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Isachne pallens

Hillebr. (1888)

This name is accepted

Kingdom: Viridiplantae Phylum: Magnoliophyta Class/Clade: Monocots Order: Poales Family: Poaceae Genus: Isachne

Description

Key Characters:

Growth Form: Perennials, 3–6 dm tall.

Stems: Culms lax, decumbent, geniculate below, rooting at nodes, glabrous.

Roots: Roots fibrous.

Leaves: Leaves simple. Alternate. Blades linear lanceolate, ca. 6 cm long, 2-3 mm wide. Surfaces pale green, glabrous except scaberulous at base. Margins thin, entire. Veins parallel. Sheaths short-pubescent at collar; ligule ciliate. Stipules absent.

Flowers: Panicles ovoid, 3-8 cm long, 2-3 mm wide, branches slender, filiform, pedicels longer than spikelets; spikelets ellipsoid to obovoid, ca. 2 mm long; glumes ovate, slightly longer than the florets, first glume indistinctly 5-nerved, second glume 7-nerved; first fertile floret perfect, ellipsoid, villous, the hairs crisped. Lemmas plano-convex or hemispherical, 1.3-1.6 mm long, evenly long-pilose, margins slightly clasping palea, apex obtuse; palea oblong to elliptic, slightly recurved, 1.3-1.5 mm long, glabrous except arachnoid pubescent at base, margins inrolled, apex blunt to acute.

Fruit: Caryopsis pale brown; ovoid to plano-convex or lenticular ca. 1 mm long.

Ploidy:

Habitat: Occurring in mesic forest; on rocks exposed to waterfall spray; along streams; and in wet forest.

Elevation Range: 240–760 m.

Historical Distribution

Uses and Culture

USES

Natural History

Statewide Status

Endemic

Island Status

Kaua'i Endemic
O'ahu Endemic

Dispersal Agents


Pollinators

Specimens

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Bibliography

Name Published In: Fl. Hawaiian Isl.: 504 (1888)

Other References

Wagner et al. 1990:1555 (K, O)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details On denuded ridge. Preserved_Specimen Hosaka, E.Y. 623 Oahu BISH 1932-07-04
2 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Cloud forest vegetation. Preserved_Specimen Stemmermann, R.L. 1213 Oahu BISH 1976-10-31
3 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Moist face of waterfall, foot of pali. Preserved_Specimen St.John, H. 20248 Oahu BISH 1941-06-01
4 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Along stream banks, wet forest. Preserved_Specimen Fosberg, F.R. 13748 Oahu BISH 1937-04-25
5 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Bryophyte covered trailside bank; foggy area. Preserved_Specimen Hoe, W.J. 0.114 Oahu BISH 1966-06-05
6 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Dubautia-Sadleria shrubland-fernland w/ Dubautia imbricata subsp. acronaea, D. knudsenii subsp. filliformis, D. laxa subsp. hirsuta, D. paleata, D. raillardioides, D. pauciflorula, Sadleria cyatheoides, S. pallida, S. souleyetiana, S. squ. Preserved_Specimen Litophytic grass on stream walls, clumping, occasional. Wood, K.R. 16210 Kauai BISH 2015-01-08
7 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Common on banks of trail in moist places. Preserved_Specimen Hosaka, E.Y. 2399 Oahu BISH 1938-09-27
8 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Tufts on moist mossy wall of gorge. Preserved_Specimen St.John, H. 13422 Oahu BISH 1933-12-10
9 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details On face of waterfall, under falling water and spray. Preserved_Specimen Bishop, B. Oahu BISH 1960-12-10
10 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details along stream banks. Metrosideros mixed lowland wet forest with riparian vegetation w/Antidesma platyphylla, Planchonella sandwicensis, Syzygium sandwicensis, Psychotria mariniana, P mauiensis, P. wawrae, Melicope clusiifolia, M. wawraeana, Broussaisia arguta, Cyrtandra kealiae urc Preserved_Specimen Grass, w/ flower and seed,uncommon. Wood, K.R. 18772 Kauai BISH 2021-07-13
11 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Wet mountain ridge. Preserved_Specimen Yamaguchi, M. 1234 Oahu BISH 1932-05-15
12 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Along stream. Preserved_Specimen Fosberg, F.R. 9781 Oahu BISH 1933-08-07
13 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Streambank. Preserved_Specimen Degener, O. 9147 Oahu BISH 1932-06-22
14 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Metrosideros lowland wet forest with Antidesma playphyllum var. hillebrandii, Syzygium sandicensis, Cheirodendron spp, Ilex anomala, Tetraplasandra, Dubautia knudsenii, Psychotria mariniana, P. hexadra, Psychotria wawrae, Hedyotis terminalis, Melicope spp. occasional along walls of stream with Hedyotis elatior Preserved_Specimen grass Wood, K.R. 8114 Kauai BISH 2000-01-06
15 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Growing on slope on edge of foot path going down into the gulch from Poamoho trail. Area dominateed by Dicranopteris linearis, Diplopterygium pinnatum, Metrosideros polymorpha, and others. Preserved_Specimen Thomas, M.K. 733 Oahu BISH 2024-07-11
16 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Deep valley surrounded by steep cliffs ca. 1000 m high laced with waterfalls; low primary vegetation of small, stunted trees 1-2 m tall, numerous pteridophytes, and Gunnera over saturated, rocky ground. On rock along stream. Preserved_Specimen Perennial grass, culms forming clumps. Lorence, D.H. 5345 Kauai BISH 1987-07-23
17 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details On exposed, gently sloping ground, side of trail. Preserved_Specimen Wilson, K.A. 136 Oahu BISH 1952-04-06
18 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details On dripping walls of subgulch near waterfall. Preserved_Specimen Wagner, W.L. 6295 Kauai BISH 1989-11-21
19 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Growing on waterfall. Abundant on vertical face on margins of splash zones as well on other walls away from the main torrent of water. Growing with Pilea pepploides, Miconia crenata, Macrothelypteris torresiana, Dumortiera hirsuta, Marchantia spp., and others. Preserved_Specimen Pendent grass with long, frequently rooting stems. Leaves narrowly lanceolate, broader than typical Isachne pallens but much more narrow than I. distichophylla. Thomas, M.K. 195 Oahu BISH 2021-11-29
20 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Common on mossy crest. Preserved_Specimen St.John, H. 18002 Oahu BISH 1937-05-30
21 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Exposed ridge. Preserved_Specimen Hosaka, E.Y. 1883 Oahu BISH 1937-05-30
22 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Growing along wet cliff face. Preserved_Specimen Herbst, D.R. 276 Oahu BISH 1966-09-03
23 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Wet rocks, edge of falls. Preserved_Specimen Pearsall, G.A. Oahu BISH 1955-08-04
24 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Forbes, C.N. 1055 Kauai BISH 1917-07-03
25 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details In moist, shaded ravine. Preserved_Specimen Bergman, H.F. Oahu BISH 1928-02-25
26 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details On moist rocks near base of waterfall. Preserved_Specimen St.John, H. 13964 Kauai BISH 1934-01-01
27 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Rock, J.F.C. 17326 Oahu BISH 1919-12-01
28 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Sohmer, S.H. 6067 Oahu BISH 1969-09-06
29 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Fosberg, F.R. 9528 Oahu BISH 1933-05-14
30 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Numerous clumps on riverbed mud, native mossy rainforest; common at summit and near-summit habitats in this area. Preserved_Specimen Takeuchi, W.N. 2678 Oahu BISH 1986-07-29
31 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Wet-Mesic forest. Preserved_Specimen Stemmermann, R.L. 1250 Oahu BISH 1976-11-07
32 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details In moist, shaded ravine. Preserved_Specimen Fosberg, F.R. Oahu BISH 1928-02-25
33 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Dubautia-Sadleria shrubland/fernland, high wind summit slopes w/ Psychotria mariniana, Kadua affinis, Melicope clusiifolia, M. waialealae, Vaccinium calycinum, Coprosma kauaense, Dubautia laxa, D. paleata, D. imbricata actonaea, Broussaisia arguta, Bidens forbes Preserved_Specimen grass, on stream wall, with old inflorescence, below Lysimachia venosa population, occasional Wood, K.R. 15473 Kauai BISH 2013-04-03
34 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details In moist shaded ravine. Preserved_Specimen Bergman, H.F. Oahu BISH 1928-02-25
35 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Gleichenia scrub. Preserved_Specimen Grant, M.L. 7188 Oahu BISH 1934-08-07
36 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Wet forest. Preserved_Specimen Lammers, T.G. 5507 Oahu BISH 1984-06-16
37 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Hatheway, W.H. 273 Oahu BISH 1950-06-22
38 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Fosberg, F.R. 9528 Oahu BISH 1933-05-14
39 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Hobdy, R.W. 218 Kauai BISH 1971-04-13
40 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Whitney, L.D. 4072 Oahu BISH 1936-03-01
41 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Rock, J.F.C. 17326 Oahu BISH 1919-12-01
42 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Forbes, C.N. Oahu BISH 1909-05-08
43 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Lyon, H.L. Oahu BISH 1909-07-11
44 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Pearsall, G.A. Oahu BISH 1958-06-30
45 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Williams, F.X. Oahu BISH 1939-02-13
46 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Forbes, C.N. Oahu BISH 1909-05-08
47 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Preserved_Specimen Meebold, A. Oahu BISH 1932-05-01
48 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details lowland wet forest; Metrosideros, Antidesma platyphyllum, Syzygium sandwicensis, Psychotria, Ilex anomala, Dubautia knudsenii, Dicranopteris linearis; basalt banks of stream and waterfalls Preserved_Specimen grass Wood, K.R. 7329 Kauai BISH 1998-05-27
49 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Tufted, in open woods. Preserved_Specimen St.John, H. 10088 Oahu BISH 1930-11-30
50 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Common on mossy crest. Preserved_Specimen St.John, H. 18002 Oahu BISH 1937-05-30
51 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Almost only on shaded perpendicular banks. Preserved_Specimen Degener, O. 27379 Oahu BISH 1961-04-30
52 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details With liverworts, Selaginella and Schizaea robusta. Preserved_Specimen Davis, J. 0.11766 Oahu BISH 1977-11-15
53 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details Dense wet forest with moderate to heavy Psidium growth, except upper part of valley dominated by Metrosideros with understory of Psychotria, Hedyotis terminalis, Cyanea (3 species), Dicranopteris (in open areas), 3 spp. of Cyrtandra, Labordia hirtella (in upper part). Growing on steep stream banks with mosses and ferns. Preserved_Specimen Wagner, W.L. 6009 Kauai BISH 1988-04-07
54 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details on the banks of Wahiawa Stream behind Kanaele Swamp. Preserved_Specimen Herbst, D.R. 2420 Kauai BISH 1972-05-22
55 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details On a wet cliff face in the upper valley. Preserved_Specimen Hobdy, R.W. 1801 Kauai BISH 1983-08-20
56 Isachne pallens Locality redacted. Contact Bishop Museum Botany Department for details In a shallow water, in bog. Preserved_Specimen Stone, B.C. 784 Kauai BISH 1955-06-15
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