Hardy Fern Home

W. polystichoides resources
Flora
Flora of JapanFlora of Japan
Photo
fertile pinnafertile pinna
frondsfronds
inoperativehabit (link inoperative)
habithabit
pinnae, scales, stipepinnae, scales, stipe
Photo index
PlantSystematics.org, diagnostic photosPlantSystematics.org, diagnostic photos

All Ferns
  Woodsiaceae
   Woodsia
     alpina
     glabella
     ilvensis
     intermedia
     manchuriensis
     obtusa
     oregana
     polystichoides
     scopulina

 Other Genera
    Adiantum  Arachniodes
    Aspidotis  Asplenium
    Astrolepis  Athyrium
    Blechnum  Cheilanthes
    Cryptogramma  Cyrtomium
    Cystopteris  Dennstaedtia
    Deparia  Diplazium
    Dryopteris  Gymnocarpium
    Lygodium  Matteuccia
    Onoclea  Oreopteris
    Osmunda  Pellaea
    Phegopteris  Pleopeltis
    Polypodium  Polystichum
    Pteridium  Pteris
    Pyrrosia  Thelypteris
    Woodwardia
 
Woodsia polystichoides D. C. Eaton

Holly fern woodsia

Etymology Polystichoides means looking like the fern Polysticum.
Description Rhizome: erect, short, scaly.
Frond: 30 cm high by 5 cm wide, deciduous, monomorphic, blade/stipe ratio: 3:1.
Stipe: red-brown, obliquely jointed at top, old stipe bases 4-7 cm., densely scaly at base, sparsely hairy and scaly above; scales lanceolate, to 6 x 2 mm, pale brown, vascular bundles: 2, round or oblong.
Blade: 1-pinnate, narrowly lanceolate or linear, somewhat narrower at the base, herbaceous, soft, hairy on both surfaces, also scaly beneath, scales linear.
Pinnae: 15 to 24 pair, pinnae lanceolate or oblong-lanceolate, eared upwards at the base, 25 x 7 mm; costae grooved above, grooves continuous from rachis to costae; margins entire or dentate ; veins free, simple or forked, ending before the margin.
Sori: round, in one row near the margin, indusium: cup-like dissected into shallow lobes, hairy, basal, surrounding, sporangia: brownish.
Culture Habitat: on rocks in sun. Distribution: eastern Asia. Hardy to -30C, USDA Zone 4.
Distinctive Characteristics This and W. intermedia are similar, but this is a larger plant with many more pinnae pairs. Also, the upper pinnae in W. intermedia are adnate to the rachis, not so here. Both species are distinguished in having the stipes jointed at the top.
Woodsia polystichoides
Woodsia polystichoides. Habit, early June.  Ray Edwards, 2004.
Notes
Compare to This and W. intermedia are 1-pinnate. All other Woodsia are more divided.
Woodsia polystichoides
Woodsia polystichoides. Early summer. Even under a hand lens (or via the click-through blow-up) the indusium is indistinct, obscured by the many scales.  Scan: Tom Stuart
Valid XHTML 1.0     Reports of errors and omissions appreciated: toms AT hardyfernlibrary.com (please replace the AT with @)