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Adiantum trapeziforme

L. (1753)

This name is accepted

Kingdom: Viridiplantae Phylum: Pteridophyta Class/Clade: Polypodiopsida Order: Polypodiales Family: Pteridaceae Genus: Adiantum

diamond maidenhair, giant maidenhair

Description

Key Characters:

Growth Form:

Stems:

Roots:

Leaves:

Sori:

Gametophyte:

Ploidy:

Habitat:

Elevation Range:

Historical Distribution

Uses and Culture

USES

Natural History

Statewide Status

Naturalized

Island Status

O'ahu Naturalized

Dispersal Agents


Specimens

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Bibliography

Name Published In: Sp. Pl.: 1097 (1753)

Other References

Staples & Herbst 2005:47 (KEY), 50 (DESCR); Frohlich & Lau 2020:62 (NEWNAT/O, DESCR)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Adiantum trapeziforme Garden of V.H. Duker, Honolulu Preserved_Specimen Fosberg, F.R. 9379 Oahu BISH 1933-04-01
2 Adiantum trapeziforme Kahaluu. Subdrainage near confluence with main Kahaluu stream. 3 mature plants along gulch wall. Preserved_Specimen Kawelo, K. 597 Oahu BISH 2025-09-06
3 Adiantum trapeziforme unknown Preserved_Specimen BISH
4 Adiantum trapeziforme 3746 Pukulani St. Honolulu Preserved_Specimen Suehiro, A. Oahu BISH 1945-12-26
5 Adiantum trapeziforme Honolulu, 3746 Pukulani St Preserved_Specimen Suehiro, A. Oahu BISH 1945-12-26
6 Adiantum trapeziforme Kalauao Falls trail. UTM: 614507, 2367346. Mesic non-native forest. Preserved_Specimen Erect to arching terrestrail fern to about a meter tall, rhizomatous. 4x pinnate atbase, segments green above, paler below. Kawelo, K. 408 Oahu BISH 2016-01-29
7 Adiantum trapeziforme Kaneohe. 47-532 Pulama Rd. (Private land holding) Widely cultivated, usually escaped Preserved_Specimen Perennial fern to 1.5m. Annable, C.R. 3939 Oahu BISH 1999-03-18
8 Adiantum trapeziforme Manoa falls trail near trailhead. Ahupuaa of Waikiki. Growing under Angiopteris evecta on shaded slope. Growing with Blechnum appendiculatum, Oplismenus hirtellus, Miconia crenata, Begonia hirtella, and other weeds. Preserved_Specimen Large plants with short creeping rhizomes. Stipes long, narrow, black, and shiny. Frond 4 pinnate with stalked ultimate segments that are trapezoid shaped. Ultimate segments serrated along upper margins. Sori protruding from toothed sections. Thomas, M.K. 461 Oahu BISH 2022-10-17
9 Adiantum trapeziforme Manoa falls trail near trailhead. Ahupuaa of Waikiki. Growing under Angiopteris evecta on shaded slope. Growing with Blechnum appendiculatum, Oplismenus hirtellus, Miconia crenata, Begonia hirtella, and other weeds. Preserved_Specimen Large plants with short creeping rhizomes. Stipes long, narrow, black, and shiny. Frond 4 pinnate with stalked ultimate segments that are trapezoid shaped. Ultimate segments serrated along upper margins. Sori protruding from toothed sections. Thomas, M.K. 461 Oahu BISH 2022-10-17
10 Adiantum trapeziforme Manoa falls trail near trailhead. Ahupuaa of Waikiki. Growing under Angiopteris evecta on shaded slope. Growing with Blechnum appendiculatum, Oplismenus hirtellus, Miconia crenata, Begonia hirtella, and other weeds. Preserved_Specimen Large plants with short creeping rhizomes. Stipes long, narrow, black, and shiny. Frond 4 pinnate with stalked ultimate segments that are trapezoid shaped. Ultimate segments serrated along upper margins. Sori protruding from toothed sections. Thomas, M.K. 461 Oahu BISH 2023-10-17
11 Adiantum trapeziforme Kahaluu. Subdrainage near confluence with main Kahaluu stream. 3 mature plants along gulch wall. Preserved_Specimen Kawelo, K. 597 Oahu BISH 2025-09-06
12 Adiantum trapeziforme Lyon Arboretum growing on floor of palm house. Growing with Tectaria incisa, Begonia spp., Miconia crenata, and other weeds. Preserved_Specimen Small plants emerging, some larger (roughly 0.5 m tall). Segments trapezoidal-rhomboidal. Sori in linear false indusia. Stems shiny, nearly black. Thomas, M.K. 581 Oahu BISH 2023-05-01
13 Adiantum trapeziforme Kahaluu. Subdrainage near confluence with main Kahaluu stream. 3 mature plants along gulch wall. Preserved_Specimen Kawelo, K. 597 Oahu BISH 2025-09-06
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