Lo 
or 
THE USTILAGINEX OF NORTH AYRSHIRE, 
Genus Ustilago, Persoon. 
1. Ustilago longissima (Sow.) Tul.—Forming long parallel 
lines on the leaves of Glyceria fluitans ; frequent ; Largs, West 
Kilbride, Ardrossan, Stevenston. 
2. U. segetum (Bull.) Winter [U. carbo, Tul.].—Producing 
“smut” in ears of Avena sativa; very common; West Kilbride. 
In ears of T'riticwm vulgare ; frequent ; West Kilbride. 
3. U. caricis (Pers.) Winter [U. wrceolorwm, Tul. ].—In ovaries 
of Carex glauca, producing a firm black mass of spores, which 
finally protrudes from the affected florets; not common; near 
Seamill. 
4. U. utriculosa (Nees) Tul.—In ovaries of Polygonwm 
Hydropiper and P. Persicaria, destroying the internal floral 
organs, and finally protruding in pulverulent sooty masses from 
the perianth ; locally abundant ; Ardneil Bank. 
5. U. violacea (Pers.) Winter [U. antherarum, Fr. }.—In 
anthers of Lychnis Flos-cuculi, producing pulverulent masses of 
violet-coloured spores ; locally common; Ardneil Bay. 
Genus Tilletia, Tulasne. 
6. Tilletia tritici (Bjerk.) Winter [7. caries, Tul. |.—This 
species produces the wheat-disease commonly known as “bunt,” 
and is developed in the ovaries of Z'riticwm vulgare, filling the 
grains with an olive-black mass of spores which emits a fcetid and 
fishy odour ; apparently less common in Ayrshire than in many 
other parts of the country ; near Seamill, only once found. 
7. T. decipiens (Pers.) Winter [7. spherococca, F. von 
Waldheim ].—In ovaries of Agrostis vulgaris, causing the plant to 
assume the dwarfed condition krfown as “ variety pumila,” and 
filling the seed-grains with a dark mass of spores which emits a 
fishy odour when rubbed ; frequent ; near Seamill, Ardneil Bay, 
Gailes, and Barrassie. . 
8. T. strizformis (Westd.) Winter [Ustilago Salveii, B. & 
Br.].—In paralle! lines on the leaves and leaf-sheaths of Holcus 
“mollis ; common ; various places near West Kilbride. On leaves 
of Dactylis glomerata ; frequent ; near West Kilbride, 
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