. Foundations of botany. Botany; Botany. 318. The Spore-Plant. — Search for indications of fruiting, and note the appearance of the " button mushrooms " in all aTailable stages. Draw. See if at any stage up to maturity an outer envelope of tissue (yolva) can be found enclosing the entire fruiting body. If such be present, what becomes of it at maturity ? If material is available, compare the "species of Amanita (poisonous) in regard to this. Examine specimens in which the cap is expanding and see if there is another tissue forming a veil covering the under surface of the cap. If
. Foundations of botany. Botany; Botany. 318. The Spore-Plant. — Search for indications of fruiting, and note the appearance of the " button mushrooms " in all aTailable stages. Draw. See if at any stage up to maturity an outer envelope of tissue (yolva) can be found enclosing the entire fruiting body. If such be present, what becomes of it at maturity ? If material is available, compare the "species of Amanita (poisonous) in regard to this. Examine specimens in which the cap is expanding and see if there is another tissue forming a veil covering the under surface of the cap. If such be pres- ent, how is it attached ^"^ and what becomes of it? Take a fresh, well- expanded mushroom or toadstool. Remove the stalk, or stipe, close under the cap, or pileus, and lay the latter, gills down, on a piece of paper. Let it remain undisturbed for a few hours, or over night, so that the spores may fall upon the paper. Note carefully their color, also the form in which they are arranged on the paper. What determines this form ? Examine some of the spores under the highest available power of the micro- scope. Measure and draw. Describe the stipe. Is it a hollow tube or solid ? Does it taper ? Note length, diameter, color. Describe the cap, or pUeus, in regard to diameter, thickness, nature and color of the upper surface, also color below. Examine the plates, or gills, which compose the under portion of the pileus. Cut a complete pileus and stipe, through the center, and draw an outline to show the shape, noting particularly how the gills are attached. What is the color of the gills ? 319. Origin of Spores. — Make a cross-section of one of the gills, and with a magnifying power of about 200 diameters examine the B Fig. 195.—Portions ot Gills of a Fungus {Agarieus). A, slightly magnified; B, one of the parts of A, more mag- nified, kym, hymenium; h, central Please note that these images are extracted from scanned page images that may have been digit
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