Dennstaedtiaceae Lotsy
  • Vortr. Bot. Stammesgesch. 2: 655. 1909. (July-Sept. 1909)

Cite taxon page as 'WFO (2019): Dennstaedtiaceae Lotsy. Published on the Internet; Accessed on: 10 Dec 2019'

General Information

Plants perennial, mostly terrestrial, rarely epiphytic, generally in mesic, forested habitats. Stems short- to long-creeping, solenostelic [protostelic], bearing hairs (or less often scales), often branching by means of buds on proximal part of petiole. Leaves monomorphic, circinate in bud. Petiole not articulate, with 1--many vascular bundles, hairy or glabrous [scaly]. Blade 1-pinnate to decompound (rarely simple), glabrous or hairy or with mixture of hairs and glands; rachis and costae grooved adaxially [not grooved in some genera]. Veins free or sometimes joined at margin in fertile segments, pinnate or forking in ultimate segments. Sori near or at blade margin on vein tips or submarginal commissural vein; true (inner) indusia present, free or fused with portion of blade margin to form cup or pouch, or obscured by revolute and usually modified portion of blade margin [indusia rarely absent]; sporangial stalk of 1--3 rows of cells. Spores not green, tetrahedral or bilateral, monolete or trilete. Gametophytes green, cordate, with archegonia and antheridia borne on lower surface.

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    • ]. 

    Plants terrestrial, sometimes climbing. Rhizome usually long creeping, solenostelic, siphonostelic, or polystelic, usually covered with multicellular hairs, less often with few-celled, cylindrical, glandular hairs or multicellular bristles, scales absent. Fronds medium-sized to large, sometimes indeterminate, monomorphic; stipes not articulate to rhizome, usually hairy, rarely glabrous; lamina 1-4-pinnately compound, thinly herbaceous to leathery, hairy or glabrous, without scales; rachis grooved adaxially, sometimes with buds (Monachosorum); pinnae opposite or alternate; veins usually free, pinnate or forked, not reaching margin, reticulate without included veinlets in Histiopteris. Sori marginal or intramarginal, linear or orbicular, terminal on a veinlet or on a vascular commissure joining apices of veins; indusia linear or bowl-shaped, sometimes double with outer false indusium formed from thin reflexed lamina margin and inconspicuous inner true indusium; paraphyses present or not. Spores tetrahedral and trilete, or reniform and monolete, spinulose, tuberculate, or smooth. Gametophytes green, cordate. x = 26, 29, 30, 31, 33, 34, 38, 46, 47, 48, and probably others.

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    • ]. 


    Rhizomes creeping, hairy, vascular system solenostelic or in Pteridium a complex double solenostele; stipes with convoluted undivided vascular strands, which are sometimes U–shaped or with a system of several bundles in a horseshoe arrangement

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    • 1
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    Holttum, R. E. 1947. A revised classification of the leptosporangiate ferns. J. Linn. Soc., Bot. 51: 123--158. Mickel, J. T. 1973. Position of and classification within the Dennstaedtiaceae. In: A. C. Jermy et al., eds. 1973. The Phylogeny and Classification of the Ferns. London. Pp. 135--144. [Bot. J. Linn. Soc., Suppl. 1.]

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    • 2
    • ]. 

     Information From

    Plants Of the World Online Portal - FWTA
    • A The Trustees of the Royal Botanic Gardens, Kew
    Flora of North America @
    'Flora of North America @ eFloras (2008). Published on the Internet [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • B Flora of North America Association
    Flora Of CHina @
    'Flora of China @ eFloras (2008). Published on the Internet [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • C Missouri Botanical Garden
    World Flora Online Data. 2017.
    • D CC0 1.0 Universal (CC0 1.0).
    World Flora Online consortium
    World Flora Online Data. 2018.
    • E CC0 1.0 Universal (CC0 1.0).