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Panicum beecheyi

Hook. & Arn. (1832)

This name is accepted

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

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Description

Key Characters:

Growth Form: Cespitose perennials 30–60 cm tall.

Stems: Culms unbranched, puberulent to glabrous, the nodes glabrous or puberulent.

Roots: Roots fibrous.

Leaves: Leaves simple. Alternate, cauline. Blades 10-18 cm long, 0.2-0.5 cm wide, flat or loosely inrolled. Surfaces glabrous or puberulent. Veins parallel. Sheaths puberulent or glabrous; ligule a ciliate membrane, 0.7-1.6 mm long, the membrane 0.1-0.3 mm long, the cilia 0.6-1.3 mm long. Stipules absent.

Flowers: Panicles 10-18 cm long, axis scabrous, branches spreading, scabrous; spikelets 2.4-3.4 mm long, acuminate, pilose; glumes as long as spikelet, first glume slightly shorter than second one, 5-7-nerved, acuminate, pilose with hairs to 1.2-2.5 mm long, second glume 7-9-nerved, acuminate, pilose. First floret sterile, first lemma shorter or longer than first glume, 7-nerved, glabrous, first palea t/4 as long as spikelet; second floret 1.7-1.9 mm long, 0.5-0.7 mm wide, 0.4-0.6 mm shorter than first lemma, elliptic, glossy, smooth. Anthers 1-1.3 mm long.

Fruit: Fruit a caryopsis

Ploidy:

Habitat: Uncommon in dry; rocky; open habitats.

Elevation Range: ca. 900 m.

Historical Distribution

Images

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Uses and Culture

USES

Natural History

Statewide Status

Endemic

Island Status

Ni'ihau(Incl. Lehua) Endemic
Kaua'i Endemic
O'ahu Endemic
Maui Endemic

Dispersal Agents


Pollinators

Bibliography

Name Published In: Bot. Beechey Voy.: 100 (1832)

Other References

Wagner et al. 1990:1567 (K, O, M); Faccenda 2025b:118 (Ni†, 1826)

Occurrences

SNo. Scientific Name Locality Habitat Basis of Record Description Recorded By Record Number Island Source Date
1 Panicum beecheyi Waimea Canyon, 5.4 mi. up Waimea Canyon Dr.; small ridge on W side of canyon NW exposure, in soil sockets on exposed rock. Preserved_Specimen Flynn, T.W. 1486 Kauai BISH 1986-01-28
2 Panicum beecheyi Waianae Mts., Mt. Kaala, Dupont Trail, Mokuleia Forest Reserve Dry rocky open ridge Preserved_Specimen St.John, H. 23692 Oahu BISH 1949-05-22
3 Panicum beecheyi Waianae, the ridge dividing Lualualei and Nanakuli valleys On open, grassy shoulder of the ridge crest. Preserved_Specimen Plants growing in dense stands. Lau, J. 1823 Oahu BISH 1986-11-01
4 Panicum beecheyi Waianae Kai Forest Reserve dry mesic cliff faces, mixed alien/native Bidens cervicata, Lipochaeta tenuis, Isodendrion pyrifolium, Schinus terebinthefolius, Acacia formosa Preserved_Specimen small annual grass. Pendent habit. very few individuals observed <20. Ching-Harbin, S. 2022052401 Oahu BISH 2022-05-24
5 Panicum beecheyi West Maui, Lihau Peak Open grassy ridge Preserved_Specimen Saw one densely cespitose clump growing at 3500 ft. alt. in shady forest that was larger in all respects. Hobdy, R.W. 825 Maui BISH 1980-05-17
6 Panicum beecheyi Haupu Range, Nawiliwili Preserved_Specimen Forbes, C.N. 703 Kauai BISH 1916-10-31
7 Panicum beecheyi Niihau Preserved_Specimen Lay, G.T. Niihau BISH 1826-01-01
8 Panicum beecheyi Ridge back of Makua Valley Preserved_Specimen Whitney, L.D. 4059 Oahu BISH 1935-11-17
9 Panicum beecheyi Back of Schofield Barracks Dry rocky ridge Preserved_Specimen Whitney, L.D. 4085 Oahu BISH 1936-03-23
10 Panicum beecheyi Haupu Range, near Nawiliwili Bay Preserved_Specimen Forbes, C.N. 703 Kauai BISH 1916-10-31
11 Panicum beecheyi West Maui, Lahaina District, Kauaula Valley, south slope On rocks on steep slope. Vegetation: Metrosideros, Sophora, Nestegis, Coprosma, Dodonaea, Pipturus, Achyranthes, Diospyros, Myrsine, Melicope, Pleomele, Remya, Dryopteris, Senna, Ipomoea, Wikstroemia, Osteomeles, Trisetum, Mircrolepia, Lysimachia, Eragrostis, Alyxia, Liposhaeta, Bidens, Peperomia, Ageratina, Lantana, Grevillea, Conyza, Petroselinum Preserved_Specimen Clumping grass among, sub-erect Oppenheimer, H.L. 41335 Maui BISH 2013-04-24
12 Panicum beecheyi Waimea District. Makaha Valley. ca. 30 plants with Neraudia kauaiensis, Peucedanum sandwicensis, Dubautia microcephala, Lepidium serra, Poa mannil, uncommon Diospyros-Acacia-Metrosideros montane mesic forest, with Diospyros sandwicensis, D. hillebrandii, Alphitonia ponderosa, Pisonia sandwicensis, Dodonaea fviscosa, Pleomele aurea, Psychotria mariniana, Kadua affinis, Coprosma waimeae, C. foliosa, Myrsine lan Preserved_Specimen grass, on vertical walls of side gulch, in flower Wood, K.R. 15914 Kauai BISH 2014-04-03
13 Panicum beecheyi Back of Schofield Barracks Dry rocky ridge. Preserved_Specimen Whitney, L.D. 4085 Oahu BISH 1936-03-23
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