ON JUNCACEA 123 
is to remove carefully and burn all diseased leaves before they mature 
their spores. 
The fungus is stated to have attacked the foliage of the host for three 
successive seasons, completely destroying it, and although for the first two 
seasons it did not attack other species of Colchicum growing near, during 
the third season it spread to C. autumnale and C. bavaricum. 
35. Uromyces Junci Tul. 
icidium zonale Duby, Bot. Gall. ii. 906. Cooke, Grevillea, xiv. 39. 
Uromyces Junci Tul. Ann. Sci. Nat. ser. 4, ii. 146. Cooke, Grevillea, 
vii. 1389; Micr. Fung. p. 213. Plowr. Ured. p. 132 ; Grevillea, xi. 
52. Sacc. Syll. vii. 541. Sydow, Monogr. ii. 287. Fischer, Ured. 
Schweiz, p. 57, f. 43, 
Nigredo Junct Arthur, N. Amer. FI. vii. 238. 
Spermogones. Usually epiphyllous. 
Aicidiospores. Aicidia hypophyllous, seated on spots which 
are zoned with yellow and purple, in 
dense circinate clusters 2—5 mm. 
wide, cup-shaped, yellowish-white, 
with a torn revolute margin; spores 
densely and minutely verruculose, 
transparent-yellowish, 17—21 p. 
Uredospores. Sori scattered, 
roundish or oblong, up to 1 mm. 
long, surrounded by the cleft epi- _ 
dermis, pulverulent, brown; spores Poe oo ieee 
globose to ellipsoid, faintly echinu- 
late, yellowish-brown, 20—28 x 16—22 yw, with two equatorial 
germ-pores. 
Teleutospores. Sori amphigenous or on the culms, scattered 
or occasionally aggregated, similar to the uredo-sori, but darker ; 
spores oblong-ovate to clavate, rounded or conical above and 
much thickened (up to 14), attenuated below, smooth, dark- 
brown, 24—42 x 12-18 w; pedicels thick, persistent, brownish, 
as much as 60 yu long. 
Aieidia on Pulicaria dysenterica, May—July; uredo- and 
teleutospores on Juncus obtusiflorus, from July onwards, lasting 
through the winter on the dead culms. Not common. (Fig. 75.) 
