ON IMPATIENS 205 
pale-yellowish, 16—22 x 1420, with 3—5 (usually four) 
germ-pores. 
Teleutospores. Sori similar, but chestnut-brown; spores 
ellipsoid to subclavate, with a colourless conical cap to each 
germ-pore, rounded or slightly attenuated at both ends, hardly 
constricted, smooth, pale-brownish, 25—38 x 12—22 w; pedicels 
hyaline, slender, short. 
{[AMcidia on Adoxa Moschatellina, April—June ;] uredo and 
teleutospores on Impatiens fulva, I. Noli-tangere, May, August— 
October. Very rare; Albury, Surrey, October, 1864 (Rev. L. 
Jenyns), Guildford (Rev. W. A. Vize), Shere (M. C. Cooke), 
Kew Gardens (G. Massee). (Fig. 152.) 
The teleutospores are at first produced in the same sori as the uredo- 
spores ; the ecidial stage is not recorded, probably because it has been 
confounded with the ecidium of P. albescens, from which it is distinguished, 
according to Bubék, by its gold-coloured spores. I do not think this 
distinction will hold good ; many of the specimens found in this country, 
which appear to be P. albescens, have golden-yellow spores. See under 
that species (p. 163). 
The description given above of the spermogones and ecidia is taken 
from Bubak, who showed (Centralbl. fiir Bakt. 2. xii. 413) that they could 
produce the other stages on Jmpatiens in about ten days. He also showed 
that the ecidium could be produced on the Adowa by over-wintered 
teleutospores ; the incubation period was as long as one month, probably 
because the mycelium first permeated the whole plant, from the leaf to 
the stem, before producing spores. Afterwards he proved, contrary to his 
former opinion, that the mycelium does not perennate in the rhizome, but 
fresh infection must take place each spring (cbed. xvi. 150). 
DisrrisuTion: Central and Northern Europe, North 
America, Japan. 
77. Puccinia Buxi DC. 
Puceinia Buxt DC. Flor. fr. vi. 60. Cooke, Handb. p. 508; Micr. 
Fung. p. 212. Plowr. Ured. p. 217. Sacc. Syll. vii. 688. Sydow, 
Monogr. i. 453. Fischer, Ured. Schweiz, p. 316, f. 228—30. 
Teleutospores. Sori amphigenous, on indefinite spots, scat- 
tered or confluent, hemispherical, pulvinate, hard, compact, 
soon naked, dark chestnut-brown or purplish-brown; spores 
