Tilletia. 191 



Hordeum, 



54. Tilletia hordei Koeni, 



Kocrnicke Hcdw. XVI., p. 30 (1877). 

 Sacc. Syll. VII., p. 484 (1888). 

 Sori in ovaries, wliich are at first dark-green in colour, ultimately black, 

 concealed by the glumes, foetid, causing the spike to have a slight 

 club-head appearance. 



Spores black in the mass, brownish individually, globose to sub- 

 globose, occasionally ellipsoid, 19-20 /it diam. or 19-22 x 17-19 n ; 

 epispore with raised ridges forming a network. 

 On Hordeum murinum L. — Barley grass. 



South Australia — Orroroo District in the far north, Oct., 1909 



(Summers). 

 New South Wales— Coolac near Gundagi, Nov., 1908 (Sullivan). 

 The odour is somewhat similar to that of Stinking Smut or Bunt of wheat, 

 but the spores are larger and more regular in shape. The wall of the ovary 

 still retains its texture and green colouring matter while enclosing the spores, 

 but blackens as the spores mature. 



The smut-ball is shorter and stouter than the healthy seed. 

 This species has only hitherto been recorded from Persia. 

 Germination. — This was tried in a variety of ways with fresh spores and spores 

 a year old, but only in one instance did it occur with the fresh spores. Spores 

 were floated on water, immersed in water, placed in hanging drop, on plaster of 

 paris kept moist, and on damp blotting-paper. Nutritive solutions were also 

 tried, such as sugar, ammonium nitrate, and infusion of wheat. The spores 

 were carefully watched for about six weeks, but not the slightest attempt at 

 germination was observed. However, on the 43rd day, the fresh spores, 

 -dusted on a slide and placed over a jar of water, were found to be germinating 

 and producing the typical spores of Tilletia. 



. (Plate LVI.) 



Deyeuxia. 

 55. Tilletia inolens AlcAlp. 



McAlpine, Agr. Gaz. N.S.W., VII., p. 154 (189G). 

 Massee, Bull. Kew, p. 152 (1899). 



Sori produced in inflorescence and on upper leaves, black, pulveiuleiit. 

 without smell. 



Hyphae septate, hyaline 4-5 /t broad. 



Spores regularly globose, dark-brown, 30-39 /< diam., average 

 34 fj. ; epispore covered with very coarse warts which project like so 

 many lilunt teeth, and the whole is enveloped by a fine hyaline 

 membrane. The projecting teeth covered by the enveloping mem- 

 l)rane, give the appearance of a pale yellowish or yellowish-brown 

 border round the spore itself, 3-6 /.i broad. Between the warts 

 there are very minute projections on the epispore. 

 On Deijeuxia forsterl Kunth. 



Victoria — Ardmona, Nov., 1894 (Robinson). 



