94 British Uredinee and Ustilaginee. 
siderable period of soaking in water. The germ-tube we 
larger than in any of the other species of Urocystis tt 
germination of which I have watched; the promyceli 
spores were also not only larger, but more numerous. 
counted as many as eight on some of the promycelia (Pla' 
VII. Figs. 34, 35). 
U. anemones——Von Waldheim * points out that unle: 
the promycelium grows in the air no spore-formatic 
takes place. At its end it divides into three or for 
branches, which become spores. They are elongated, ova 
and generally wider at their upper end. In length, the 
measure from 10 to 14"; and in breadth, from 3 to 3°5, 
They become vacuolate, and enlarge in size till they ofte 
measure 22 by 4u. After several hours’ (forty-eight an 
more) immersion in water, in November and December, 
found the teleutospores germinated. The promycelial spore 
were of the same size and form as described by Von Walc 
heim (Plate VII. Fig. 31); I also observed they becam 
vacuolate when old (Figs, 32, 33). The promycelial spore 
were applied to the foliage of Ranunculus repens, in tw 
experimental cultures, on December 12, 1884. No chang 
was observed in the plants until February, when it wa 
noted that they showed signs of the formation of spore 
beds. On February 11 in ome experiment, and on th 
22nd in the second, spores were developed. This is on 
of the few species in which mycelium is localized, and th 
infection of the host-plant occurs at the same place < 
which the teleutospores are subsequently formed. 
U. viole—The spore-balls generally produce only on 
promycelium, which bears at the end a cluster of five c 
six fusiform spores. If the promycelium remain shor 
spores are produced ; but if it grow to any great lengtl 
either no spores at all are formed or only small ones. C 
* Waldheim, /oc. cit. 
