. Fifi. •241.—Witchen' Bi-oom oj Silver Fir (winter condition). The ncoillcs, with -•IioreH of Aicidium diUiamn, hiiTc fallen off, but tho normal folia(fo rouiiiins. (V. Tiiljciif phot.) negative geotropy of its twigs. The brooms not unfretpiently start from a marked l)asal swelling. 'I'hey may be fnund of all sizes, on young as well as (jld trees, on any part of ilu' liranch- system, anil in all localities where the tir occins (Kigs. 241 and 242). Tile aecitiia of .luiifiinn i/iifiiiinu are developed only on the deformed needles of the witches' brooms. These needles are produc(,'il anew each

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. Fifi. •241.—Witchen' Bi-oom oj Silver Fir (winter condition). The ncoillcs, with -•IioreH of Aicidium diUiamn, hiiTc fallen off, but tho normal folia(fo rouiiiins. (V. Tiiljciif phot.) negative geotropy of its twigs. The brooms not unfretpiently start from a marked l)asal swelling. 'I'hey may be fnund of all sizes, on young as well as (jld trees, on any part of ilu' liranch- system, anil in all localities where the tir occins (Kigs. 241 and 242). Tile aecitiia of .luiifiinn i/iifiiiinu are developed only on the deformed needles of the witches' brooms. These needles are produc(,'il anew each spring, live only onr -reason ami are cast ' I'lily/iDin-t J/nrfii/ii iuid A'/uiiniA (iili/Hj>ii> in | iiular iniiiin|mii\ iiiiker iiiitl liritig iiImhiI ilecay of tlu- wood.

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Keywords: ., bookcentury1800, bookdecade1890, booksubjectparasit, bookyear1897