Luzula hawaiiensis

Buchenau (1879)

This name is accepted

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

wood rush

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Description

Key Characters:

Growth Form: Strongly to weakly cespitose perennial herbs.

Stems: Stems erect, inconspicuously striate, 0.8–70 dm long.

Roots: Fibrous root system.

Leaves: Leaves simple. Primarily basal, 1–2(3) per stem. Blades linear, 5–30 cm long, 1–10 mm wide. Apex mucronate. Margins densely pubescent, especially when young, often glabrate with age. Petioles absent. Stipules absent.

Flowers: Flowers (2)3–8(–10) in subglobose glomerules subtended by papery or scarious bracts, forming cymose, terminal inflorescences, sometimes with a smaller, lateral inflorescence at the next lower node in the axil of a single foliar bract 4–15 cm long, bracts subtending inflorescence 1–4, foliaceous, 2–10 cm long, shorter than, equaling, or slightly longer than inflorescence, each flower subtended by 2–3(4) acuminate bracteoles with laciniate to subentire margins. Flowers bisexual (perfect). Perianth parts pale yellowish brown to dark brown, linear, subulate, margins narrow, hyaline, outer ones 2.5–4.5 mm long, inner ones 2–3.5 mm long; stamens shorter than perianth. Stamens 6; anthers equaling or longer than filaments. Pollen grains remaining in tetrads, surrounded by a common exine. Ovary superior, sessile, 1-celled, placentation basal; ovules 3, anatropous; styles about as long as ovary.

Fruit: Capsules pale brown to reddish brown; glossy; trigonous; oblong or ovoid; shorter than perianth. Seeds red to dark brown; ellipsoid to ovoid; 1–2 mm long; surfaces rugulose; often with white micropylar caruncle and conical protuberance at apex.

Ploidy: 2n = 14*; 24* (H); 16* (O); 38*; 42* (K)

Habitat: Occurring in open or rocky sites; slopes; cliffs; and ridges; and open areas in mesic forest and shrubland; also in subalpine forest; shrubland; and grassland.

Elevation Range: 730–2,560 m.

Historical Distribution

Uses and Culture

USES

Natural History

Statewide Status

Endemic

Island Status

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

Dispersal Agents


Pollinators

Bibliography

Name Published In: Krit. Verz. Juncac.: 85 (1879)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Luzula hawaiiensis Pihea Trail Preserved_Specimen Corn, C. Kauai BISH 1990-05-05
2 Luzula hawaiiensis Preserved_Specimen Degener, O. Oahu BISH
3 Luzula hawaiiensis West Maui, Iao Valley, along back saddle of Lao Valley on border with Olowalu Valley Aspect: NE. Wet, windswept shrubland, steep; plants cattered on windward edge of saddle in understory of dwarf vegetation. Wet shrubland: Dicranopteris, Lysimachia, Smillax, Vaccinium, Machaerina, Sadleria, Nephroia, Metrosideros, Stenogyne, Lobelia, Euphorbia Preserved_Specimen Pezzillo, Z. 1033 Maui BISH 2024-11-25
4 Luzula hawaiiensis Puu Makaala Natural Area Reserve NEON MEPO5/DENU6 woodland. With Styphelia tameiameiae, Vaccinium reticulatum, Metrosideros polymorpha, Hypochaeris radicata, Pittosporum sp., Coprosma montana, Morelotia gahniiformis, & Geranium cuneatum. Preserved_Specimen Flowering. Preer, S. 52 Hawaii BISH 2021-06-23
5 Luzula hawaiiensis Waimea District, Makaha Valley. Diospyros-Acacia-Metrosideros montane mesic forest. w/ Diospyros sandwicensis, D. hillebrandii, Alphitonia ponderosa, Pisonia sandwicensis, Dodonaea viscosa, Pleomele aurea, Psychotria mariniana, Kadua affinis, Coprosma waimeae, C. foliosa, Myrsine lan Preserved_Specimen terrestrial on open slopes with Carex meyenii, C. wahuensis, Eragrostis variabilis, Dianella sandwicensis, Wilkesia gymnoxiphium Wood, K.R. 15872 Kauai BISH 2014-03-04
6 Luzula hawaiiensis East Maui, Hanawi Natural Area Reserve, Frisbee, WSW of East Camp, O, Aspect: N. Very tall plant, in open understory. High elevation mesic montane forest, mostly MetPol and CheTri, just below subalpine shrubland. Preserved_Specimen Pezzillo, Z. 573 Maui BISH 2023-11-18
7 Luzula hawaiiensis Waimea District. Kuia NAR, Kuia Valley, accessed from Nuololo Trail on N facing slope. Metrosideros-Acacia Mesic Forest W/ Melicope barbigera, Lysimachia, Isodendrion laurifolium, Neraudia kauaiensis, Pipturus, Dodonaea, Boehmeria grandis, Sideroxylon, Poa manni, Carex meyenii, Euphorbia haeleeleana, Xylosma, Streblus Preserved_Specimen Small herb w/ white hairs on leaf margin. Tangalin, N. 2080 Kauai BISH 2009-07-01
8 Luzula hawaiiensis Hana Forest Reserve - between Waianapanapa pond and Upper Camp [to the east] Preserved_Specimen Herbst, D.R. 3050 Maui BISH 1973-08-08
9 Luzula hawaiiensis East Maui, Manawainui Planeze Preserved_Specimen Common name: Hawai'i woodrush Stein, V. Maui BISH 2005-04-08
10 Luzula hawaiiensis Eat Maui, Haleakala Crater near Kaupo and Paliku Preserved_Specimen Welton, P. 2046 Maui BISH 1998-05-13
11 Luzula hawaiiensis West Maui, Lahaina District, Lihau Natural Area Reserve, SE side of planeze near Olowalu Valley locally grown on open, sunny ridgetop Metrosideros, Dodonaea, Leptecophylla, Coprosma, Myrsine, Dicranopteris, Polypodium, Sphenomeris, Trisetum, Dianella, Carex, Andropogon, Epidendron, Conyza, Senecio. Preserved_Specimen Oppenheimer, H.L. 31307 Maui BISH 2013-03-13