Bb = DECADES OF BRITISH FUNGI. 
— P and Kze. Exs. n. 93. P. Artemisia, Fuckel, F. Rhen. 
350.—On Artemisia maritima. Swanscombe, Kent, Sep- 
ey Di us authors unite this species with Puccinia Com- 
positarum, but from them I dissent, not from any desire to augment 
the number of British species, but because I recognize in both its 
Puccinia-form, and what I believe to be its Uredo-form, a distinctness 
which entitles it to be separated from the numerous forms still asso- 
ciated under P. Compositarum. 
22. PUCCINIA ARUNDINACEA, Hedw. Amphigenous. Sori elongated, 
often confluent, emersed, convex, prominent. Sporidia brown, attenu- 
ated in both directions, constricted at the joints, apiculate, on long 
pedicels.—Hedw. fil. in Duby, Bot. Gall. ii. p. 889 ; Corda, Icones 
Fung. iv. t. 3. f. 30; Cooke, Fungi Brit. Exs. n. 25. P. graminis, 
var. arundinis, Cooke, Micro. Fung. p. 196.—On Arundo Phragmites. 
Common.—The true Puccinia graminis, Pers., occurs also on reeds, but 
the habit is very different, the sori are smaller and more numerous, and 
the spores more closely resemble those of the same species when grow- 
ing on the cereals than the spores of this species. Having found both 
species in the same locality, and even upon the same plant, still main- 
taining a distinct character, I am disposed to accept them as specifically 
different, in which view I do not thin kthat I am alone. 
UROMYCES coNcENTRICA, Lév. Ann. des Sc. Nat.; Cooke, Fung. 
Brit. Exs. n. 76. U. concentricus, Fuckel in Sched. U. Scille, 
Fuckel, Fungi Rhen. Exs. n. 401.  Uredo concentrica, Desmz. Ann. 
Wall, Herb. C. Belg. n. 675. Trichobasis Scillarum, Berk. Outl. p. 
332; Cooke, Micro. Fungi, p. 208; Index Fung. Brit. n. 1335. 
Uredo Scillarum, Grev. in Hook. Hos. Berk. Eng. Fl. v. part 2. p. 
376. Uredo Muscari, Duby, Bot. Gall. ii. p. 838? Puccinia Scilla- 
rum, Baxter, Exs. n. 40.—On leaves of Scilla nutans. Bala, N. Wales, 
May, 1865.—This species appears to me to be an exceedingly good 
Uromyces, and not by any means, either in habit, or form and colour 
of the spores, entitled to be regarded as a Trichobasis. 
23. UnoMYcEs Potyeont, Fuckel. Cauline. Sori elongated and 
. confluent, convex, surrounded by the remains of the ruptured epidermis. 
Sporidia subglobose or globose, smooth, yellowish-brown ; pedicels 
very long, thickened, hyaline, persistent.-—Fuckel, Fungi Rhen. Exs. 
voc eM. Capitularia Polygoni, Rabh. Bot. Zeit. 1851, p. 449; Herb. 
