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Dennstaedtia
Family: Dennstaedtiaceae
Dennstaedtia image
Paul Rothrock
  • FNA
  • Gleason & Cronquist
  • Resources
Clifton E. Nauman
A. Murray Evans in Flora of North America (vol. 2)
Plants terrestrial, often forming colonies. Stems subterranean, long- to short-creeping; hairs dark reddish brown, jointed. Leaves clustered or scattered, erect to arching, ovate to lanceolate to deltate, 0.4--3 m. Petiole glabrous to pubescent, usually without prickles, often with stem buds near base; vascular bundles 1--2, arranged in U- or O-shape in cross section. Blade 2--4-pinnate; rachis without prickles; nectaries absent. Segments pinnately divided, ultimate segments ovate to lanceolate, margins dentate or lobed. Veins free, pinnately branched. Sori marginal at vein tips, distinct, round or cylindric; indusia formed by fusion of true indusium and minute blade tooth to form circular or slightly 2-valvate cup. Spores tetrahedral-globose, trilete (rarely monolete), tuberculate or ridged. x = 34, 46, 47.
Vascular plants of NE US and adjacent Canada
Petiole with a single gutter-shaped bundle; lvs soft, membranous, their veins free, apically thickened, not reaching the margin; sori marginal at the vein-tips, the thin, whitish, cupulate indusium formed partly by a recurved modified tooth of the lf-margin; sporangia few; delicate ferns with elongate, branched rhizomes and fragrant, distant, erect, deciduous compound lvs, the rhizome, petiole and blade with septate hairs. 70, mainly trop.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.
Dennstaedtia bipinnata
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Dennstaedtia cicutaria
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Dennstaedtia globulifera
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Dennstaedtia obtusifolia
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Dennstaedtia punctilobula
Image of Dennstaedtia punctilobula
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NSF NEON | Open Data to Understand our Ecosystems The National Ecological Observatory Network is a major facility fully funded by the National Science Foundation. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the National Science Foundation.