American Samoa is at No 15 in the ferniest places in the World
It also has a large number of ferns (152)
There is more information about the botany of these islands here, including 2 useful reports by Dr. W. Arthur Whistler:
Technical Report 83: botanical inventory of the proposed Ta’u unit of the national park of American Samoa; February 1992
Technical report 87: botanical inventory of the proposed Tutuila and Ofu units of the national park of American Samoa; April 1994
The following maps are taken from Technical Report 83
This table was extracted from the website
| Scientific Name | Abundance |
|---|---|
| Acrostichum aureum | Common |
| Adiantum pedatum | Rare |
| Adiantum philippense | Uncommon |
| Angiopteris evecta | Common |
| Angiopteris opaca | Occasional |
| Antrophyum alatum | Occasional |
| Antrophyum plantagineum | Occasional |
| Arachniodes aristata | Uncommon |
| Arthropteris repens | Common |
| Asplenium australasicum | Common |
| Asplenium cuneatum | Occasional |
| Asplenium feejeense | Occasional |
| Asplenium horridum | Uncommon |
| Asplenium insiticium | Uncommon |
| Asplenium laserpitiifolium | Occasional |
| Asplenium marattioides | Occasional |
| Asplenium multifidum | Occasional |
| Asplenium nidus | Common |
| Asplenium polyodon | Common |
| Asplenium powellii | Uncommon |
| Asplenium tenerum | Uncommon |
| Asplenium unilaterale | Rare |
| Bolbitis palustris | Occasional |
| Calymmodon latealatus | Rare |
| Christella dentata | Uncommon |
| Christella harveyi | Common |
| Christella pacifica | Uncommon |
| Christella parasitica | Occasional |
| Christella subjuncta | Uncommon |
| Coryphopteris sp. | Common |
| Ctenitis samoensis | Rare |
| Ctenopteris blechnoides | Occasional |
| Ctenopteris contigua | Uncommon |
| Ctenopteris seemannii | Occasional |
| Ctenopteris tenuisecta | Uncommon |
| Cyathea | Common |
| Cyathea decurrens | Common |
| Cyathea lunulata | Common |
| Cyathea truncata | Common |
| Cyathea vaupelii | Occasional |
| Cyclosorus interruptus | Abundant |
| Davallia epiphylla | Common |
| Davallia graeffei | Uncommon |
| Davallia heterophylla | Occasional |
| Davallia plumosa | Uncommon |
| Davallia repens | Uncommon |
| Davallia sessilifolia | Uncommon |
| Davallia solida var. solida | Common |
| Dennstaedtia sp. | |
| Dicranopteris linearis | Occasional |
| Diplazium bulbiferum | Uncommon |
| Diplazium dilatatum | Uncommon |
| Diplazium harpeodes | Uncommon |
| Diplazium proliferum | Uncommon |
| Dipteris conjugata | Abundant |
| Dryopteris arborescens | Occasional |
| Elaphoglossum feejeense | Uncommon |
| Elaphoglossum reineckei | Occasional |
| Grammitis conformis | Uncommon |
| Grammitis hookeri = Polypodium hookeri | Uncommon |
| Haplopteris elongata | Occasional |
| Haplopteris scolopendrina | Uncommon |
| Histiopteris incisa | Common |
| Humata heterophylla | Common |
| Humata polypodioides | Uncommon |
| Humata serrata | Uncommon |
| Hypolepis aspidioides | Occasional |
| Hypolepis tenuifolia | Uncommon |
| Lastreopsis davallioides | Occasional |
| Lindsaea ensifolia ssp. agatii | Occasional |
| Lindsaea harveyi | Uncommon |
| Lindsaea pacifica | Occasional |
| Lindsaea pulchra | Uncommon |
| Lindsaea repens | Uncommon |
| Lindsaea tetragona | Rare |
| Lomagramma cordipinna | Common |
| Lunathyrium japonicum | Uncommon |
| Lycopodium carinatum | Uncommon |
| Lycopodium cernum = Lycopodiella cerna | Uncommon |
| Lycopodium phlegmaria = Huperzia mannii | Uncommon |
| Lycopodium squarrosum | Uncommon |
| Lycopodium sp. | Uncommon |
| Macrothelypteris polypodioides | Occasional |
| Macrothelypteris torresiana | Occasional |
| Marattia smithii | Uncommon |
| Microlepia speluncae | Occasional |
| Microsorium sylvaticum | Occasional |
| Nephrolepis biserrata | Common |
| Nephrolepis hirsutula | Common |
| Oleandra neriiformis | Occasional |
| Ophioglossum pendulum | Uncommon |
| Ophioglossum reticulatum | Rare |
| Ophioglossum reticulatum var. pacifica | Uncommon |
| Orthiopteris tenuis | Rare |
| Phymatosaurus grossus = P. scolopendria | Common |
| Phymatosaurus nigrescens | Occasional |
| Pityrogramma brackenridgei | Uncommon |
| Pleocnemia leuzeana | Occasional |
| Plesioneuron attenuatum | Occasional |
| Pneumatopteris | Uncommon |
| Pneumatopteris bryanii | Uncommon |
| Pneumatopteris costata | Rare |
| Pneumatopteris glandulifera | Occasional |
| Pneumatopteris magnifica | Common |
| Pneumatopteris rodigesiana | Uncommon |
| Pneumatopteris transversaria | Uncommon |
| Polypodium nigrescens | Uncommon |
| Polypodium subauriculatum | Uncommon |
| Polystichum aculeatum | Rare |
| Psilotum complanatum | Uncommon |
| Pteris comans | Occasional |
| Pteris ensiformis | Occasional |
| Pteris pacifica | Occasional |
| Pteris tripartita | Occasional |
| Pteris vaupelii | Uncommon |
| Pyrrosia adnascens | Common |
| Pyrrosia lanceolata | Common |
| Selaginella laxa | Uncommon |
| Selaginella whitmeei | Occasional |
| Sphaerostephanos invisus | Occasional |
| Sphaerostephanos reineckei | Uncommon |
| Sphaerostephanos unitus | Uncommon |
| Sphenomeris chinensis | Uncommon |
| Tectaria chrysotricha | Uncommon |
| Tectaria decurrens | Occasional |
| Tectaria setchellii | Occasional |
| Tectaria stearnsii | Common |
| Vaginularia angustissima | Occasional |
| Vittaria elongata = Haplopteris elongata | Occasional |
| Vittaria scolopendrina | Uncommon |
