Cooke, J. c. 2. 
21; Pers. Syn. p. 208 ; Ic. et Descr. t..10.f.1, 2; Gray’s Nat. Arr. 
p. 535 ; Berk. Outl. p. 337; Eng. Flora, v. pt. 2. p. 313 ; Æ: Rhamni, 
Purt.. Midl. Fl. ii. 2..1538.—On Rhamnus. catharticus and R. Fran- 
gula. Common, 
16. ZEcidiun. Perielymeni, DC. (Honeysuckle /Ecidium) ; spots va- ` 
riegated, yellow and. brown, subieulum thickened ; peridia . sometimes 
elongated, in roundish or effused heaps; sporidia orange.— Cooke, 1. c. 
n. 1422; DC. Fl. Fr.ii. p. 591; Gray’s Nat. Arr. p. 531; Grev. Eh 
Ed. p. 445 ; Johnst, Fl. Berw. p. 206 ; Berk. Outl. p. 331; Eng. Fl. v. 
pt. 2. p. 370.—On the under surface of honeysuckle leaves. Not com- 
mon.. June to August. 
B. Poculiforme. 
AT. ZEcidium Calthe, Grev. (Marsh Marigold ZEcidium). ; aggregate ; 
peridia somewhat campanulate, with. numerous minute marginal teeth ; 
sporidia bright-orange, subglobose or oval.— Cooke, 1. c. n. 1423 ;, Grev. 
Fl. Ed. p. 446 ; Berk. Oull. p. 3815 Eng. Fl. v. pt. 2. p. 871.—On 
leaves and petioles of Caltha palustris, margin of peridia pale and 
brittle. Rare... Spring. 
18. Æcidium Ranunculacearum, DC. (Crowfoot AEcidium) ; spots 
obliterated, subiculum thickened ; peridia in irregular heaps, densely 
crowded together; sporidia orange.—Cooke, 1. e.n. 1424 ; DC. Fi. 
Fr. vi. p. 915. Grev. Fl. Ed. 446 ; Johnst. Fl. Berw. p. 205; Berk. 
Outl. p. 331 ; Eng. Flora, v. pt. 2. p. 370. JR. Ranunculi, Sow. £. 397. 
J. 25 Gray's. Nat. Arr. p. 535, Æ. confertum, Gray's Nat. Arr. 
p. 535; Grev. Fl. Ed. 446; Johust, Fl. Berw. p. 205. 7E. Ficarie, 
Purt. Midl. Fl. p. 333. Æ. Clematidis, Gray’s Nat. Arr. p. 535.—On 
leaves of. various Ranunculacee ; very common on A. Ficaria, not un- 
common on , repens, more rarely on R. acris and R. bulbosus. 
Spring. 
19. Aicidium Galii, Pers. (Bedstraw ZEcidium) ; spots linear or 
oblong, obscurely brown ; peridia. scattered, rarely aggregate, dentate, 
