MILDEWS, RUSTS AND SMUTS 
141 
compact, dusky ; spores club-shaped, tip mucli thickened, 
rounded, or more or less narrowed, slightly constricted at 
the septum, base narrowed, smooth, brown, 45—So x 18^—• 
28 (jl, pedicel colourless, persistent, about as long as the spore. 
S^m. Uredo oblongata, Grev. 
On Luzula campestris, L. pilosa, and L. maxima. Britain, 
and Europe generally. 
CYPERACEAE 
CAREX 
Pueeinia caricis, Rebent.; Plowr., Ured., p. 169. 
Pycnidia. In minute clusters, honey-colour. 
Aecidia. On the under surface of the leaves, or on the 
stem, on yellowish-brown or reddish-purple spots, which 
are often elongated and large, on the stem, and often causing 
distortion of the stem and leafstalks, cup-shaped, edge 
recurved, torn, white ; spores angularly globose, warted, 
orange, 16—26 x 15—20 p. 
Uredospores. Sori on both sides of the leaves, generally 
most abundant on the under surface, scattered, minute, 
oblong, pale brown ; spores subglobose or ovate, echinulate, 
yellowish-brown, 20—30 x 15—22 p. 
Teleidospores. Sori generally on the under surface of the 
leaf, scattered or arranged in lines, oblong or narrow and 
crowded into long, compact streaks, convex, blackish ; 
spores club-shaped, tip generally rounded, much thickened 
and darker, constricted at the septum, base narrowed, 
smooth, brown, 35-—66 X 14—23 p, pedicel tinged yellow, 
firm, about equal in length to the spore. 
Syn. Piiccinia caricina, Grev. 
Pueeinia striola, Link. 
Uredo earieis, Berk. 
Triehobasis eareina, Berk. 
The aecidia occur on Urtiea dioieaea, U. urens, and U. 
pilulifera. 
The uredospores and teleutospores are parasitic on Carex 
aeuta, C. ampullaeea, C. jiliformis, C. glauea, C. praeeox, 
C. hirta, C. riparia, C. paludlosa, C. gcodenoughii, and C. 
binervis. Britain, Europe, Japan, N. and S. America. 
Pueeinia dioicae, P. Magn., Plowr., Ured., p. 173. 
Pyenidia. Arranged in small, honey-coloured groups. 
Aeeidia. On the under surface of the leaves, spots some¬ 
what circular, yellowish or brownish, in clusters, cup- 
