. Fl<;. •2V2.—Chri/somi/xa rhododmdi-i on Spruce. The needles are beset with aecidia; discoloured jiarts of them are shown black, the normally green being left white, (v. Tubeuf dpl.) Chr. abietis (Wallr.).i Needle-rust of spruce. This is parasitic (•11 the spruce (Picea cxcclsa), and is found on the Alps up to an elevation of over 1700 metres. About the beginning of May the hibernating teleutospores produce promycelia and sporidia. The latter germinate at once, and the germ-tubes make their way through the epidermis into young unfolding needles. The mycelium is well-developed and lives int
. Fl<;. •2V2.—Chri/somi/xa rhododmdi-i on Spruce. The needles are beset with aecidia; discoloured jiarts of them are shown black, the normally green being left white, (v. Tubeuf dpl.) Chr. abietis (Wallr.).i Needle-rust of spruce. This is parasitic (•11 the spruce (Picea cxcclsa), and is found on the Alps up to an elevation of over 1700 metres. About the beginning of May the hibernating teleutospores produce promycelia and sporidia. The latter germinate at once, and the germ-tubes make their way through the epidermis into young unfolding needles. The mycelium is well-developed and lives inter- cellularly, sending haustoria into the host-cells; it contains yellow oil-drops, so that by the end of June needles contain- ing it exhibit yellow-coloured stripes. For the remainder of the year reddish-yellow elongated teleutospore-cushions are ^ Reess, Botan. Zeitiutif, 1865; Die Ikostpilzfonnen cl. deulxrhen Conifireu, 1S69. Willkomm, Die mikrosropiwheu Feiude dcii Wa/des, 1868.
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Keywords: ., bookcentury1800, bookdecade1890, bookpublisherl, booksubjectfungi
