. Biological lectures delivered at the Marine Biological Laboratory of Wood's Holl [sic]. Biology. igS BIOLOGICAL LECTURES. of the flowering stalks have been neatly cut away, in order the better to show those that remain. Of these one has had its maturing fruit cut transversely, another longitudinally. But even here we do not stop; for, taking advantage of the original large size of the plant, we have it cut in half, and the interwoven humus roots are thus exposed. Suppose, again, we wish to set out in two bottles sta- minate and pistillate branches of the maiden-hair tree {Gink- go biloba), o
. Biological lectures delivered at the Marine Biological Laboratory of Wood's Holl [sic]. Biology. igS BIOLOGICAL LECTURES. of the flowering stalks have been neatly cut away, in order the better to show those that remain. Of these one has had its maturing fruit cut transversely, another longitudinally. But even here we do not stop; for, taking advantage of the original large size of the plant, we have it cut in half, and the interwoven humus roots are thus exposed. Suppose, again, we wish to set out in two bottles sta- minate and pistillate branches of the maiden-hair tree {Gink- go biloba), or, as shown here, of the Honey-Locust {Gledit- schia triacanthos). To expose the inflorescences properly, most or all of the leaves should be removed to a greater or less extent ; though the retention of the petioles is important, from their mor- phological relation. Still more elaborate prep- aration may be desirable. For example, to represent the growth-phases of seed- lings, an excellent plan is to tie these side by side on a sheet of mica with white silk thread passed through small holes in the sheet. In this way the relative development of primary, secondary, or adventitious roots, the time of ap- pearance on these of root tubercles in leguminous species, the swelling up of root or stem as a storing center in other plants, can all be illustrated. But skill and patience alike can be displayed over flower parts, and once set out, these remain as. Fig. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ). Boston, Ginn & Co
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbiology, bookyear1894
