356 MELAMPSORA 
Lecythea Lini Berk. ; Cooke, Handb. p. 582 ; Micr. Fung. p. 222, 
pl 8, £ 165—%, 
Melampsora Lini Desi. Pl. Crypt. no. 2049. Plowr. Ured. p. 237. 
Sace. Syll. vii. 588. Fischer, Ured. Schweiz, p. 507. McAlpine, 
Rusts of Australia, p. 192, f. 236 and pl. I, f. 36. 
Spermogones 
Aicidiospores 
Uredospores. Sori amphigenous and on the stems, small, 
scattered, roundish or oblong, flatly pulvinate, subepidermal, 
(2at first covered by a parenchymatous peridium, Fischer), 
orange; spores roundish to ellipsoid, echinulate, orange-yellow, 
16—24 x 12—17 yu; paraphyses not numerous, hyaline, strongly 
capitate, much thickened above, 20—25 pw diam. 
} See below. 
Fig. 266. M. Lini. a, teleutospores; 6, plan of same; ve, paraphysis 
and two uredospores. On L. catharticum. 
Teleutospores. Sori similar, but confluent, chiefly on the 
stems, subepidermal, reddish-brown, at length black and shining; 
spores prismatic, 35—60 x 7—10 yp; epispore thin, yellowish- 
brown, rather thickened above and darker. 
On Linum catharticum. June—October. Not uncommon. 
(Fig. 266.) 
Forms of Melampsora Lint occur widely on many species of Linwm and 
_have usually been regarded as identical. That which often acts as a very 
destructive parasite wherever the common Flax is cultivated has cousider- 
ably wider teleutospores (17—20,p, McAlpine) and attempts to infect 
L. usitatissemum from L. catharticum have uniformly failed ; it is therefore 
considered by some as a biological race or even species=.JJelampsora 
liniperda Kornicke (Centralbl. f. Bakter. 1911, 2. xxxii. 278). Teleuto- 
spores of this have been described as much as 80 long. Fromme (1912) 
has recently described spermogones and ecidia to this form on cultivated 
