. Introduction to the study of fungi; their organography, classification, and distribution, for the use of collectors. Fungi. 8o INTRODUCTION TO THE STUDY OF FUNGI of the stosa&ta of the host-plant, where it becomes the new mycelium of a spore:bed, which may either be that "of a uredo- spore or a" teleTffippare! The violet leaves which display on their under surface the pale-brown^cattered^pustules of_the uredospores, will, later in thlTseason, exhibit aksojrimUar pustuEsjEnxeJ'with them^and nearly of the same size and form, but much darker in colour, or -the leaf may be occupied
. Introduction to the study of fungi; their organography, classification, and distribution, for the use of collectors. Fungi. 8o INTRODUCTION TO THE STUDY OF FUNGI of the stosa&ta of the host-plant, where it becomes the new mycelium of a spore:bed, which may either be that "of a uredo- spore or a" teleTffippare! The violet leaves which display on their under surface the pale-brown^cattered^pustules of_the uredospores, will, later in thlTseason, exhibit aksojrimUar pustuEsjEnxeJ'with them^and nearly of the same size and form, but much darker in colour, or -the leaf may be occupied, entirely with these darker pustules, which contain the teleutospores. Seen under the microscope, these spores of the third generation will be _ found to differ from the aecidiosporesand the uredospores in being two^eelled ~—that is to say, they are divided across the centre by a trans- verse septum into two superimposed cells of a somewhat hemi- spherical form, supported upon a longer and more persistent hyaline pedicel. They are produced, like "th"e uredospores, from a spore-bed of mycelium arranged more or less compactly side by side. The apex of the upper cell has gener- ally a more or less conspicuous hyaline nipple in the centre. In this species the coat of the spore is smooth, but in some others it is warted or spinulose (Kg. 45). I&ejiiatiue teleutospore may of Pmcinia. After Tuiasne. germinate alinc-st immediately, or ^ in some species "only after a con- siderable period_of rest, in which latter case they are practically resting spores. The germ tube from either cell, projecting through the germ-pore, is at first a simple tube into" which the contents of the. cell pass, and retreat to the upper" end, which continues to grow and, become a promycelium.' The extremity becomes divided off from above downwards by one or more septa, and then each compartment sends off a short pointed branch, which is soon dilated
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Keywords: ., bookauthorcookemcm, bookcentury1800, bookdecade1890, bookyear1895
