. 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. FERN FAMILY. 11 i. Onoclea sensibilis L. Sensitive Fern. Fig. 21. Onoclea sensibilis L. Sp. PI. 1062. 1753. Rootstock rather slender, copiously rooting. Fer- tile leaves i°-2j° high, persistent over winter, the fertile portion bipinnate, much contracted, the short pinnules rolled up into closed berry-like bodies and forming a narrow close panicle. Ster
. 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. FERN FAMILY. 11 i. Onoclea sensibilis L. Sensitive Fern. Fig. 21. Onoclea sensibilis L. Sp. PI. 1062. 1753. Rootstock rather slender, copiously rooting. Fer- tile leaves i°-2j° high, persistent over winter, the fertile portion bipinnate, much contracted, the short pinnules rolled up into closed berry-like bodies and forming a narrow close panicle. Sterile leaves i°-4i° high, the blades broadly triangular, deeply pinnatifid, the rachis winged; pinnae lanceolate-oblong, entire, undulate, or the lower and sometimes the middle ones sinuate-pinnatifid; veins freely anastomosing, forming a somewhat regular series of narrow elon- gate areoles next the midvein and numerous smaller areoles between this series and the margin. In moist soil, Newfoundland to Saskatchewan, south to Oklahoma and the Gulf states. Ascends to 3000 ft. in Virginia. Various intermediate forms between the sterile and fertile leaves occur. Sensitive to early frosts. 1866. 2. MATTEUCCIA Todaro, Giorn. Sci. Nat. Palermo 1: 235. [Struthiopteris Willd. 1809, not Weiss, 1770.] Coarse lowland ferns with dissimilar leaves in a close crown upon a stout ascending rootstock. Sterile leaves tall, in a complete circle, the shorter fertile leaves appearing late in the season, borne within, rigidly erect, the pinnae closely contracted into necklace-like or pod-like divisions, these concealing the sori, finally dehiscent. Sori roundish, on elevated cylindrical receptacles, partly covered by delicate fugacious lacerate indusia attached below. [Named in honor of Carlo Matteucci, an Italian professor of physics.] Species 3, the following, which is the generic type, and 2 Asiatic species. i. Matteuccia Struthiopteris (L.) Todaro. Ostrich-fern. Fig. 22. Osmunda Strut
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
