. Fio. 167.—TilUlUi liitici. A, Twu spores genninatcd in moist air; a short promycclimn is dcvcloiicJ, nuil Ix-'ars a crown of conidia (sporidia), sevcnil of wliich have fused in pairs. Fushion of , gcrniination, and development of a secondary conidiiini, C, are also shown. S, Two spores gei-miuated in water with proniyeelia which till the water surface is re;iehed, where they form sporidia; the promycelia are .septate and the plasma i)a8ses over into the hui. Iti,;.-fdUtw tytttci. voiuiKer cells, (v. Tiibeuf del.) Stud-iii'i-iMut of U heat. of wheat with smut-grains i
. Fio. 167.—TilUlUi liitici. A, Twu spores genninatcd in moist air; a short promycclimn is dcvcloiicJ, nuil Ix-'ars a crown of conidia (sporidia), sevcnil of wliich have fused in pairs. Fushion of , gcrniination, and development of a secondary conidiiini, C, are also shown. S, Two spores gei-miuated in water with proniyeelia which till the water surface is re;iehed, where they form sporidia; the promycelia are .septate and the plasma i)a8ses over into the hui. Iti,;.-fdUtw tytttci. voiuiKer cells, (v. Tiibeuf del.) Stud-iii'i-iMut of U heat. of wheat with smut-grains indi- cated black. The isolated spike- let contains two smut-(^.iins, which, as Well as the isolated examples, show tissures in the original ovary wall. <tne smut- grain in section shows the in- terior filled with lilack spores, but the ovary wall still intact, (v. Tut)euf del.) ])ak'S. The spores, theiet'oic, do imi escujii' as (hisl mi iIh- ticld, Init remain in the heads and are garnered with the crop. Smutty ears are easily distinguishfd n the field by tiu'ir stiff erect position towards harvcst-tiiut', as inmpan'd with tbf more or less nodding healthy ears: their florets also lie more away from the axis of the ear, the ehalf-glumes are more spread
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectparasit, bookyear1897
