200 PUCCINIA 
there is some oversight here, for Dietel obtained the wredo by sowing the 
zcidiospores from £. tetragonum on that plant ; he also suggests that the 
form on £. tetragonum is biologically distinct from that on E. hirsutum, 
since on the latter he obtained no result. 
DistRIBUTION: Central and Northern Europe, Nova Zembla, 
Siberia, North America. 
72. Puccinia Epilobii DC. 
Puccinia Epilobit DC. Flor. fr. vi. 61. Cooke, Handb. p. 506; Micr. 
Fung. p. 211. Plowr. Ured. p. 202. Sydow, Monogr. i. 427. 
Fischer, Ured. Schweiz, p. 155, f. 120. 
Teleutospores. Sori hypophyllous, scattered or rather crowded, 
often uniformly distributed over the whole 
surface of the leaf, rarely confluent, sur- 
rounded by the torn epidermis, pulverulent, 
reddish-brown; spores ellipsoid, oblong or 
pyriform, rounded at both ends, hardly 
thickened above, but with a minute papilla, 
F .,.. much constricted, minutely verruculose, 
ee clear brown, 27—48 x 1625 ps; pedicels 
hyaline, 10—16 w long. 
On Epilobium palustre. Rare. May—August. A  sub- 
alpine and arctic species. (Fig. 148.) 
Distinguished from P. pulverulenta not only by its spores and the 
absence of the zcidium- and uredo-stages, but also by the smaller teleuto- 
sori which are scattered pretty uniformly over the leaf-surface. The 
mycelium seems to be perennial; it permeates the whole plant, and 
somewhat deforms the shoots, making the leaves smaller and thicker, 
The warts of the epispore are sometimes hardly perceptible, but can 
usually be seen if the spore is squeezed in the way recommended, see 
p. 83. 
DistTRIBUTION : Central and Northern Europe. 
73. Puccinia Viole DC. 
Aicidiwm Violae Schum. Pl. Sill. ii, 224. Cooke, Handb, p. 548; 
Micr. Fung. p. 198. 
Trichobasis Violarum Lév. ; Cooke, Micr, Fung. p. 226. 
