. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. Genus i. QUILLWORT FAMILY. 51 2. Isoetes Tuckermani A. Br. Tuckerman's Quillwort. Fig. 119. Isoetes Tuckermani A. Br. in A. Gray, Man. Ed. 5, 676. 1867. Isoetes Tuckermani borealis A. A. Eaton, Fernwort Papers 10. 1900. Isoetes Harveyi A. A. Eaton, Fernwort Papers n. 1900. Submerged or rarely partly or wholly emersed during very dry seasons; leaves 10-40, very
. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. Genus i. QUILLWORT FAMILY. 51 2. Isoetes Tuckermani A. Br. Tuckerman's Quillwort. Fig. 119. Isoetes Tuckermani A. Br. in A. Gray, Man. Ed. 5, 676. 1867. Isoetes Tuckermani borealis A. A. Eaton, Fernwort Papers 10. 1900. Isoetes Harveyi A. A. Eaton, Fernwort Papers n. 1900. Submerged or rarely partly or wholly emersed during very dry seasons; leaves 10-40, very slender, tapering, olive-green, quadrangular, 2'-$' long, with- out peripheral bast-bundles, the outer recurved; sporange oblong, mostly white, its upper one-third covered by the velum; macroscpores 440-785 M in diameter, with wavy somewhat parallel and branch- ing ridges on the upper half, separated by the three converging ridges, the lower covered with an ir- regular network; microspores 26-42 M long, nearly smooth, or with minute spines. In ponds, Newfoundland to Massachusetts and Con- necticut ; clustered in shallow 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 Britton, Nathaniel Lord, 1859-1934; Brown, Addison, 1830-1913. New York, Scribner
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
