Compilation
Cyclosorus dentatus

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Name

Identification
Cyclosorus dentatus (Forssk.) Ching [family THELYPTERIDACEAE ] (stored under name); Verified by A. C. Smith, 2010
Related name
  • Aspidium molle
  • `
  • Aspidium violascens
  • Christella dentata
  • Polypodium pubescens
  • Aspidium nymphale
  • Dryopteris hirtopilosa
  • Thelypteris dentata
  • Pseudocyclosorus camerounensis
  • Aspidium cirrhosum
  • Aspidium aquapimense
  • Cyclosorus dentatus
  • Christella hispidula
  • Polypodium nymphale
Common name
  • tapering tri-vein fern, Flora of North America Vol. 2
  • Downy maiden fern, Flora of North America Vol. 2
  • downy shield fern, Flora of North America Vol. 2

Flora

Entry for Thelypteris dentata (Forsskål) E. P. St. John [family THELYPTERIDACEAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 2,
Names
Thelypteris dentata (Forsskål) E. P. St. John [family THELYPTERIDACEAE], Amer. Fern J., 26: 44. 1936
Polypodium dentatum Forsskål [family POLYPODIACEAE], Fl. Aegypt.-Arab., 185. 1775
Christella dentata (Forsskål) Brownsey & Jermy [family THELYPTERIDACEAE]
Cyclosorus dentatus (Forsskål) Ching [family THELYPTERIDACEAE]
Dryopteris dentata (Forsskål) C. Christensen [family DRYOPTERIDACEAE]
Dryopteris mollis (Swartz) Hieronymus [family DRYOPTERIDACEAE]
Thelypteris reducta Small [family THELYPTERIDACEAE]
Treatment Author(s)
Alan R. Smith
Information
Stems short-creeping, 4--6 mm diam. Leaves often somewhat dimorphic, evergreen, often closely placed, 50--150 cm, fertile leaves with longer petioles and more contracted pinnae. Petiole often purplish brown, 15--50 cm × 3--6 mm, at base with brown, linear-lanceolate, hairy scales. Blade (25--)40--100 cm, 1--4(--6) proximal pairs of pinnae reduced, blade gradually tapered to pinnatifid apex. Pinnae 7--17 × 1--3 cm, incised 1/2--3/4 of width; segments rounded at apex, basal acroscopic segment of proximal pinnae often auriculate; proximal pair of veins from adjacent segments united at obtuse angle below sinus with excurrent vein 2--4 mm. Indument abaxially of uniformly short hairs 0.1--0.2 mm on costae, veins, and blade tissue; veins adaxially with stouter hairs, also with hairs 0.1--0.2 mm on blade tissue. Sori round, medial to supramedial; indusia tan, pubescent, hairs 0.1--0.3 mm; sporangial stalks with orangish, stalked glands. 2 n = 144.
Altitude range
0--100 m
Distribution
s MexicoWest Indies in the AntillesSouth America to n Argentinanative to tropical and subtropical AsiaAfrica.USA Ala.USA Fla.USA Ga.USA Ky.USA La.
Discussion
Thelypteris dentata probably does not persist northward in areas (such as Kentucky) where winters are sometimes severe (R. Cranfill 1980).
Native/Introduced
introduced

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