CHRYSOMYXA 311 
Picea eacelsa in the North of Europe and has its uredo- and 
teleutospores on Ledum palustre, on which it produces witches’- 
brooms. See Klebahn, Wirts. Rost. p. 391. It is named by 
Tranzschel Chrysomyxa Woroniric. 
Quite recently also Chrysomyxa Rhododendri has been 
detected in Scotland by Mr D. A. Boyd. See Appendix. 
]. Chrysomyxa Empetri Schrit. 
Uredo Empetri Pers. ; Cooke, Handb. p. 527 ; Micr. Fung. p. 216. 
Chrysomyxa Empetri Schrét. Krypt. Flor. Schles. iii. 372. Plowr. 
Ured. p. 258. Sacc. Syll. vii. 762. Fischer, Ured. Schweiz, 
p. 557. 
Melampsoropsis Empetri Arthur, N. Amer. Fl. vii. 118. 
Uredospores. Sori hypophyllous, occasionally (according to 
Magnus) epiphyllous, small, 
roundish or elongated, some- 
times arranged in lines parallel 
to the midrib, covered by the 
raised epidermis, orange; spores 
in short chains, ellipsoid or 
polygonal, densely verrucose, 
26—35 x 18-25 wu, 30—35 x 
21—28 w (according to Fischer), 
25—30 x 17—25 (Plowright), __ ; ; 
"O6—OT 18-98 w (Artliutl; "ett wien, decile me 
wall rather thick, colourless;  “edo-sori, x10; b, uredospores 
x 600. 
contents orange. 
On Empetrum nigrum. Uncommon; North Wales, ete. 
May—October. Often in small quantity, and very inconspicuous 
except when fresh. (Fig. 235.) 
This fungus is considered to be a Chrysomywxa because the uredospores 
are produced in chains. The teleutospores seem doubtfully to have been 
observed by Rostrup and Lagerheim, and might possibly be discovered in 
this country if looked for. This parasite also occurs on the same host in 
the northern half of North America, but there also no teleutospores have 
ever been seen. 
DistTRIBUTION : Europe, North America: 
