624 
VIII. FUNGI. 
[Jsteroma. 
Northern Island, Colenso, and Lord Auckland’s group, J. D. H., in both places 
on leaves of Panax simplex. This is perhaps only a rudimentary state of a Collema. 
45. GYMNOSPORIUM, Corda. 
Pulverulent Fungi, forming strata or vegetable substances. Spores super- 
ficial, conglobate, simple, arising directly from the matrix, smooth. 
Usually found on grass- stems. 
1. G. culmigenum, Berk, in FI. N. Z. ii. 197. Spots in. and up- 
wards long, half as broad, deep black. Spores elliptic or subglobose, with a 
thin epispore. 
Northern Island : on dead grass, Colenso. 
46. PUCCINIA, Persoon. 
Minute mildews. Spores crowded in patches, breaking through the epider- 
mis of the plant they infest, and growing from a mycelium, 1-septate. 
The mildews are the most common and destructive of Fungi, and are found in all parts of 
the world. 
1. P. comp acta, Berk, in FI. N. Z. ii. 195. Patches orbicular, pale, of 
various sizes. Sori solitary and crowded, depressed ; mass of spores compact, 
spongy. Spores elongate, subapiculate, g/o~ 2 lro long, often oblique ; 
nucleus distinct. 
Southern Islaud : on leaves of Myosotis capitata, Lyall. 
2. P. graminis, Persoon ; — Berk, in FI. N. Z. ii. 195. Spots pale, dif- 
fuse ; sori linear, confluent. Sporidia at length black. 
Probably abundant on corn and all grasses : on Triticum , Colenso. 
47. UREDO, Leveille. 
Minute epiphyllous Fungi. Receptacle formed of several superpose 
irregular cells, each containing a single simple sessile or very shortly stalked 
spore. 
A large genus of Fungi, inhabiting all parts of the world, and very destructive of vege- 
table tissues. 
1. U. antarctica, BerTc. in FI. Antarct. 170. t. 68./. 2. Spots small, 
opposite on both sides the leaf, rounded, purplish, pale beneath. Sori bul- 
late. Spores large, smooth, broadly obovate, brown, with a central oily 
globule, very shortly stalked. 
Campbell’s Island : on leaves of Luzvla crinita, J. D. PI. 
48. UROMYCES, Leveille. 
Habit and characters of Uredo, but receptacle formed of a single layer of 
cells ; spores stalked. 
1. U. scariosa. Berk, in FI. N. Z. ii. 195. Spots scattered, distinct. 
