. 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. '4 POLYPODIACEAE. Vol. 6. Woodsia obtusa (Spreng.) Torr. Blunt- lobed Woodsia. Fig. 28. Polypodium obtusum Spreng. Anleit. 3: 92. 1904. Woodsia obtusa Torr. Cat. PI. in Geol. Rep. N. if. 195- 1840. Rootstock short, creeping, with relatively few leaves. Stipes not jointed, straw-colored, chaffy, 3'-6' long; blades broadly lanceolate, 6'-is' long, minutely gl
. 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. '4 POLYPODIACEAE. Vol. 6. Woodsia obtusa (Spreng.) Torr. Blunt- lobed Woodsia. Fig. 28. Polypodium obtusum Spreng. Anleit. 3: 92. 1904. Woodsia obtusa Torr. Cat. PI. in Geol. Rep. N. if. 195- 1840. Rootstock short, creeping, with relatively few leaves. Stipes not jointed, straw-colored, chaffy, 3'-6' long; blades broadly lanceolate, 6'-is' long, minutely glandular-puberulent, nearly or quite 2-pin- nate; pinnae rather remote, triangular-ovate or oblong, pinnately parted into oblong obtuse crenate- dentate segments, or usually pinnate, the lower pin- nules free and parted nearly to the midveihs; sori nearer the margin than the midveins; indusia con- spicuous, at first enclosing the sporanges, at length splitting into several broad jagged spreading lobes. On rocks, Nova Scotia and Maine to Wisconsin and south to Georgia, Alabama, and Texas. Also in Alaska and British Columbia. Variable. Ascends to 2200 ft. in Virginia. 4. DENNSTAEDTIA Bernh. Schrad. Journ. Bot. 18002: 124. 1801. [Dicksonia in part of some authors, not L'Her. 1788.] Mostly medium-sized ferns, with slender wide-creeping hairy rootstocks and scattered 2-3-pinnate erect leaves, 2°-6° high. Sori marginal, terminal upon the free veinlets, the sporanges clustered upon a very small receptacle within a special cup-shaped indusium formed in part of the more or less modified reflexed segment of the leaf-margin. [Name in honor of August Wilhelm Dennstaedt.] About 50 species mainly of tropical and subtropical regions. Type species: D. flaccid a (Forst.) Bernh. i. Dennstaedtia punctilobula (Michx.) Moore. Hay-scented Fern. Fig. 29. Nephrodium punctilobulum Michx. Fl. Bor. Am. 2: 268. 1803. Dicksonia pilosiuscula Willd. Enum. 1076. 1809. Dicksonia punctilobula A. Gray, Man. 628
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