410 Transactions. 
the stigmas at the time of pollination, where they germinate and produce 
a probasidium, which develops immediately into an infection hypha ; this 
penetrates the style and enters the cells of the developing ovary, where a 
inflorescence, when they penetrate to the developing 
varies. These they convert—together with the developing ovules—into 
mass of mycelium, which later produces the spores. 
The significance of this life-history, from the viewpoint of the farmer, is 
that the resting mycelium is embedded in the tissues of the grain, where 
it cannot be reached by fungicides; consequently the disease cannot be 
controlled by the usual steeping methods. Freeman and Johnson (1909 
claim to have successfully combated this smut by means of Jensen's 
modified hot-water treatment (see p. 400). : 
9. Ustilago striaeformis (Westendorp) Niessl. (Text-fig. 7, and Plate 46, 
fig. 2.) 
Niessl, Hedw., vol. 15, р. 1, 1876. 
Uredo striaeformis Westnd., Acad. Roy. Belgique, Bull. 18, ser. 2, p. 406, 1852. 
Tilletia De Baryana Fisch. v. Waldh., in Rabh. Fungi Eur., No. 1097, 1866. 
T. Milii Fel., Symb. Myc., vol. 1, p. 40, 1869. T. striaeformis Oud., Bot. 
. vol. 36 
Proc. Roy. Soc. Vic., n.s., vol. 7, p. 220, 1894. М 
Bull. Torrey Cl, vol. 22, p. 57, 1895. Tilletia Airae-caespitosae Lin 
Soc. pro Fauna et Flora Fennica, vol. 26, p. 15, 1904.5 
brown, 1-1-5 mmm. 
osts :— 
Dactylis glomerata L. In leaves and sheaths. Herb. No. 265. 
Cluny, Turakina (Wellington), 210m., G. Н. C. 2 Jan., 1921. 
Holcus lanatus L. In leaves. Herb. No. 1276. Ettrick (Otago), 
m. R. B. Tennent! 10 Feb., 1921. Karori (Wellington), 
, 1923. 
species is readily recognized by the manner in which the infected 
leaves become shredded, tearing occurring along the linear sori. Infected 
plants are usually stunted, and not infrequently killed outright. 
_ Germination.— Osner (1916) has well illustrated the method of Bor 
mination. A short probasidium is produced, and this grows directly into 
an infection hypha ; no conidia are produced 
