. Our native ferns and their allies [microform] : with synoptical descriptions of the American pteridophyta north of Mexico. Ferns; Fougères. THE FERN ALLIES. 37 LITERATURE. Baker (John G.). Fern Allies, pp. 7-123. London, 1887. (George Bell & Sons.) Spring (A.). Monographic de la Famille des Lycopodla- ches. In Mimoires de VAcadimie Roy ale de Belgique, XV, i-i 10 (1842); XXIV, 1-358 (1849). ^ir "in 5, :i \ D. THE QUILLWORTS. 99. General Characters.—The quillworts, so named from the appearance of the leaves, are principally incon- spicuous aquatic plants of a grass-like or rush-like
. Our native ferns and their allies [microform] : with synoptical descriptions of the American pteridophyta north of Mexico. Ferns; Fougères. THE FERN ALLIES. 37 LITERATURE. Baker (John G.). Fern Allies, pp. 7-123. London, 1887. (George Bell & Sons.) Spring (A.). Monographic de la Famille des Lycopodla- ches. In Mimoires de VAcadimie Roy ale de Belgique, XV, i-i 10 (1842); XXIV, 1-358 (1849). ^ir "in 5, :i \ D. THE QUILLWORTS. 99. General Characters.—The quillworts, so named from the appearance of the leaves, are principally incon- spicuous aquatic plants of a grass-like or rush-like aspect (Fig. 27). Some species are always submerged — often in several feet of water; others grow in marshy soil or in the shallow margins of ponds or streams, where they become ap- parently terrestrial in time of low water; while others still are found between high and low water marks, where they will be covered by water at high tide. The leaves are awl-shaped or linear, and are attached to a short fleshy trunk. They vary in number from ten to one hun- dred in each plant, and in length from two to twenty inches in various species. On account of their resemblance to the im- mature forms of rushes and other aquatic vegetation of a higher order, they have been very sparingly collected. Many questions of distribution, habits, and life-history may be studied by even amateur botanists in various sections of the Fig. vj.—Iso'ites lacustris L., natural size. (Redrawn from Sprague.) i:. 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 Underwood, Lucien Marcus, 1853-1907. New York : H. Holt
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