í
if
l i X ,
í r
C l a s s a n d O k d e i i , C R Y P T O G AM IA F U N G I , ¿ m w — N a t . O e d . GASTROMYCl,
Gjot.— E P IP H Y TÆ , Link.
G E N E R IC C H A R A C T E R .
Peridium verum 0. Sporidia uni- aut imdtiloculata, pedicellata, pedicellù fixa ,
et in cæspitulis foliis vivis parasiticis, aggregata. Epidermis foliorum peridio
simillima.
True peridium 0. Sporidia, one or many-celled, pedicellate, fixed by the
pedicel, and growing in minute clusters or tufts on living leaves. The
epidermis bearing a strong resemblance to a peridium.
S P E C IF IC c h a r a c t e r .
P u c c in ia Potentillæ; hypophylla, sparsa, nigra ; sporidiis cylindricis, 3-i-lo-
culatis, obtusis; pedicello albofliformi.
P. on the lower surface of the leaf, scattered, black ; sporidia cylindrical,
3-4-celled, obtuse ; pedicel white, filiform.
P u c c in ia PotentiUæ, Pers. Syn. Fung. p. 22Q.—Alb. et Schnein. Conspect.
Fung. p. 133— De Cand. Syn. Fl. Call. p. 44.—Fl, Franç. v. 6. p. 54.—
Cray’s Nat. Arr. v. 1. p. 543.
U r e d o o b t u s a , Strauss, in Annal. Soc. Wetterav. v . 2 . p. 107-
H a b . On the inferior surface of the leaves of Potentilla Fragaria, argentea,
verna, and Tormentilla {Tormentilla erecta, Auct.) Summer and Autumn.
My specimens were gathered at Rosslyn.
Black, tufted, scattered, small, often growing along with the orange Uredo
Potentilloe. Sporidia mostly cylindrical, very obtuse at the apex, 3-4-ceUed,
very rarely 5-eelled, reddish under the microscope, and contracted at the
dissepiments. Pedicel filiform, pale, hyaline.
This species approaches most nearly to P. Rosce, already
figured in this work, and has also considerable affinity with P.
Rubi, but is essentially different from both, in being simply
obtuse at the apex of tbe sporidia, the others being mucronate.
The pedicel is also filiform to the base, instead of being more