Handbook of practical botany : for the botanical laboratory and private student / by E. Strasburger ; edited from the German by W. Hillhouse ; revised by the author, and with many additional notes by author and editor.

  • Strasburger, Eduard, 1844-1912.
Date:
1889
Catalogue details

Licence: Public Domain Mark

Credit: Handbook of practical botany : for the botanical laboratory and private student / by E. Strasburger ; edited from the German by W. Hillhouse ; revised by the author, and with many additional notes by author and editor. Source: Wellcome Collection.

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    babl}^ one at tlie upper end. The basidia, however, are usually filled so thickly with contents at the apex that the identification of the nucleus in them is impossible. In the spores also, with the strono-est masrnification, a nucleus can be distino-uished with cer*;ainty for each.® To complete what we have already said, it may be added that besides the above-described fruiting branches, it is possible to rear upon Penicillium a second kind of fruiting body.^’ These arise in suitably managed culture en masse, have the size of small pin- heads, and a yellowish colour. In their interior, after longer period of rest, asci are formed, each of which produces 8 spores [ascospores]. Therefore Fenicillium must be set down as an Ascomycete, one representing the section of cleistocarpous Asco- mycetes, with closed fruit-body. Out of the spores developed in the asci the brush-like gonidiophores have been again developed upon the object-slide. NOTES TO CHAPTEK XXIII. ^ Brefeld, ScliimmelpiJze, Heft I., p. 10 ; the other literature is given here. Brefeld, l.c., p. 18. ' 2 Compare de Bary., Ann. des Sc. nat. Botaniqne, IV. Series, tom. XX., p. 32, and Bcitrage zvr ]\lorph.. und Phys. der Pilze, Heft II., p. 35. •» Brefeld, lx., Heft II. ® Strashurger, Zellh. u. Zellth, 3rd edit., p. 221. 8 Brefeld, l.c., p. 39. Compare Bainier, Annnlea d‘’S Sciences naturellcs, Botaniqne, VI. Series, tom. XI., p. 315, for further i>articulars on the culture of the Mucorinca3, ® In the examination of fresh objects in water, it often happens that air clings very tightly amongst the hyphte, and hinders observation. Attempts to remove the air have usually disadvantageous effects upon the preparation itself. In order to render the gonidiophores of these and other moulds free of air, as far as they will admit of it, and yet having their natural distribution, the following method may be used : A scrap of the material is laid carefully upon the surface of a drop of glycerine, a drop of alcohol is placed upon it, and the cover-glass is laid on.