Northern Holly Fern
(Polystichum lonchitis)

Other scientific names: Aspidium lonchitis, Dryopteris lonchitis, Polypodium lonchitis, Polystichum X marginale

French names: Polystic faux-lonchitis

Family: Polypody Family (Polypodiaceae)

Similar species:
  •   Braun's Holly Fern (Polystichum braunii) - twice divided: looks more "frilly".

  •   Christmas Fern (Polystichum acrostichoides) - very similar, but less of an upright look to it.

  •   Ebony Spleenwort (Asplenium platyneuron) - much smaller, darker stem.

  •   Polypody (Polypodium virginianum) - different leaflets, much smaller.

Fronds: Once divided

Height: up to 2 feet

Native/Non-native: Native

Status: Uncommon in the south, a lot more common in the north.

Photographs: 74 photographs available, of which 11 are featured on this page. SCROLL DOWN FOR PHOTOGRAPHS.

  

The whole plant. It closely resembles Christmas Fern (Polystichum acrostichoides).

Another one.

Leaflets along the stalk.

Closeup view of the leaflets. Note the sharp points (like holly).

Underside of the leaflets, showing the indusia. The indusia are evenly spaced in two rows.

I don't mean to confuse you but ... this is part of a young frond. The leaflets look sort of like Green Spleenwort (Asplenium trichomanes-ramosum) (except they're a lot bigger).

Herbarium specimen showing the whole plant.

(Royal Botanical Gardens Herbarium, Burlington, Ontario)

Herbarium specimen showing roots.

(Royal Botanical Gardens Herbarium, Burlington, Ontario)

Herbarium specimen showing pattern of sori.

(Royal Botanical Gardens Herbarium, Burlington, Ontario)

Herbarium specimen showing pinnae.

(Royal Botanical Gardens Herbarium, Burlington, Ontario)

Herbarium specimen showing frond tip.

(Royal Botanical Gardens Herbarium, Burlington, Ontario)
  

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