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Polystichum acrostichoides

Polystichum acrostichoides (Michx.) Schott

 

Christmas Fern, Christmas Fern [Crested form]

KingdomPlantaePlants, but not fungi, lichens, or algae (from Stearn’s Botanical Latin)
SubkingdomTracheobiontaVascular plants—plants with a “circulatory system” for delivering water and nutrients
DivisionPteridophytaFerns
ClassFilicopsida“Leptosporangiate” (has to do with how their spores form) ferns—includes most ferns
OrderPolypodialesPolypod ferns
FamilyDryopteridaceaeWood ferns (about 70% of the ferns)
GenusPolystichumFrom the Greek polys, “many,” and stichos, “row,” referring to the rows of sori on the type species
SpeciesacrostichoidesLike genus Acostichum

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Polystichum acrostichoides description by Thomas H. Kent, last updated 13 Nov 2013.

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Polystichum acrostichoides (Christmas Fern, Christmas Fern [Crested form])

Sterile pinnae. · 9/15/2012 · Mt. Wachusett, Princeton, MA
≈ 11 × 7" (27 × 18 cm)

Polystichum acrostichoides (Christmas Fern, Christmas Fern [Crested form])

4/29/2010 · Bruce Freeman Rail Trail, Chelmsford, MA
≈ 15 × 10" (39 × 26 cm)

Polystichum acrostichoides (Christmas Fern, Christmas Fern [Crested form])

7/19/2012 · Red Pine Trail, Beaver Brook Association Conservation Lands, Rte. 130, Hollis, NH
≈ 14 × 9" (35 × 23 cm)

Polystichum acrostichoides (Christmas Fern, Christmas Fern [Crested form])

8/24/2009 · Tom and Susan’s, Pepperell, MA
≈ 2½ × 3½" (6.6 × 9.8 cm)

Polystichum acrostichoides (Christmas Fern, Christmas Fern [Crested form])

9/20/2014 · Garden in the Woods, Framingham, MA

Polystichum acrostichoides (Christmas Fern, Christmas Fern [Crested form])

Sterile pinnae. · 9/15/2012 · Mt. Wachusett, Princeton, MA
≈ 12 × 8" (31 × 20 cm)

Polystichum acrostichoides (Christmas Fern, Christmas Fern [Crested form])

8/23/2009 · Tom and Susan’s, Pepperell, MA
≈ 17 × 12" (44 × 29 cm)

Polystichum acrostichoides (Christmas Fern, Christmas Fern [Crested form])

8/23/2009 · Tom and Susan’s, Pepperell, MA
≈ 4½ × 7" (11 × 17 cm)

Polystichum acrostichoides (Christmas Fern, Christmas Fern [Crested form])

[Incised form] · 9/14/2010 · Garden in the Woods, Framingham, MA
≈ 3 × 4½" (7.9 × 11 cm)

Polystichum acrostichoides (Christmas Fern, Christmas Fern [Crested form])

8/24/2009 · Tom and Susan’s, Pepperell, MA
≈ 4½ × 7" (11 × 17 cm)

Polystichum acrostichoides (Christmas Fern, Christmas Fern [Crested form])

8/23/2009 · Tom and Susan’s, Pepperell, MA
≈ 17 × 12" (44 × 29 cm)

Polystichum acrostichoides (Christmas Fern, Christmas Fern [Crested form])

The smaller pinnae near the end of the frond are the fertile ones. · 9/15/2012 · Mt. Wachusett, Princeton, MA
≈ 9 × 6" (23 × 15 cm)

Polystichum acrostichoides (Christmas Fern, Christmas Fern [Crested form])

[Incised form] · 9/14/2010 · Garden in the Woods, Framingham, MA
≈ 21 × 14" (52 × 34 cm)

Polystichum acrostichoides (Christmas Fern, Christmas Fern [Crested form])

8/23/2009 · Tom and Susan’s, Pepperell, MA
≈ 4 × 6" (10 × 15 cm)

Polystichum acrostichoides (Christmas Fern, Christmas Fern [Crested form])

8/23/2009 · Tom and Susan’s, Pepperell, MA
≈ 4½ × 7" (11 × 17 cm)

Polystichum acrostichoides (Christmas Fern, Christmas Fern [Crested form])

8/23/2009 · Tom and Susan’s, Pepperell, MA
≈ 4 × 6" (10 × 15 cm)

Range:

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