The Natural History of Plants, Their Forms, Growth Reproduction, And Distribution; From the German of Anton Kerner Von Marilaun
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The swollen end of an aerial hypha is densely set with cylindrical cells, from which the conidia are abstricted one after another. Penicillivmi crusta- ceum (figs. 193* and 193') is very similar, but here the conidia are borne on a hypha which branches near its extremity like a compound umbel. Another form, Ewrotium, is shown in fig. 385 ', p. 679. The ascus-fruits of these Moulds are not very conspicuous, nor are they always very plentifully developed. They arise on the mycelium after the coni...dial stage is over, and when ripe are about the size of small shot. They commence by the entwining of certain hyphal branches {Peni- ciUivm, fig. 193^, p. 18; Eurotium, fig. 385 ^ p. 679) which have been regarded as representing male and female organs (cf. p. 60). That fertilization takes place is strenuously denied by many modem mycologists, and the sexual nature of the entwining hyphse is not universally recognized. Be this as it may, the result of the process in question (which also takes place in the Mildews) is the formation of a sinuous hypha, which becomes embedded in a dense cortical sheath which grows up from the mycelium close by the place of origin of the entwined hyphse.
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