Pacific Island Ecosystems at Risk (PIER)

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Vernonia patula
(Aiton) Merr., Asteraceae
No images for this taxon


Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Other Latin names:  Centratherum chinense Less.; Conyza patula Aiton; Cyanthillium patulum (Aiton) H. Rob.; Vernonia chinensis (Less.) Less.

Common name(s): [more details]

Chinese: xian xia hua

Habit:  herb

Description:  "Herbs, annual, 30-90 cm tall. Root vertical, with many fibrous rootlets. Stems erect, many branched, branches spreading, terete, conspicuously striate, gray puberulent and glandular. Lower leaves withered by anthesis; middle and upper leaves: petiole 1-2 cm, upper part winged; leaf blade ovate, ovate-elliptic, rarely orbicular, 2-9 x 1-5 cm, abaxially densely adpressed gray pubescent and glandular, adaxially green, sparsely puberulent or glabrous, lateral veins 4- or 5-paired, ascending, base broadly cuneate into petiole, margin crenate-mucronate toothed, repand, or subentire, apex obtuse or rather acute; upper leaves gradually smaller. Synflorescences terminal, panicles broad, often flat-topped. Capitula usually 2 or 3 clustered at tips of branches, 8-10 mm in diameter; peduncle 5-25 mm, densely sericeous-villous; bracteoles absent. Involucre compressed spheroidal, 6-7 x 8-10 mm, base rounded, ± concave; phyllaries 4- or 5-seriate, green or rather purple, with straw-colored margins, lanceolate, 3-4 mm, subleathery, sericeous-villous and glandular, apex subspinelike-acuminate, outermost spreading, median and inner narrowly oblong-lanceolate, ca. 6 mm, spiculate. Receptacle slightly convex, foveolate. Florets 75-100; corolla reddish purple, tubular, 4-5 mm; lobes linear-lanceolate, puberulent and glandular, apex acute. Achenes subcylindric, 1-1.5 mm, 4- or 5-angled, glabrous, glandular. Pappus 1-seriate, white; setae 2-3 mm, scabrid, easily deciduous"  (Flora of China online).

"Erect branching herbs; stems ribbed; leaves mostly ovate-elliptic, cuneate at base, acute or obtuse, apiculate, subentire or obscurely toothed, villous dorsally, up to 10-12 cm long and 4-5 cm wide, on petioles up to 2.5 cm long; heads many, paniculate-corymbose, 40-100-flowered; bracts of involucre lanceolate, puberulent, 4-5-seriate, 6-7 mm long; corollas slightly exserted, violet or rarely paler to white, 4-5 mm long; anthers and style-branches violet; achenes obovoid-oblong, mostly 5-angled, glabrous, glandular, 1-1.5 mm long; pappus hairs 2-3 mm long, 1-seriate, caducous, white" (Stone, 1970; p. 595).

Description from the Digital Flora of Taiwan.

Habitat/ecology:  In China (native), "open places on slopes, fields, and roadsides" (Flora of China online).

Propagation:  Seed

Native range:  Tropical Asia (Stone, 1970; p. 595).

Presence:

Pacific
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Guam
Guam Island
Guam Island introduced
invasive
Stone, Benjamin C. (1970) (pp. 594-595)
Guam
Guam Island
Guam Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1979) (p. 292)
Papua New Guinea
Bismarck Archipelago
Bismarck Archipelago invasive
Peekel, P. G. [translated by E. E. Henty] (1984) (p. 555)
A weed of plantations and rubbish heaps.
Papua New Guinea
Papua New Guinea (eastern New Guinea Island)
Papua New Guinea (eastern New Guinea Island) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Philippines
Philippine Islands
Philippine Islands native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Philippines
Philippine Islands
Philippine Islands native
invasive
Merrill, Elmer D. (1923) (p. 594)
A common weed in the settled areas at low and medium altitudes.
Pacific Rim
Country/Terr./St. &
Island group
Location Cited status &
Cited as invasive &
Cited as cultivated &
Cited as aboriginal introduction?
Reference &
Comments
Cambodia
Cambodia
Cambodia (Kingdom of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
China
China
China (People's Republic of) native
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Fujian, Guangdong, Guangxi, Guizhou, Taiwan, Yunnan
China
China
Hong Kong native
Wu, Te-lin (2001) (p. 289)
In wasteland.
Indonesia
Indonesia
Indonesia (Republic of) native
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Japan
Japan
Japan (country) introduced
Mito, Toshikazu/Uesugi, Tetsuro (2004) (p. 190)
Malaysia
Malaysia
Malaysia (country of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Singapore
Singapore
Singapore (Republic of) uncertain if introduced
invasive
Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 89)
Weed of uncertain origin
Taiwan
Taiwan Island
Taiwan Island native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Taiwan
Taiwan Island
Taiwan Island native
Ching-I Peng, ed. (2013)
"An uncommon weed in the south".
Thailand
Thailand
Thailand (Kingdom of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)
Vietnam
Vietnam
Vietnam (Socialist Republic of) native
U.S. Dept. Agr., Agr. Res. Serv. (2013)


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This page was created on 16 JAN 2007 and was last updated on 16 MAR 2012.