242 BOTANICAL GAZETTE. 
On leaves and petioles of Adgra Moschatellina, L. 
Decorah, Iowa. Europe. 
The only American specimens which I have received were collected by Mr. 
E. W. Holway. The fungus is, I think, without doubt the same as that de- 
scribed by Schroeter. Mr. Holway’s specimens, however, showed gen nee 
formity in the size and shape of the spores, which were distinctly elliptical, 
whereas Schroeter describes them as very variable. The galls differ from those 
of the last named species in that the host-cell enlarges so as to occupy a great 
part of the thickness of the leaf, but does not project much above the Rr 
and is there only loosely covered by the neighboring cells. Occasionally 
parasite develops in a subepidermal cell, in which case there is but little swell- 
ing of the leaf. 
8. §. aurEuM Schroeter. 
Beit. zur Biol. i, part 1, p. 40, Pl. 3, f. 8-12. - 
Spots golden yellow often bordered with red, galls hemi- 
spherical, resting spores spherical, about .10-.20mm., epispore 
brown, smooth. 
On leaves and stalks of Lysimachia quadrifolia, L. 
Granville, Mass. Europe. ‘ 
In Europe this species grows upon L, nummularia, but I haye searched in 
vain for it upon that host near Cambridge. The specimens from Granville 
were collected by Mr. A. B. Seymour. The galls are thickly scattered over the 
leaves, but are of small size. The host-cell is usually spherical and the sur 
rounding cells form rather a thick layer, except at the top of the gall, where 
there is a depression, at the base of which the host-cell is exposed. e rest 
ing spores are large for the genus, as shown by our own as well as Europea? 
specimens, 
9. S. Myosorrpis, Kuehn. var. PorentiiL, Schroeter. 
Beit. zur Biol. i, part 1, p. 48. 
Bull. Bussey Inst. ii, p. 224, 229, Ils 
Spots glandular, deep red, often densely aggregated, 28 
formed of swollen, externally projecting epidermal cells. resting 
spores globose, .07-.12mm. in diameter, epispore dark brow?. 
On leaves and petioles of 
Jamaica Plain, Mass, E 
An easily reco 
~ 
Potentilla Canadensis, 1. 
urope. 
gnized but not very common species, which closely —— 
the epidermal deformities placed in the old genus Erineum. The typical ati 
is found on Borraginaceer in Europe, but our form is precisely that which gf 
on P. argentea, in Europe. To the naked eye the leaves attacked seem ie 
spotted with shining deep red glands, which are sometimes so abundant a8 a 
ly to cover the surface. When young the glands seem to have a pores . 
in the center, and when old they collapse and become cup-shaped. The uae 
are nothing but the epidermal cells attacked by the parasite, which cans 
them to swell into oval or obovate sacks, whose contents become deep red. 
