226 PUCCINIA 
as regards Pol. viviparum Klebahn expresses doubts, but Semadeni was able 
successfully to infect that species with uredospores from Pol. Bistorta, The 
form on Pol. viviparum is here kept provisionally distinct, since the 
eecidium on Angelica has not been found in Britain. 
‘Of.the second group, P. mammillata, there are two biological races— 
(1) P. Mei-mammillata Sernadeni, on Meum, and (2) P. Angelicae-mam- 
millata Klebahn, on Angelica. Neither of these has been found in 
Britain. All the four of these are closely allied ; in Sydows’ Monographia 
it is suggested that possibly in all these cases the acidium on the 
Umbellifer is merely facultative and the Puccinia can maintain itself 
without that aid. 
96. Puccinia Polygoni-vivipari Karst. 
Puccinia Bistortae DC. ; Cooke, Grevillea, ii, 161 ; Mier. Fung. p. 204 
pp. Plowr. Ured. p. 192. Sace, Syll. vii. 688. Sydow, Monogr. 
i. 571 p.p. 
P. Polygoni-vivipart Karst. Enum. Fung. Lapp. p. 221. Fischer, 
Ured. Schweiz, p. 100, f. 76 (%). 
Uredospores. Sori hypophyllous, scattered, small, roundish, 
cinnamon-brown, girt by the erect epidermis; spores roundish 
to ellipsoid, finely echinulate, pale-brown, 20—23 x.16—17 p. 
Teleutospores. Sori similar, but blackish-brown; spores 
elliptical to obovate-oblong, rounded and not thickened above, 
A506 
\V 
Fig. 174. P. Polygoni-vivipari. a, two teleutospores from Mar Lodge; 
b, uredo- and teleutospore from a specimen issued by Fuckel, Symb. Myc. 
57; both on Polygonum viviparum. 
hardly or not at all constricted, rounded or slightly tapering 
below, smooth, brown, 20—30 x 15—20; epispore very thin and 
translucent; no papilla on the germ-pores; pedicels deciduous, 
short. 
On Polygonum viparum. Very rare. Near Mar Lodge, 
August, 1822 (Dr Greville). Braemar, August, 1882 (Prof. 
Trail). (Fig. 174.) 
This species is closely allied to P. Conopodii-Bistortae (q. v.), but in 
the absence of all biological information is best kept distinct. I have — 
