#polypodiales

[chlorophyll-and-chitin]

Opisthoncus sp. on Asplenium sp.

31-OCT-2025

Kings Domain, Melbourne, Vic

[rjalker]

Ferns.....they remain a mystery to me. But now I do notice some differences between them.

Species according to other people.

Woodwardia virginica:

[ID: A photo of a Virginian chainfern frond with more behind it. The fern is dark green, with rounded, deeply-toothed leaves. The central stem is thin, and appears dark in this photo. End ID.]

Woodwardia areolata:

[ID: A photo of a netted chain fern frond. It is light green, with large, almost smooth lobes. The central stem is bordered by a thin leafy area, making it flat and wide rather than thin and round. End ID.]

Osmundastrum cinnamomeum:

[ID: A photo of a cinnamon fern frond, with a green butterfly net nearby. These leaves are dark green, and have rounded but shallow teeth. The central stem is very thin. End ID.]

[californiabotanycertification]

Polystichum imbricans, Narrowleaf Sword Fern

Polystichum imbricans, Narrowleaf Sword Fern

perennial fern

KEY

terrestrial plant with no flowers or bulbs sporangia present

Herbs reproducing by spores released directly from sporangia, the sporangia variously located [on abaxial leaf  face, [LYCOPHYTES and FERNS]

Plant terrestrial l; leaf 1-2 pinnate,; sporangia borne on aerial portion of leaf

Leaves all alike or nearly so, the fertile [sporangium-bearing] blades very similar in size and shape to sterile blades sporangia borne on underside of leaf  blade, new leaves generally coiled, unrolling as they develop

Sori borne away from margin on underside of leaf  or leaflet, sporangia clustered in distinct sori; indusia present

Sori ± round

Blade without needle-like hairs

Indusium peltate  or round-reniform, attached ± in center of sorus , generally present and readily observable in late-season specimens ..... DRYOPTERIDACEAE

- Indusium peltate , centrally attached, without a sinus

- Veins generally free, rarely ± joined; leaf 1–3-pinnate, teeth, generally including bristle-like tips, < 4 mm ..... POLYSTICHUM

-Leaf generally 1-pinnate, rarely to partly 2-pinnate; pinnae generally simple, ± entire to serrate, in Polystichum kruckebergii sometimes 1-lobe

Leaf 10–120(200) cm; pinnae simple

Proximal pinnae ovate to lanceolate , ± = to ± 2/3 longest; stipe generally 1/5–1/2 blade

Stipe base scales lanceolate, ± 2–3 mm wide, those above proximal pinnae generally < 1 mm wide, falling early; pinnae ± in 1 plane or not; indusium ± entire to toothed ..... P. imbricans

DESCRIPTION

Rhizome: generally suberect to erect, often stout

Stipe/petiole: generally 1/5--1/2 of blade Stout, firm, generally densely scaly, base scales +- 2--3 mm wide, lanceolate, those above proximal pinnae generally, ×-section with many round vascular strands in an arc.

Blade: narrow-lanceolate to -elliptic, 1-pinnate,, proximal pinnae reduced or not, thin to leathery, scaly, veins generally free, rarely +- jointed; pinna bases often wider acroscopically; teeth, generally including bristle-like tip

Sporangia: sori round; indusium peltate [0 or reniform], sinus 0. indusium +- entire to toothed

SOURCES AND MORE INFORMATION

https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=17681#null

https://plants.usda.gov/core/profile?symbol=POIM

https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=10784

https://www.inaturalist.org/taxa/58763-Polystichum-imbricans

https://calphotos.berkeley.edu

https://www.instagram.com/p/CeFidZIrKxT/

https://wildflowersearch.org/search

Jepson Herbarium Youtube Polystichum Munitum

[deathtek]

6/1/22

[botanizing]

Adiantum raddianum (Pteridaceae)

Delta maidenhair fern

Bergianska Trädgården | Mar. 3, 2020

guess I’m going through a fern phase *starts sporulating*

[friendsrpbg]

H20130518-8225—Pentagramma visccosa—RPBG-1 by John Rusk Via Flickr: Pentagramma viscosa—sticky goldback fern. Moved in 2016 form Pentagramma triangularis ssp. viscosa—sticky goldback fern to its current taxon of P. viscosa. Ranges from the Channel Islands and Los Angeles County southward into Baja California usually in proximity to the Pacific Ocean , although there are a few inland populations according to CalFlora range map for the species. The common name comes from the sticky fluid it exudes, unique within the genus Pentagramma. Photographed at Regional Park Botanic Garden located in Tilden Regional Park near Berkeley, CA

[dendroica]

Sensitive Fern, Onoclea sensibilis (by me)

[natural-reflection]

Star Cloak Fern or Stadley's Cloak Fern Notholaena stadleyi

Concan, Texas, United States, 2015 Garner State Park