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Hymenophyllum obtusum

Hook. & Arn. (1832)

This name is accepted

Kingdom: Viridiplantae Phylum: Pteridophyta Class/Clade: Polypodiopsida Order: Hymenophyllales Family: Hymenophyllaceae Genus: Hymenophyllum

palai lau li‘i

Description

Key Characters:

Growth Form:

Stems:

Roots:

Leaves:

Sori:

Gametophyte:

Ploidy:

Habitat:

Elevation Range:

Historical Distribution

Uses and Culture

USES

Natural History

Statewide Status

Endemic

Island Status

Kaua'i Endemic
O'ahu Endemic
Molokai Endemic
Lana'i Unknown
Maui Endemic
Hawai'i Endemic

Dispersal Agents


Bibliography

Name Published In: Bot. Beechey Voy. 109. 1832; HB. 63. NPfl. 110 (1832)

Other References

Palmer 2003:243 (O, Mo, L, M, H [as Sphaerocionium obtusum]); Ebihara et al. 2006:230/Snow et al. 2011:13 (Syn. S. obtusum = H. obtusum); Wood & Walsh 2022:31 (K); Faccenda, Arthur, et al. 2025:187 (remove L [no evidence of presence])

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Recorded By Record Number Island Source Date
1 Hymenophyllum obtusum unknown: All the Islands Preserved_Specimen BISH
2 Hymenophyllum obtusum unknown: All the Islands Preserved_Specimen BISH
3 Hymenophyllum obtusum Lihue District; Lumahai Valley, along main drainage. Metrosideros lowland wet forest bordered by steep slopes of Dicranopteris and Diplopterygium matting ferns; 90% closed canopy w/ Antidesma platyphyllum var. hillebrandii, Syzygium sandwicensis, Cheirodendron forbesii, Ilex anomala, Dubautia knudsenii, Psychotria mariniana, Kadua affinis, Melicope wawraeana, Melicope feddei. Preserved_Specimen Wood, K.R. 18762 Kauai BISH 2021-07-08
4 Hymenophyllum obtusum Punaluu fallen log across 2ndary stream channel Preserved_Specimen Takeuchi, W.N. 3779 Oahu BISH 1988-02-15
5 Hymenophyllum obtusum Waikane-Schofield Trail, Koolau Mts., Kahana Valley on moss covered tree trunk Preserved_Specimen Wilson, K.A. 52 Oahu BISH 1951-12-02
6 Hymenophyllum obtusum Kipapa Gulch, SE Ridge, Waipio District Metrosideros forest Preserved_Specimen Grant, M.L. 7079 Oahu BISH 1934-07-13
7 Hymenophyllum obtusum Hawaii Volcanoes National Park. Drive up Kulani Prison Rd about 7.4mi toward Kulani Prison from intersection with Kona-Hilo Hwy near Hilo Metrosideros-CIbotium-Pritchardia forest community. Preserved_Specimen Newell, C.L. 311 Hawaii BISH 1966-08-09
8 Hymenophyllum obtusum ridge S of S. Opaeula Gulch, Paalaa, Koolau Mts on mossy trunk, moist woods Preserved_Specimen St.John, H. 13336 Oahu BISH 1933-09-24
9 Hymenophyllum obtusum Waimano Trail On tree trunk in moist rainforest. Preserved_Specimen Bryan Jr., E.H. 1562 Oahu BISH 1941-03-23
10 Hymenophyllum obtusum W Maui, Kahakuloa; Poelua (Keoa Ridge) On a decaying tree trunk on ridge top but protected from sun and wind. Preserved_Specimen Hobdy, R.W. 2117 Maui BISH 1984-05-29
11 Hymenophyllum obtusum S ridge of Kipapa Gulch, Waipio, Koolau Mts On tree trunk Preserved_Specimen Bryan Jr., E.H. Oahu BISH 1932-05-15
12 Hymenophyllum obtusum S. ridge of S. Opaeula Gulch, Koolau Mts., Paaloa Bark of tree-wet forest Preserved_Specimen Fosberg, F.R. 8718 Oahu BISH 1932-09-25
13 Hymenophyllum obtusum S ridge of Kipapa Gulch, Waipio, Koolau Mts moist; mixed with Hymenophyllum recurvum Preserved_Specimen Webster, G.L. 1031 Oahu BISH 1947-10-05
14 Hymenophyllum obtusum Drive down Kona-Hilo Hwy about 6.8miles toward Hilo from Hongo Store. Park car by unpaved rd with chain across entrance (abandoned Farm rd) located at left of Kona-Hilo Hwy. Walk up unpaved rd about 100m. Plant was about 20m NE of rd. (plot 54) Metrosideros-Cibotium forest community. Preserved_Specimen Newell, C.L. 1020 Hawaii BISH 1967-06-26
15 Hymenophyllum obtusum Kipapa Gulch, Waipio, south ridge, Koolau Mts. On tree, in moist gully. Preserved_Specimen Hosaka, E.Y. 934 Oahu BISH 1933-03-05
16 Hymenophyllum obtusum Poamoho Trail Epiphytic near top Preserved_Specimen Degener, O. 27388 Oahu BISH 1961-04-30
17 Hymenophyllum obtusum Mauumae ridge on underside of Metrosideros trunk Preserved_Specimen Takeuchi, W.N. 194 Oahu BISH 1984-06-03
18 Hymenophyllum obtusum W Maui Mnts., Puu Kukui Growing on Metrosideros. Preserved_Specimen Higashino, P.K. 1271 Maui BISH 1976-01-03
19 Hymenophyllum obtusum Olokui NAR, W ridge of Wailau leading up to Olokui plateau, side gulch above Wailele falls Metrosideros-Dicranopteris-Diplopterygium wet forest with Myrisne lessertiana, Freycinetia arborea, Psychotria hawaiiensis, P. mariniana, P. mauiensis, Xylosma hawaiiense, Cheirodendron trigynum, Urera glabra, Pipturus albidus, Boehmeria grandis, Antidesm Preserved_Specimen Wood, K.R. 14809 Molokai BISH 2011-11-16
20 Hymenophyllum obtusum Hanalei District. Limahuli Valley, upper Limahuli preserve. Halfway down 1sr line after Wainiha dropdown going toward fence corner. Montane wet forest Clidemia hirta, Dicranopteris linearis, Psychotria mariniana. On rotting stump of Psychotria (marianiana?) sp. Preserved_Specimen Jensen, K.L. 123 Kauai BISH 2022-01-12
21 Hymenophyllum obtusum Kukuinui Ridge, Wailau Valley on mossy trunk, moist woods Preserved_Specimen St.John, H. 13300 Molokai BISH 1933-07-04
22 Hymenophyllum obtusum East Maui, Koolau FR on koa trunk Preserved_Specimen Hobdy, R.W. 2521 Maui BISH 1986-02-21
23 Hymenophyllum obtusum East Maui, Hana District, Hana Highway, Puakaa State Wayside Indigenous. Growing on Metrosideros polymorpha branch leaning across trail along stream among other epiphytes. Preserved_Specimen Bruegmann, M.M. 191 Maui BISH 1987-02-15
24 Hymenophyllum obtusum S ridge of Kipapa Gulch, Koolau Mts., E of Puu Kamana on wooded ridge, mossy trunk Preserved_Specimen St.John, H. 11687 Oahu BISH 1932-05-15
25 Hymenophyllum obtusum Drive up Kulani Prison Road about 5.4 miles (just before Unit I sign at right of road) toward Kulani Prison from intersection with Kona-Hilo Highway near Hilo; up Kulani Prison Road about 0.4 miles toward Kulani Prison from intersection with Volcano Road Cibotium forest with scattered old Metrosideros Preserved_Specimen Newell, C.L. 902 Hawaii BISH 1967-01-25
26 Hymenophyllum obtusum Puu Kaeo, Waikolu, steep valley wall below on mossy trunk, wet forest Preserved_Specimen St.John, H. 23418 Molokai BISH 1948-12-22
27 Hymenophyllum obtusum Manuahi Ridge (W. side of Pelekunu Valley) Mid to upper parts of steep ridge with primary mixed mesophytic forest of Metrosideros, Psychotria, Ilex, etc. and numerous pteridophytes. Fern covering sheltered side of tree trunk. Locally common. Preserved_Specimen Lorence, D.H. 5464 Molokai BISH 1987-08-02
28 Hymenophyllum obtusum Koolau Mts., Kipapa Ridge Trail on fallen tree over path Preserved_Specimen Herbst, D.R. 349 Oahu BISH 1967-03-04
29 Hymenophyllum obtusum Kalauao Ridge, Koolau Mts. Ewa Forest Res wet forest, under side of leaning tree Preserved_Specimen Fosberg, F.R. 9358 Oahu BISH 1933-03-29
30 Hymenophyllum obtusum S ridge of Kipapa Gulch, Waipio, Koolau Mts on moss covered tree trunk; rain forest Preserved_Specimen Wilson, K.A. 174 Oahu BISH 1952-11-23
31 Hymenophyllum obtusum Kipapa Trail, hunter trail in drainage on N side wet lowland forest; Metrosideros, Acacia, Dicranopteris, Cibotium, Psidium cattleianum; moss covered trunk of Syzygium sandwicensis Preserved_Specimen Reynolds, L.S. 172 Oahu BISH 2006-06-23
32 Hymenophyllum obtusum Trail on ridge E of Mapulehu Valley On mossy tree trunks, rain forest Preserved_Specimen St.John, H. 12852 Molokai BISH 1932-12-29
33 Hymenophyllum obtusum Kamakou Preserve, forest upslope of Pu`u Kolekole near summit, old USFWS transect 7, East Moloka`i. Low stature, montane wet Metrosideros forest with native trees and ferns. Preserved_Specimen Pratt, L.W. 1113 Molokai BISH 1982-05-20
34 Hymenophyllum obtusum Opaeula. Ahupuaa of Kawailoa, Northern Koolau mountains. Epiphytic on Syzygium sandwicense. Covering most of the tree trunk. Also growing with Adenophorus tenellus, A. Tamariscinus, Psilotum x intermedium, Leucobryum gracile, Bazzania cordistipula, Odontoschisma denudata, and others. Preserved_Specimen Thomas, M.K. 752 Oahu BISH 2024-09-26
35 Hymenophyllum obtusum head of Waikolu Valley, Hanalilolilo wet forest, side of gulch, on mossy tree trunk Preserved_Specimen St.John, H. 12439 Molokai BISH 1932-12-21
36 Hymenophyllum obtusum Near Kilauea-Iki crater Dense shade Preserved_Specimen Degener, O. 165 Hawaii BISH 1922-12-15
37 Hymenophyllum obtusum Trail up Waiakeakua-Waiokeela ridge, head of Wailau Valley Wet forest, on trunk of tree Preserved_Specimen Fosberg, F.R. 13476 Molokai BISH 1936-12-29
38 Hymenophyllum obtusum Hanalei District. Kahuamaa Flat, Kokee. Metrosideros-Cheirodendron-Dicranopteris montane wet forest with Polyscias waimeae, P. waialealae, Melicope clusiifolia, Ilex anomala, Bobea brevipes, Nestegis sandwicensis, Scaevola procera, Elaeocarpus bifidus, Xylosma hawaiiense, Syzygium sandwicensis, Psycho Preserved_Specimen Wood, K.R. 18278 Kauai BISH 2019-08-14
39 Hymenophyllum obtusum Pupukea-Paumalu FR under side of mossy bough, woods Preserved_Specimen St.John, H. 10145 Oahu BISH 1930-01-12
40 Hymenophyllum obtusum Kipapa Gulch, Waipio, S. ridge, Koolau Mts On mossy tree trunk Preserved_Specimen Hosaka, E.Y. 1121 Oahu BISH 1933-07-09
41 Hymenophyllum obtusum West Maui; Honolua, along a ridgetop in the vicinity of Puu Kukui Watershed transect station 3.3100 Specimen was situated epiphytically on Metrosideros polymorpha beneath 5-6 meter canopy within Ohia Montane Wet Forest. Associated vegetation: Adenophorus tamariscinus, Grammitis tenella, Mecodium recurvum, Psilotum complanatum, Elaphoglossum crassifolium, Alyxia oliviformis, Ilex anomala, Psychotria mariniana. Preserved_Specimen Meidell, J.S. 266 Maui BISH 1997-12-10
42 Hymenophyllum obtusum Aiea Trail, Kalauao-North Halawa, Koolau Mountains Wet forest. Preserved_Specimen Higgins, N.H. 70 Oahu BISH 1956-01-08
43 Hymenophyllum obtusum Maunawili, e. base Puu Konahuanui, Koolau Mts., Kailua tree trunk in moist forest Preserved_Specimen Fosberg, F.R. 10776 Oahu BISH 1935-01-23
44 Hymenophyllum obtusum Molokai epiphytic in Waikolu gorge Preserved_Specimen Cranwell, L.M. 2588 Molokai BISH 1938-06-24
45 Hymenophyllum obtusum NW slope of Puu Kukui, on ridge above Haelaau Preserved_Specimen Cranwell, L.M. 2747 Maui BISH 1938-08-01
46 Hymenophyllum obtusum Oahu Ad truncos. Preserved_Specimen Baldwin, D.D. 12 Oahu BISH 1859-06-01
47 Hymenophyllum obtusum Nuuanu, along switchback trail to Konahuanui. Southern Koolau Mountains. Epiphytic on Metrosideros polymorpha with Hymenophyllum lanceolatum, Leucobryum gracile, Syrrhopodon gaudichaudii, Adenophorus tamariscinus, Cuspidatula robusta, Plagiochila, and others in mesic/wet forest. Also growing amongst Dicranopteris linearis, Cheirodendron trigynum, Pyrrhobryum pungens, Campylopus hawaiicus, and others. Preserved_Specimen Thomas, M.K. 322 Oahu BISH 2022-04-03
48 Hymenophyllum obtusum E rim of Olokui, W of Wailele Stream, Wailau on wet tree trunk Preserved_Specimen St.John, H. 23265 Molokai BISH 1948-02-04
49 Hymenophyllum obtusum East Maui, Makawao District, Oopuola Epiphytic on lower tree trunks in shade forming dense patches Preserved_Specimen Hobdy, R.W. 1997 Maui BISH 1984-03-01
50 Hymenophyllum obtusum Honolii stream area, Hilo Forest Reserve Asplenium, Cibotium, Dicranopteris, Acacia, Metrosideros, Pelea and Melastoma. Preserved_Specimen Higashino, P.K. 6867 Hawaii BISH 1978-02-03
51 Hymenophyllum obtusum 9 mi SW of HIlo on road to Kulani Prison Virgin montane Rain Forest now being destroyed as part of a forestry program (Metrosideros collina canopy; 2nd story Cibotium spp. (3), with rich fern flora, Selaginella, Cyrtandra, Cheirodendron trigynum, scattered Pritchardia beccariana var. giffardiana groves, Tetraplasandra, Pelea, etc.) Preserved_Specimen Iltis, H.H. 88 Hawaii BISH 1967-06-21
52 Hymenophyllum obtusum Kipapa On wet log Preserved_Specimen Hume, E.P. 88 Oahu BISH 1931-02-15
53 Hymenophyllum obtusum Waikamoi trail Preserved_Specimen Forbes, C.N. 2620 Maui BISH 1920-06-25
54 Hymenophyllum obtusum Palolo-Olympus trail Preserved_Specimen Garber, D.W. 286 Oahu BISH 1920-03-07
55 Hymenophyllum obtusum Kawailoa Preserved_Specimen Forbes, C.N. 2111 Oahu BISH 1915-03-02
56 Hymenophyllum obtusum Hawaii Preserved_Specimen Mann, H. 281 Hawaii BISH 1864-01-01
57 Hymenophyllum obtusum Olaa Flume Preserved_Specimen Forbes, C.N. 671 Hawaii BISH 1915-06-02
58 Hymenophyllum obtusum Palolo. Preserved_Specimen Lyon, H.L. 1186 Oahu BISH 1908-06-14
59 Hymenophyllum obtusum Kahuauli ridge Preserved_Specimen Christophersen, E. 1416 Oahu BISH 1930-12-17
60 Hymenophyllum obtusum Oahu Preserved_Specimen Judd, J.R. 66 Oahu BISH 1888-01-01
61 Hymenophyllum obtusum W Maui, Trail up NW slopes of Puu Kukui Preserved_Specimen Crosby, M.R. 1895 Maui BISH 1964-07-20
62 Hymenophyllum obtusum Ohialele, Pelekunu Preserved_Specimen Hobdy, R.W. 459 Molokai BISH 1979-03-29
63 Hymenophyllum obtusum Pupukea Preserved_Specimen Smith, F.G. 75 Oahu BISH 1929-01-23
64 Hymenophyllum obtusum East Maui, Piinau Valley Preserved_Specimen Hobdy, R.W. 2662 Maui BISH 1987-12-30
65 Hymenophyllum obtusum Kalaupapa; Puu Alii Preserved_Specimen Wysong, M.L. 685 Molokai BISH 2005-03-23
66 Hymenophyllum obtusum Pauoa-Konahuanui trail Preserved_Specimen Garber, D.W. 482 Oahu BISH 1920-07-11
67 Hymenophyllum obtusum Waimalu, E branch Preserved_Specimen Russ, G.W. Oahu BISH 1933-06-08
68 Hymenophyllum obtusum Palolo Crater, Koolau Mts Preserved_Specimen Skottsberg, C.J.F. 921 Oahu BISH 1922-10-25
69 Hymenophyllum obtusum Above Haelaau. Preserved_Specimen Lohman, M.L. Maui BISH 1948-09-12
70 Hymenophyllum obtusum Palolo. Preserved_Specimen Lyon, H.L. Oahu BISH 1919-08-17
71 Hymenophyllum obtusum Pupukea-Malaekahana Trail. Preserved_Specimen Lyon, H.L. Oahu BISH 1926-09-15
72 Hymenophyllum obtusum Kalihi Valley Preserved_Specimen Forbes, C.N. Oahu BISH 1908-10-22
73 Hymenophyllum obtusum East Maui, Kailua Gulch. Preserved_Specimen Lyon, H.L. Maui BISH 1908-11-26
74 Hymenophyllum obtusum Punaluu Valley Preserved_Specimen Rock, J.F.C. Oahu BISH 1908-01-01
75 Hymenophyllum obtusum Koolau Range, Pupukea Army Trail Preserved_Specimen Lyon, H.L. Oahu BISH 1931-07-24
76 Hymenophyllum obtusum Forest near Hilo Preserved_Specimen Newell, Brother M. Hawaii BISH 1910-01-01
77 Hymenophyllum obtusum Punaluu mountains? Preserved_Specimen Forbes, C.N. Oahu BISH 1908-11-14
78 Hymenophyllum obtusum Glenwood. Preserved_Specimen Lyon, H.L. Hawaii BISH 1908-03-20
79 Hymenophyllum obtusum Palolo [Kaau] Crater, west ridge. Preserved_Specimen Lyon, H.L. Oahu BISH 1909-09-12
80 Hymenophyllum obtusum W Maui Mnts Preserved_Specimen U.S. Exploring Expedition Maui BISH 1838-01-01
81 Hymenophyllum obtusum Pupukea Preserved_Specimen Meebold, A. Oahu BISH 1932-05-01
82 Hymenophyllum obtusum unknown Preserved_Specimen Whitney, J.M. BISH 1870-01-01
83 Hymenophyllum obtusum unknown: Oahu or Hawaii (Kona or Kilauea). Preserved_Specimen Lack, F. BISH 1880-01-01
84 Hymenophyllum obtusum unknown Preserved_Specimen Baldwin, D.D. 41 BISH
85 Hymenophyllum obtusum Oahu Preserved_Specimen Mann, H. 281 Oahu BISH 1864-01-01
86 Hymenophyllum obtusum Oahu Preserved_Specimen Krajina, V.J. 27388 Oahu BISH 1961-10-27
87 Hymenophyllum obtusum Pupukea Trail Preserved_Specimen St.John, H. 11625 Oahu BISH 1932-04-17
88 Hymenophyllum obtusum unknown Preserved_Specimen Hillebrand, W.B. BISH
89 Hymenophyllum obtusum District: E Maui, Lower flume, Waikamoi Preserved_Specimen Hobdy, R.W. 580 Maui BISH 1979-05-20
90 Hymenophyllum obtusum Wailau Trail Preserved_Specimen Forbes, C.N. 347 Molokai BISH 1912-08-01
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