Federally-Listed Pteridophytes in the USA

These are the lycophytes, ferns and fern allies that are officially listed as rare by the United States federal government. The information is abstracted from their website, at Environmental Conservation Online System: Non-Flowering Plants.


True Ferns

E

Adenophorus periens Hawai'i.

E

Adiantum vivesii Puerto Rico.

E

Asplenium fragile ssp. insulare Hawai'i.

T

Asplenium scolopendrium var. americanum New York, Michigan, Tennessee, Alabama. Also in Ontario.

E

Ctenitis squamigera Hawai'i. .

E

Cyathea dryopteroides Puerto Rico.

C

Cyclosorus boydiae Hawai'i.

E

Diellia erecta Hawai'i. Endemic.

E

Diellia falcata Hawai'i. Endemic.

E

Diellia mannii Hawai'i. Endemic.

E

Diellia pallida Hawai'i. Endemic.

E

Diellia unisora Hawai'i. Endemic.

E

Diplazium molokaiense Hawai'i. Endemic.

E

Doryopteris angelica Hawai'i. .

E

Doryopteris takeuchii Hawai'i. .

E

Dryopteris crinalis var. podosorus Hawai'i. Endemic.

E

Elaphoglossum serpens Puerto Rico. .

E

Marsilea villosa Hawai'i.

C

Microlepia strigosa var. mauiensis Hawai'i.

E

Polystichum aleuticum Alaska. Endemic.

E

Polystichum calderonense Puerto Rico. .

E

Pteris lidgatei Hawai'i. .

E

Tectaria estremerana Puerto Rico. .

E

Thelypteris inabonensis Puerto Rico. .

T

Thelypteris pilosa var. alabamensis Alabama.

E

Thelypteris verecunda Puerto Rico. .

E

Thelypteris yaucoensis Puerto Rico. .

C

Trichomanes punctatum ssp. floridanum Florida. .

Lycophytes

E

Isoetes melanospora Georgia, South Carolina. .

E

Isoetes louisianensis Alabama, Louisiana, Mississippi. .

E

Isoetes tegetiformans Georgia. .

E

Huperzia mannii Hawai'i. .

E

Huperzia natans Hawai'i. .

C

Huperzia stemmermanniae Hawai'i. .

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