. Plants and their uses; an introduction to botany. Botany; Botany, Economic. POISONOUS DRUGS 179. Fig. 170.—Male-fern (A^ptdium Filix-mas, Polypody ramil3-. Polypodiaceie). 1, plant showing the rootstock which grows underground and pro- duces roots below, and above gives rise to leaves which unfold from coils (a, a) and finally produce "fruit dots" or sori on the back, }. '2, rootstock cut across showing the woody vessels (a, a) through which the sap runs. 5, segment of the leaf, under side, showing sori or clusters of spore-cases (6) each cluster protected by a cover or 'indusium{a
. Plants and their uses; an introduction to botany. Botany; Botany, Economic. POISONOUS DRUGS 179. Fig. 170.—Male-fern (A^ptdium Filix-mas, Polypody ramil3-. Polypodiaceie). 1, plant showing the rootstock which grows underground and pro- duces roots below, and above gives rise to leaves which unfold from coils (a, a) and finally produce "fruit dots" or sori on the back, }. '2, rootstock cut across showing the woody vessels (a, a) through which the sap runs. 5, segment of the leaf, under side, showing sori or clusters of spore-cases (6) each cluster protected by a cover or 'indusium{a). 4^ a sorus cut vertically across the indusiuni. 5, the same cut at right an^e to 4 through the leaf (a), much enlarged to show the indusium (6), and the spore-cases (c). 6, a spore-case discharging spores. (Wos- sidlo.)—A perennial herb; leaves about 30-100 cm. long; fruit dots brownish. Native home, Northern Europe and North 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 Sargent, Frederick Leroy, 1863-. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
