ON GRAMINE.E 



257 



120. Puccinia Festucae Plowr. 



Mcidivm Periclgmeni Schum. Enum. PI. Sail. ii. -2-2'). Cooke, Micr. 



Fung. p. 196. Plowr. Ured. p. 264. 

 JE. crassum var. Pen'cli/meni Cooke, Handb. p. 539. 

 Puccinia Festucae Plowr. Gard. Chron. 1890, ii. 42, 139, and 1891, 



i. 460; Grevillea, xxi. 109. Sacc. Syll. xi. 194. Sydow, Monogr. 



i. 752. Fischer, Ured. Schweiz, p. 377, f. 272.- McAlpine, Rusts 



of Australia, p. 119, f. 13. 



Spermogones. In .small clusters, honey-coloured. 



JEcidiospores. ^Ecidia hypophyllous, on round yellow or 

 brownish spots, in roundish clusters 2 — 5 mm. diam., shortly 

 cylindrical, whitish-yellow, with recurved irregularly torn 

 margin; spores delicately verruculose, orange, 16 — 27 /x. 



Uredospores. Sori epiphyllous, scattered, minute, oblong, 

 yellow ; spores globose to ellipsoid, echinulate, yellow-brown. 

 22 — 30^, without paraphyses. 



Fig. 196. P. Festucae. Teleutospores and mesospore. 



Teleutospores. Sori hypophyllous, minute, scattered, oblong 

 or sublinear, black-brown; spores clavate-oblong, crowned at the 

 summit, with four to six curved and sometimes bifid processes, 

 gently constricted, attenuated downwards, smooth, pale-brown, 

 40 — 60 x 15 — 23 ft; pedicels brown, persistent, 15 — 25 //, long: 

 a few mesospores intermixed. 



iEcidia on leaves of Lonicera Periclymenum, June — August,, 

 not uncommon; uredo-and teleutospores on Festuca duriuscula, 

 F. ovina, August — October, not common or at least rarely 

 observed. (Fig. 196.) 



It was Plowright who first, in 1890 (after twenty-eight unsuccessful 

 trials), proved that the well-known secidium on Lonicera was connected. 



G. U. 



17 



