#pteridium

native

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 or strongly emergent if in wet soil; leaf 3 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, sori at ot near margin; new leaves generally coiled, unrolling as they develop

 indusia 0 or sori covered by reflexed  or recurved  leaf margin or leaf margin segment

Pinnae [some or all of them] conspicuously toothed, lobed, or compound

Rhizome and base of petiole  covered by hairs; rhizome  long-creeping; leaf  often > 80 cm, sometimes >= 2 m — blade  widely triangular, 2–4-pinnate ..... DENNSTAEDTIACEAE

Description

Rhizome,  generally deep uderground, long-creeping, 

Stipe/Petiole: black near base, with dense, +- brown hairs

Blades: fertile and sterile alike, widely-triangular, leathery, 3 pinnate, veins free except at fertile margins,  lower pinnae/leaflets  generally longest,  segments or lobes wide, oblong, round at tip, hairs abaxially, sometimes adaxially, generally dense, straight

Sporangia: marginal, continuous till tip, on connecting veins covered by false indusium 

Sources and More information

Plants of the World online

https://www.wildflower.org/plants/result.php?id_plant=ptaq

https://www.itis.gov/servlet/SingleRpt/SingleRpt?search_topic=TSN&search_value=17224#null

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

https://www.instagram.com/p/CH-AGwMg9xf/?utm_source=ig_web_copy_link

Jepson Manual Key

Jepson Manual 

Calscape

Calflora

This one is different should be reliable but has different information: https://www.youtube.com/watch?v=UJ94VrEl7hE