34 Transactions. 
2. Aecidium Ranunculacearum De Candolle. (Text-fig. 103, and Plate 1, 
DC., Fl. Fr., vol. 6, p. 97, 1805. 
0. Spermogones amphigenous, crowded in small groups, mixed with the 
aecidia, immersed, honey-coloured. 
. Aecidia amphigenous and petiolicolous, crowded in scattered groups, 
which are seated on slightly inflated spots visible on the opposite surface, 
on leaves the groups are orbicular and up to 5 mmm. diam., on stems 
they are elliptical and up to 10mm. long; orange. Peridia cupulate, 
erect, slightly expanded, not revolute, brittle, white, finely lacerate. Spores 
polygonal, elliptical, or subglobose, 20-37 x 18-28 mm m.; epispore hyaline, 
closely and minutely verruculose, 1 mmm. thick, cell-contents pallid orange, 
gran 
Hosts :— 
Ranunculus depressus T. Kirk. On leaves and petioles. Herb. No. 81. 
Mount Guinevere (Canterbury), W. D. Reid! 15 Oct., 1919 
Ranunculus Lyallii Hook. f. Herb. No. 81. Waimakariri glaciers, 
T. Kirk! Jan., 1883. McKinnon's Pass (Otago), E. H. Atkin- 
er 16 Jan. 1920. CUR Cass (Canterbury) 650m 
W. D. Red! N. R. F 0 Jan., 1922. Punch-bowl Falls, 
Arthur's Pass (Соскы), 1 On E. H. Atkinson! 15 Nov., 
1922. 
Ranunculus nivicola Hook. Herb. No. 496. Mount Egmont (Tara- 
naki), 1,200-1,500 m., W. D. Reid/ N. R. Foy! 2 Jan., 1922. 
Ranunculus pachyrrhizus Hook. f. Herb. Te 372. Lake Harris 
(Otago), 1,100 m., W. D. Reid! 6 Мау, 1 
Ranunculus repens L. Herb. No. 81. Were (Wellington), 100 m., 
E. Н. Atkinson! G. Н. С. З Oct., 1919. Sandhills, Levi n (Wel- 
lington), 30 m., E. Н. Atkinson ! G.H.C. 14 Oct., 1922. 
Distribution: World-wide. 
With the exception of Ranunculus repens L. all the hosts are endemic. 
They are all confined to the mountain-ranges. R. insignis and R. geranii- 
foliis occurs in both Islands; R. nivicola is confined to the North Island, 
and А. Lyallii, R. pachyrrhizus, and R. depressus to the South Island. 
(Cheeseman, 1906, pp. 9-24.) 
The aecidium on R. repens may belong to the cycle of any one of several 
species—for example, Uromyces Dactylidis Otth, U. Poae Rab., and Puc- 
cinia Magnusiana Koern. As its connection with those species mentioned 
above which occur in New Zealand has not yet been worked out, it is 
retained here for the present. The forms on the several hosts discussed 
