Pacific Island Ecosystems at Risk (PIER)

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Themeda gigantea
Hack, Poaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Anthisiria gigantea Cav.

Common name(s): [more details]

English: ulla

Habit:  grass

Description:  "Tall, usually stout, spikes few in narrow pedicelled fascicles terminating the branches of a compound or decompound inclined or nodding rarely subsimple panicle, proper spathes rather longer than the spikes, involucr. spikelets linear-lanceolate, one of each pair deciduous, bisexual spikelets 1-3 rufously hirsute dorsally channeled."

"Stem 8-16 ft., often nearly 1 in. diameter below, erect, solid, terete, glabrous, simple below, branching above, leafy.  Leaves 4-8 ft. by 1/2 1 in., linear, setaceously acuminate, scaberulous above, glaucous beneath, margins scabridly serrulate, base narrowed, midrib road, lower bifarious; lower sheaths compressed; ligule short, membranous, ciliolate.  Panicle 1-3 ft., oblong, rarely simple, inclined, branchlets flexuous; spikes often pendulous; spathes narrowly cymbiform, keel and nerves scabrid.  Spikes as long as the proper spathes or shorter; peduncle much shorter than the spathe, filiform, erect or divaricate.  Invol. spikelets 1/3 2/3 in.; gl. I linear-lanceolate, setaceously acuminate, glabrous or hirsute with fulvous hairs, keels scabrid; II shorter, acuminate, ciliate; III and IV  sill shorter, linear-oblong or lanceolate, ciliate.  Bisexual spikelets 1/5 1/3 in., linear-lanceolate; callus 1/8 1/6 in., villous with long brown hairs; gl. I coriaceous, acute or acuminate, dorsally 1-3-channelled, more or less villously hirsute all over or below the middle with brown hairs; II acute in the awnless spikelets, obtuse in the awned; III oblong-lanceolate, 1-nerved; IV = III, linear-lanceolate in the awnless spikelets, acute, 1-nerved in the awned; IV the hyaline base of the awn"  (Hooker, 1897; pp. 216-217).

Description from GrassBase.

Habitat/ecology:  "In the Philippines, "in open grasslands on dry steep slopes at low and medium altitudes" (Merrill, 1925; p. 50).

Propagation:  Seed

Native range:  India to China, Malaya, New Caledonia and Australia (Merrill, 1925; p. 50).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
New Caledonia
New Caledonia
New Caledonia Islands   Swarbrick, John T. (1997) (p. 97)
New Caledonia
New Caledonia
New Caledonia Islands native
Merrill, Elmer D. (1925) (p. 50)
New Caledonia
New Caledonia Archipelago
Île Grande Terre   National Tropical Botanical Garden (U.S.A. Hawaii. Kalaheo.) (1983) (voucher ID: PTBG 37238)
Taxon name on voucher: Themeda gigantea
Philippines
Philippine Islands
Philippine Islands native
Merrill, Elmer D. (1925) (p. 50)
In open grasslands on dry steep slopes at low and medium altitudes.
Solomon Islands
Solomon Islands
Solomon Islands   Henty, E. E. (1969) (p. 185)
Solomon Islands
Solomon Islands
Solomon Islands native
Hancock, I. R./Henderson, C. P. (1988) (p. 114)
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Australia
Australia (continental)
Australia (continental) native
Merrill, Elmer D. (1925) (p. 50)
China
China
China (People's Republic of) native
Merrill, Elmer D. (1925) (p. 50)
Indonesia
Indonesia
Indonesia (Republic of)   Holm, Leroy/Pancho, Juan V./Herberger, James P./Plucknett, Donald L. (1979) (p. 361)


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This page was created on 1 JAN 1999 and was last updated on 30 NOV 2008.