Juncus planifolius

R.Br. (1810)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Monocots Order: Poales Family: Juncaceae Genus: Juncus

bog rush, broadleaf rush, broad-leaved rush, rush

Description

Key Characters:

Growth Form: Perennial herbs.

Stems: Stems 1–3 dm long, cespitose.

Roots:

Leaves: Leaves simple. Leaves numerous, basal. Blades linear, much shorter than stems, flat, grass-like, with flattened side toward stem. Margins entire. Sheathing, margins of sheaths hyaline, not prolonged into auricles. Stipules absent.

Flowers: Flowers in 2 to numerous glomerules on strict branches, forming umbellately branched cymes, lowest bract usually not extending more than ⅓ length of inflorescence. Flowers bisexual (perfect). Outer perianth parts uniformly dark. Inner perianth with 2 dark purplish lines, ca. 2 mm long, longer than outer ones, margins inflexed, apex obtuse. Stamens 3; filaments at least 3 times longer than anthers. Pollen grains remaining in tetrads, surrounded by a common exine. Ovary superior, carpels 1.

Fruit: Capsules obovoid; trigonous; mucronate; longer than to equaling perianth; often transversely wrinkled. Seeds pale brown; shiny; ovoid; ca. 4 mm long; minutely reticulate.

Ploidy:

Habitat: Naturalized in moist; open; disturbed depressions on margins of forest and in bogs.

Elevation Range: 850–1,300 m.

Historical Distribution

Uses and Culture

USES

Natural History

Statewide Status

Naturalized

Island Status

Kaua'i Naturalized
O'ahu Naturalized
Molokai Naturalized
Lana'i Naturalized
Maui Naturalized
Hawai'i Naturalized

Dispersal Agents


Pollinators

Bibliography

Name Published In: Prodr. Fl. Nov. Holland.: 259 (1810)

Other References

Wagner et al. 1990:1453 (K, O, Mo, M, H); Oppenheimer & Bartlett 2002:9 (L); Faccenda, Arthur, et al. 2025:188 (KEY)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Juncus planifolius Kohala Mts., access rd. above Waikoloa reservoirs #1 & 2, to upper Hamakua ditch Preserved_Specimen Wagner, W.L. 5520 Hawaii BISH 1985-06-23
2 Juncus planifolius East Maui, Kaumakani fence between tags 8-9 Preserved_Specimen Common name: broadleaf rush Welton, P. 1933 Maui BISH 1997-07-02
3 Juncus planifolius East Maui, Lower Shelf of Kipahulu Valley at Delta Camp shelter Preserved_Specimen Welton, P. 1929 Maui BISH 1997-06-16
4 Juncus planifolius Near beginning of Hanalilolilo Trail, Kamakou Preserve (Nature Conservancy) Preserved_Specimen Wagner, W.L. 5401 Molokai BISH 1984-07-17
5 Juncus planifolius Puna Preserved_Specimen Stone, B.C. 3068 Hawaii BISH 1959-06-01
6 Juncus planifolius Upper Waiakea Forest Reserve, along Disappointment Trail (Puu Makaala access rd.) off of Kulani Rd. (Stainback Hwy) Preserved_Specimen Wagner, W.L. 5262 Hawaii BISH 1984-02-28
7 Juncus planifolius Piihonua; Hilo Forest Reserve, Site 01 OS Stunted ohia wetland dieback; primary vegetation: Metrosideros polymorpha (occasionally pubescent), Myrsine lessertiana, Cheirodendron trigynum and Styphelia tameiameiae. Soil a shallow to moderately deep poorly drained organic. Preserved_Specimen Adee, K.T. Hawaii BISH
8 Juncus planifolius Near beginning of Hanalilolilo Trail, Kamakou Preserve (Nature Conservancy) Preserved_Specimen Wagner, W.L. 5408 Molokai BISH 1984-07-17
9 Juncus planifolius Puu Makaala Preserved_Specimen Adee, K.T. Hawaii BISH 1979-01-29
10 Juncus planifolius Wailuku River Trail Preserved_Specimen Adee, K.T. Hawaii BISH 1978-04-03
11 Juncus planifolius Waikamoi Flume, road's end Preserved_Specimen Gagné, B.H. Maui BISH 1999-07-16
12 Juncus planifolius Kulani; pahoehoe Preserved_Specimen Adee, K.T. Hawaii BISH 1978-09-25
13 Juncus planifolius Proposed Puu Ohu Reservoir, Kohala Mts Preserved_Specimen Corn, C. Hawaii BISH 1984-03-27
14 Juncus planifolius South Hilo District, Waiakea. Collected along Stainback Highway corridor Preserved_Specimen Funk, E.J. Hawaii BISH 1999-04-23
15 Juncus planifolius Upper Waiakea Forest Reserve. Site 357-11 Preserved_Specimen Adee, K.T. Hawaii BISH 1978-03-30
16 Juncus planifolius Proposed Puu Ohu Reservoir, Kohala Mountains Preserved_Specimen Corn, C. Hawaii BISH 1984-03-27
17 Juncus planifolius Wailuku River Trail Preserved_Specimen Adee, K.T. Hawaii BISH 1978-04-03
18 Juncus planifolius 218-4 Pahoehoe flow; Kulani Preserved_Specimen Adee, K.T. Hawaii BISH 1978-09-25
19 Juncus planifolius Kau District, Kilauea Forest Reserve. By IPS Study site Growing in open conditions. Preserved_Specimen Herat, T. 995 Hawaii BISH 1974-07-08
20 Juncus planifolius East Maui, Waihoi Bog Among Oreobolus and Rhacomitrium hummocks. Preserved_Specimen Hobdy, R.W. 2586 Maui BISH 1986-07-11
21 Juncus planifolius Piihonua; Hilo Forest Reserve, Site 06 OS Stunted ohia wetland dieback; assoc. spp.: Metrosideros polymorpha (occasionally pubescent), Myrsine lessertiana, Cheirodendron trigynum, Styphelia tameiameiae & Dicranopteris sp. Soil a shallow to moderately deep poorly drained organic/ash. Preserved_Specimen Adee, K.T. Hawaii BISH
22 Juncus planifolius Pepeopae Bog, Nature Conservancy preserve Growing along boardwalk, in open, boggy area with sedges such as Machaerina and dwarf Metrosideros and other native shrubs. Preserved_Specimen Herb, leaf bases pink. Alien weed, spreading and becoming naturalized locally. Lorence, D.H. 6323 Molokai BISH 1989-01-12
23 Juncus planifolius Wailuku River Wet Metrosideros rain forest, on wet bank near pool. Preserved_Specimen Wagner, W.L. 4873 Hawaii BISH 1983-07-27
24 Juncus planifolius Mt. Kaala Bog area, Waianae Mt. Range Athyrium, Cibotium, Dryopteris, Cheirodendron, Metrosideros, Myrsine and Pelea. Preserved_Specimen Higashino, P.K. 5327 Oahu BISH 1976-02-08
25 Juncus planifolius Kawaihau District: Near Mt. Wekiu. Makaleha Mts Common in grasses, esp. along ridge. Preserved_Specimen Nagata, K.M. 2858 Kauai BISH 1984-03-18
26 Juncus planifolius Circle bog Collected in open vegetation with inumdated soils along fenceline. Low growing shrubs and trees along edgtes include Melicope clusiifolia, Metrosideros polymorpha, Cheirodendron platyphyllum, and Dicranopteris. Preserved_Specimen Sedge-like rush, 20 - 30 cm tall with reddish leaf blades. Trauernicht, C. 511 Kauai BISH 2008-06-01
27 Juncus planifolius Piihonua; Hilo Forest Reserve, Site 23 OS Stunted ohia wetland dieback; assoc. spp.: Metrosideros polymorpha (occasionally pubescent), Myrsine lessertiana, Cheirodendron trigynum, Styphelia tameiameiae & Dicranopteris sp. Soil a shallow to moderately deep poorly drained organic/ash. Preserved_Specimen Adee, K.T. Hawaii BISH 1978-09-26
28 Juncus planifolius Keauhou Ranch, Kau District near the Kilauea Forest boundary Collected growing in a bog as the dominant plant. Preserved_Specimen A rush, 15in height. Clarke, G. 475 Hawaii BISH 1980-07-22
29 Juncus planifolius Waahila Ridge, St. Louis Heights Dr., Oahu, Hawaii Growing in shadey spot along side the trail to the summit. Preserved_Specimen Clumping sedge, highly divided inflorescence. Crago, L.M. 2005136 Oahu BISH 2005-05-16
30 Juncus planifolius Kaapaku, Ohia LZ, near cabin. Boggy Metrosideros wet forest. Preserved_Specimen Looks different from other rushes. Not much of it. Starr, F. 9020202 Maui BISH 2009-02-02
31 Juncus planifolius Along Blair road, Laupahoehoe Disturbed area. Preserved_Specimen Herbst, D.R. 1852 Hawaii BISH 1970-07-22
32 Juncus planifolius Kokee State Park, Kauai, Hawaii Growing just left of the boardwalk on the way in to the bog, in very wet, mucky soil. Preserved_Specimen Clumping sedge, tall inflorescence with ball like clusters of spikelets. Crago, L.M. 2005169 Kauai BISH 2005-08-03
33 Juncus planifolius Poamoho. Ahupuaa of Paalaa, Northern Koolau mountains. Growing along trail in muddy area with Rhyncospora caduca, Conyza, Lindsaea ensifolia, Deparia petersenii, and Cyperus meyenianus. Also growing with Odontosoria chinensis, Dicranopteris linearis, Blechnopsis orientalis, Christella parasitica, Cibotium chamissoi, Sadleria souleyetiana, Sadleria pallida, Metrosideros polymorpha, Acacia koa, Psychotria mariniana, Bobea elatior, Antidesma platyphyllum, Psidium cattleianum, Wikstroemia oahuensis, Scaevola gaudichaudiana, and others. Preserved_Specimen Plant being eaten by some caterpillar. Thomas, M.K. 676 Oahu BISH 2024-06-06
34 Juncus planifolius Puu Kolekole Trail. Plants were at the end of the forest road at the beginning of the Puu Kolekole Trail; on the road surface On road surface. Preserved_Specimen Hobdy, R.W. 3076 Molokai BISH 1989-08-10
35 Juncus planifolius Waimea District: Alakai Wilderness Preserve. Around Waialeale summit and 1 mi to W Metrosideros, Dubautia, Oreobolus, montane wet mixed communities w/Rhynchospora rugosa ssp. lavarum, Campylopus, Plantago, Cheirodendron, Tetraplasandra, Myrsine, Cyanea, Trematolobelia, Lobelia, Cyrtandra, Juncus, Stenogyne, Hedyotis, Ilex, Eurya, Bidens, Melicope, Labordia, Coprosma, and various bryophytes. Preserved_Specimen Lvs bright green, redder at base. Wood, K.R. 130 Kauai BISH 1988-08-23
36 Juncus planifolius East Maui, Hana District, Hana Forest Reserve, Hana Ranch lands, muddy wetland W of Kaihuakala Open disturbed grassland/sedgeland dominated by Paspalum conjugatum, P. urvillei, and Sacciolepis indica, with Cyperus polystachyos, Tibouchina herbacea, Kyllinga brevifolia, Ageratina adenophora. Preserved_Specimen Rare sedge. Imada, C. 200260 Maui BISH 2002-11-04
37 Juncus planifolius Kona-Hilo Hwy ca. 6.8 mi toward Hilo from Hongo Store. Park car by unpaved road with chain across entrance (Abandoned Farm Road) located at left of Kona-Hilo Hwy. Walk up unpaved road ca. 100 m., about 20 m. NE (right side) of road (plot 54) Along roadside. Metrosideros-Cibotium forest community. Preserved_Specimen Newell, C.L. 1006 Hawaii BISH 1967-06-26
38 Juncus planifolius Piihonua; Hilo Forest Reserve, Site 25 OS Stunted ohia wetland dieback; assoc. spp.: Metrosideros polymorpha (occasionally pubescent), Myrsine lessertiana, Cheirodendron trigynum, Styphelia tameiameiae & Dicranopteris sp. Soil a shallow to moderately deep poorly drained organic/ash. Preserved_Specimen Adee, K.T. Hawaii BISH 1979-07-03
39 Juncus planifolius Kau Forest Reserve, Mt. House Trail Common along roadside. Wet w/ tree ferns, Metrosideros, Tibouchina Preserved_Specimen Herbst, D.R. 200 Hawaii BISH 1966-08-04
40 Juncus planifolius Kulani Prison Road; 4 mi E of Kulani In disturbed area along road. Preserved_Specimen Henrickson, J.S. 4120 Hawaii BISH 1969-08-07
41 Juncus planifolius Keauhou Ranch, Kau District near the Kilauea Forest boundary Collected growing in a bog. Preserved_Specimen Dominant plant at 15 height. Clarke, G. 475 Hawaii BISH 1980-07-22
42 Juncus planifolius W Maui, Up trail from Haelaau Cabin at transect station 4.6250 Mesic forest. Preserved_Specimen Perennial herb to 60cm. Annable, C.R. 3853 Maui BISH 1998-03-05
43 Juncus planifolius Waianae Range, Mt. Kaala Abundant in summit bog. Preserved_Specimen Tufted herb, 30 cm. van Balgooy, M.M.J. 4181 Oahu BISH 1982-05-27
44 Juncus planifolius Kokee State Park, Kauai, Hawaii Growing just left of the boardwalk on the way in to the bog, in very wet, mucky soil. Preserved_Specimen Clumping sedge, tall inflorescence with ball like clusters of spikelets. Crago, L.M. 2005170 Kauai BISH 2005-08-03
45 Juncus planifolius Umikoa Ranch, Hamakua c.1 acre stock pond, montane wet pasture, some koa. Preserved_Specimen As specimen Uyehara, K.J. 99092703 Hawaii BISH 1999-09-27
46 Juncus planifolius East Maui, between Forest Reserve gate and road to lower Olinda Flume, Waikamoi Abundant on forestry road through woods. Preserved_Specimen Growing in clumps. Crosby, M.R. 1812 Maui BISH 1964-07-19
47 Juncus planifolius Piihonua; Hilo Forest Reserve, Site 06 OS Stunted ohia wetland dieback; assoc. spp.: Metrosideros polymorpha (occasionally pubescent), Myrsine lessertiana, Cheirodendron trigynum, Styphelia tameiameiae & Dicranopteris sp. Soil a shallow to moderately deep poorly drained organic/ash. Preserved_Specimen Adee, K.T. Hawaii BISH
48 Juncus planifolius Piihonua; Hilo Forest Reserve, Site 09 OS Ohia wetland dieback. Primary vegetation: Metrosideros polymorpha, Acacia koa, Cheirodendron trigynum, Myrsine lessertiana, Ilex anomala and Coprosma spp. Soil a shallow poorly drained organic found on a pahoehoe flow. Preserved_Specimen Adee, K.T. Hawaii BISH
49 Juncus planifolius Headwaters of N fork of Wailua River, area called The Blue Hole or The Crater, just E of Mt. Waialeale and Kawaikini Deep valley surrounded by steep cliffs laced w/waterfalls; low primary vegetation of small, stunted trees 1-2 m tall, numerous pteridophytes and Gunnera over saturated, rocky ground. Wet ground. Preserved_Specimen Herb growing in scattered clumps, infl brownish. Common locally. Lorence, D.H. 5317 Kauai BISH 1987-08-23
50 Juncus planifolius Piihonua; Hilo Forest Reserve, Site 25 OS Stunted ohia wetland dieback; assoc. spp.: Metrosideros polymorpha (occasionally pubescent), Myrsine lessertiana, Cheirodendron trigynum, Styphelia tameiameiae & Dicranopteris sp. Soil a shallow to moderately deep poorly drained organic/ash. Preserved_Specimen Adee, K.T. Hawaii BISH 1978-10-23
51 Juncus planifolius Kona-Hilo Hwy ca. 6.8 mi toward Hilo from Hongo Store. Park car by unpaved road w/chain across entrance (Abandoned Farm Road) located at left of Kona-Hilo Hwy. Walk up unpaved road ca. 100 m. Plant was about 20 m. NE (right side) of road. (plot 54) Metrosideros-Cibotium forest community. Preserved_Specimen Newell, C.L. 1007 Hawaii BISH 1967-06-26
52 Juncus planifolius Piihonua; Hilo Forest Reserve, Site 23 OS Stunted ohia wetland dieback; assoc. spp.: Metrosideros polymorpha (occasionally pubescent), Myrsine lessertiana, Cheirodendron trigynum, Styphelia tameiameiae & Dicranopteris sp. Soil a shallow to moderately deep poorly drained organic/ash. Preserved_Specimen Adee, K.T. Hawaii BISH 1979-06-23
53 Juncus planifolius Waialua/Wahiawa Districts: Koolau Mts., Kawailoa/Ewa Forest Reserves, Poamoho Ridge Trail Wet muddy areas on trail. Preserved_Specimen Lammers, T.G. 5500 Oahu BISH 1984-06-16
54 Juncus planifolius Olaa Tract: Pig Hunter's Trail at bend in road Growing along edge of forest in moist depressions. Preserved_Specimen Sohmer, S.H. 11788 Hawaii BISH 1981-03-28
55 Juncus planifolius Alakai Swamp, Waialeale summit area In wet spots, rivulets, etc. in lower parts of summit area. Preserved_Specimen Bushy herb up to 30 cm. high. Lvs and peduncle light green. Bracts and flowers brown. van Royen, P. 11725 Kauai BISH 1977-09-03
56 Juncus planifolius Approx. 4 mi below Kulani Prison, along Kulani Prison Rd Growing on exposed, bulldozed area along road. Preserved_Specimen Herbst, D.R. 373 Hawaii BISH 1967-03-26
57 Juncus planifolius Kokee State Park, along Alakai Swamp Trail from jct. w/Pihea Trail to Kilohana In bog. Preserved_Specimen Wagner, W.L. 5042 Kauai BISH 1983-08-30
58 Juncus planifolius Thurston Lava Tube Local, few plants on edge of path in Metrosideros-Cibotium forest. Preserved_Specimen Fosberg, F.R. 55482 Hawaii BISH 1974-04-25
59 Juncus planifolius Kau Forest Reserve, Mt. House Trail Common along roadside. Wet w/ tree ferns, Metrosideros, Tibouchina Preserved_Specimen Herbst, D.R. 201 Hawaii BISH 1966-08-04
60 Juncus planifolius East Maui, Makawao District, along Waikamoi Flume Wet ohia rain forest. Preserved_Specimen Wagner, W.L. 4791 Maui BISH 1983-01-15
61 Juncus planifolius Bog S of the Wailuku River, Hilo Forest Reserve, South Hilo District Growing in a bog with Juncus effusus, Andropogon, Carex, and Scirpus. Preserved_Specimen At the height of 2 feet, and with it's excellent vigor, this is a dominant part of the bog vegetation. Clarke, G. 594 Hawaii BISH 1981-05-20
62 Juncus planifolius W Maui, Lahaina District, Puu Kukui, along trail at edge of top bog Growing w. Juncus effusus. Preserved_Specimen Oppenheimer, H.L. 70105 Maui BISH 2001-07-06
63 Juncus planifolius S Kona District, Upper Waiakea Forest Reserve. Poer Line Road, Pole 27, Transect 26, ca. 2 mi S of jct w/Saddle Rd. Kau silversword bog, ca. 2.25 mi E of road Infrequent in bog proper. Associated w/Carex, Rhynchospora, Plantago, Deschampsia, Lycopodium, Panicum, Sphagnum, etc. Preserved_Specimen Gustafson, R. 2393 Hawaii BISH 1981-07-21
64 Juncus planifolius East Maui, Kipahulu Valley, Midcamp Bog Occurring in disturbed parts of bog. Preserved_Specimen Wagner, W.L. 5886 Maui BISH 1988-03-09
65 Juncus planifolius Puna District, Volcano Growing along highway. Abundant. Preserved_Specimen Herbst, D.R. 5524 Hawaii BISH 1975-10-21
66 Juncus planifolius Piihonua; Hilo Forest Reserve, Site 23 OS Stunted ohia wetland dieback; assoc. spp.: Metrosideros polymorpha (occasionally pubescent), Myrsine lessertiana, Cheirodendron trigynum, Styphelia tameiameiae & Dicranopteris sp. Soil a shallow to moderately deep poorly drained organic/ash. Preserved_Specimen Adee, K.T. Hawaii BISH 1978-09-27
67 Juncus planifolius Piihonua; Hilo Forest Reserve, Site 35 OS Stunted ohia wetland dieback; assoc. spp.: Metrosideros polymorpha, Ilex anomala, Myrsine lessertiana, M. sandwicensis, Cheirodendron trigynum & Pelea clusiifolia. Soil a moderately deep yet poorly drained organic/ash found on a pahoehoe flow. Preserved_Specimen Adee, K.T. Hawaii BISH 1979-04-03
68 Juncus planifolius Kilauea, Rim Road, between Lava Lake and Cut-off Road On road shoulders. Preserved_Specimen Olson, G.E. Hawaii BISH 1941-05-15
69 Juncus planifolius Piihonua; Hilo Forest Reserve, Site 01 OS Stunted ohia wetland dieback; primary vegetation: Metrosideros polymorpha, Acacia koa on well drained hummocks, Ilex anomala, Coprosma spp., Gouldia sp., Pelea clusiifolia & Myrsine lessertiana. Soil an extremely shallow poorly drained organic/ash. Preserved_Specimen Adee, K.T. Hawaii BISH
70 Juncus planifolius Kau Forest Reserve, Mt. House Trail Common along roadside. Wet w/ tree ferns, Metrosideros, Tibouchina Preserved_Specimen Herbst, D.R. 197 Hawaii BISH 1966-08-04
71 Juncus planifolius Crater Rim road near Lava Tube Frequent along road. Preserved_Specimen Fagerlund, G.O. 564 Hawaii BISH 1943-05-23
72 Juncus planifolius Ascent to Konahuanui From very moist soil along trail, edges of standing water Preserved_Specimen Faccenda, K. 2048 Oahu BISH 2021-07-11
73 Juncus planifolius Mauka of Kulani Prison Common in clearings. Preserved_Specimen Degener, O. 21835 Hawaii BISH 1952-02-15
74 Juncus planifolius W slope of Mt. Kahili (above Wahiawa Bog) In disturbed rainforest w/many downed, moss-covered logs; growing w/ `ohi`a, Cyanea, Gouldia, Psychotria, incl/guava, Melastoma, Erechtites valerianifolia. Preserved_Specimen Wagner, W.L. 5383 Kauai BISH 1984-05-28
75 Juncus planifolius Bog S of the Wailuku River, Hilo Forest Reserve, South Hilo District Abundant in a large bog. Growing with Andropogon, Luzula, Scirpus, and Carex. Preserved_Specimen A rush. Clarke, G. 610 Hawaii BISH 1981-05-20
76 Juncus planifolius Road to Kulani Prison Camp, 8 mi below Prison Camp Common in excavated area at side of road in dense, wet Metrosideros forest on old lava. Preserved_Specimen Fosberg, F.R. 41552 Hawaii BISH 1961-03-18
77 Juncus planifolius Near 27 mi., Glenwood Naturalized in swamp in 3 in. of water. Preserved_Specimen Degener, O. 10304 Hawaii BISH 1930-01-13
78 Juncus planifolius Olaa Tract: Pig Hunter's Trail at bend in road Growing along edge of forest path in moist depressions. Preserved_Specimen Sohmer, S.H. 11787 Hawaii BISH 1981-03-28
79 Juncus planifolius Piihonua; Hilo Forest Reserve, Site 23 OS Stunted ohia wetland dieback; assoc. spp.: Metrosideros polymorpha, Ilex anomala, Myrsine lessertiana, M. sandwicensis, Cheirodendron trigynum & Pelea clusiifolia. Soil a moderately deep yet poorly drained organic/ash found on a pahoehoe flow. Preserved_Specimen Adee, K.T. Hawaii BISH 1978-09-27
80 Juncus planifolius Piihonua; Hilo Forest Reserve, Site 23 OS Stunted ohia wetland dieback; assoc. spp.: Metrosideros polymorpha (occasionally pubescent), Myrsine lessertiana, Cheirodendron trigynum, Styphelia tameiameiae & Dicranopteris sp. Soil a shallow to moderately deep poorly drained organic/ash Preserved_Specimen Adee, K.T. Hawaii BISH 1978-09-26
81 Juncus planifolius Munro Trail, N side of Lanaihale Preserved_Specimen Oppenheimer, H.L. 109925 Lanai BISH 1999-10-25
82 Juncus planifolius Waahila Ridge, St. Louis Heights Dr., Oahu, Hawaii OBSERVATION Curtis Daehler Oahu HAPI 3/21/2007
83 Juncus planifolius Piihonua; Hilo Forest Reserve, Site 22 OS Open healthy forest; assoc. spp.: Metrosideros polymorpha, Ilex anomala, Gouldia sp., Pelea clusiifolia, Cheirodendron trigynum, Myrsine lessertiana, Freycinetia arborea, Alyxia oliviformis. Soil a deep moderately well drained ash. Preserved_Specimen Adee, K.T. Hawaii BISH 1979-06-19
84 Juncus planifolius Kona-Hilo Hwy ca. 6.8 mi toward Hilo from Hongo Store. Park car by unpaved road w/chain across entrance (Abandoned Farm Road) located at left of Kona-Hilo Hwy. Walk up unpaved road ca. 100 m. Plant was about 20 m. NE (right side) of road. (plot 54) Metrosideros-Cibotium forest community. Preserved_Specimen Newell, C.L. 1024 Hawaii BISH 1967-06-26
85 Juncus planifolius Forest Reserve above Kamuela Preserved_Specimen Herbst, D.R. 228 Hawaii BISH 1966-08-09
86 Juncus planifolius Kalaupapa; Puu Alii 2, near cabin Preserved_Specimen perennial herb Wysong, M.L. 713 Molokai BISH 2005-03-24
87 Juncus planifolius Wai'ale'ale, incredibly wet area at summit rim wet area at summit rim, abundant in summit bog Preserved_Specimen Faccenda, K. 3543 Kauai BISH 2024-06-18
88 Juncus planifolius Mauna Loa, above Kulani, upper plant limits In scrub. Preserved_Specimen Christ, J.H. 18 Hawaii BISH 1957-04-24
89 Juncus planifolius Head of Alakahi Gorge, Kohala Mts Common in eroded boggy slope where clay is exposed. Preserved_Specimen Fosberg, F.R. 41716 Hawaii BISH 1961-05-23