344 



MELA.MI'SOKA 



Spermogones. Hardly projecting, flat, mostly under the 

 stomata. 



JEcidiospores. Cseoraata irregular in outline, clustered or 

 circinate oe large pale-yellowish spots, often 

 confluent, 1—2 mm. diam. ; bright orange- 

 yellow: spores roundish-polygonal, 11 — 20 x 

 11 — 15 jx\ epispore very thin, delicately 

 warted. 



Uredospores. Sori hypophyllous, minute, 

 deep-orange, causing yellow spots on the 

 upper side: spores more or less round, orange, 

 echmulate, 13 — 17x12 — 14 /x; paraphyses 

 mostly capitate, with thin pedicels, 40 — 

 70 xlG— 20 fi. 



Teleutospores. Sori hypophyllous or a 

 few on the upper side, subepidermal, small, 

 dark-brown ; spores prismatic, rounded at 

 both ends, 16 — 48x7 — 14 /a: epispore clear-brown, uniformly 

 thin (about 1 p), without any evident germ-pore. 



< 'n'omata on IAstera ovata, Orchis latifolia, 0. unirnlata, 

 May, June: uredo- and teleutospores on Salix aurita, S. repens. 

 Not common. (Fig. 259.) 



The cseorna is also recorded on Listera cordata, Goodyera repens, and 

 Gymnadenia conopsea, but no experimental proof of the connection seems 

 to be forthcoming in the case of these species, though both Plowright and 

 Klebahn have demonstrated it for the other species. The teleutospores 

 germinate, as usual, after the winters rest. Soppitt found the cajoma on 

 0. maculata and the teleutospores on S. repens growing together near 

 Southport. — The secidium of Puecinia Orchidearum-Pkalaridis can be 

 readily distinguished from the ca?oma of this species by its evident 

 peridium and the regularity of its form. 



Fig.259. M.Orrhidi- 

 repentis. Caeoma 

 on leaf of Listera 

 oratit. from one of 

 Plowright's cul- 

 tures (reduci d). 



Melampsora Allii-fragilis Kleb. 



Uredo Alliorum DC. ; Cooke, Micr. Fung. p. 217 p.p. 

 Cm-oiiw Alliorum Link; Plowr. Fred. p. 261 p.p. 

 Melampsora Vitellinae Plowr. I.e. p. 240 p.p. 



M. Allii-fragilis Kleb. in Pringsh. Jahrb. f. Wissensch. Bot. 1901, 

 xxxv. 671. Fischer, Ured. Schweiz, p. 481. 



