. 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. i. Salvinia natans (L.) Hoffm. Salvinia. Floating Moss. Fig. 87. Marsilea natans L. Sp. PI. 1099. 17 S3- Salvinia natans Hoffm. Deutschl. Fl. 2: 1. 1795- Leaves oblong, rather thick, obtuse or emarginate at the apex, rounded or cordate at the base, entire., spreading, 6-12' long, pinnately veined, bright green and papillose above, the lower surface densely matt
. 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. i. Salvinia natans (L.) Hoffm. Salvinia. Floating Moss. Fig. 87. Marsilea natans L. Sp. PI. 1099. 17 S3- Salvinia natans Hoffm. Deutschl. Fl. 2: 1. 1795- Leaves oblong, rather thick, obtuse or emarginate at the apex, rounded or cordate at the base, entire., spreading, 6-12' long, pinnately veined, bright green and papillose above, the lower surface densely matted with pellucid brown hairs; sporocarps 4-8 in a clus- ter, the upper ones containing about 10 megaspo- ranges, each containing a single megaspore, the re- mainder containing numerous microsporanges each with numerous microspores; megaspores marked with 3 obtuse lobes, these meeting at the apex. Bois Brule Bottoms, Perry Co., Missouri, and near Minneapolis, Minn. Introduced into ponds on Staten Island, N. Y. Reported by Pursh in 1814 from central New York, but his exact station is unknown. Widely distributed in Europe and Asia. 2. AZOLLA Lam. Encycl. 1: 343. 1783. Minute moss-like reddish or green floating plants, with pinnately branched stems covered with minute imbricated 2-lobed leaves, and emitting rootlets beneath. Sporocarps of two kinds borne in the axils of the leaves, the smaller ovoid or acorn-shaped, containing a single megaspore at the base and a few corpuscles above it whose character is not fully known, the larger globose, producing many pedicelled sporanges, each containing several masses of microspores which are often beset with a series of anchor-like processes of unknown func- tion. [Greek, signifying killed by drought.] About s species of wide geographic distribution. Type species: Azolla filiculoides Lam. i. Azolla caroliniana Willd. Carolina Azolla. Fig. 88. Azolla caroliniana Willd. Sp. PI. 5: 541. 1810. Plants greenish or reddish, deltoid or triangular-
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
