Pacific Island Ecosystems at Risk (PIER)

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Cyanotis cristata
D. Don, Commelinaceae
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Present on Pacific Islands?  yes

Primarily a threat at high elevations?  no

Risk assessment results:  Evaluate, score: 5 (Go to the risk assessment).

Common name(s): [more details]

Chinese: si kong cao

Habit:  herb

Description:  "Stems tufted, lower part creeping, to about 50 cm tall; leaves rather broadly ovate, acute, sessile and somewhat clasping the stem at base, up to about 6 cm long and 2 cm wide, the sheaths and blades marginally pubescent; inflorescence short, borne from a series of crescent-shaped closely overlapping bracts with ciliate margins; flowers blue; stamens 6, all functional, the filaments pubescent; ovary 3-celled, cells usually 2-seeded"  (Stone, 1970; pp. 104-105).

"Herbs annual; roots fibrous. Stems creeping, often branched, 10-35 cm. Leaves all cauline; leaf blade oblong, lanceolate, ovate-lanceolate, or narrowly elliptic, 2-8 x 0.8-2 cm, abaxially glabrous or sparsely arachnoid. Cincinni often solitary, terminal or also axillary if 2 together; peduncle absent or to 9 cm; bracts 1-1.5 cm. Sepals connate at base, linear-lanceolate or oblanceolate, ca. 5 mm, abaxially hirsute along midvein and at margin. Petals blue or purple, 4-5 mm. Filaments blue lanate. Capsule columnar, trigonous, ca. 2.5 mm, hirsutulous at apex. Seeds gray-brown, pitted"  (Flora of China online).

Habitat/ecology:  In China, "by streams in ravines or open humid places; near sea level to 2000 m"  (Flora of China online).

Propagation:  Seed

Native range:  Bhutan, Cambodia, China, India, Indonesia, Laos, Malaysia, Myanmar, Philippines, Sikkim, Sri Lanka, Thailand, Vietnam  (Flora of China online).

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 possibly introduced
Stone, Benjamin C. (1970) (pp. 104-105)
Guam
Guam Island
Guam Island introduced
Fosberg, F. R./Sachet, Marie-Hélène/Oliver, Royce (1987) (p. 98)
Philippines
Philippine Islands
Philippine Islands native
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Philippines
Philippine Islands
Philippine Islands   Merrill, Elmer D. (1925) (p. 198)
In old clearings, open places along streams, about cliffs, etc., 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
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
China
China
China (People's Republic of) native
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
By streams in ravines or open humid places; near sea level to 2000 m. W. Guangdong (Xinxing Xian), Guangxi, S.W. Guizhou, Hainan, Yunnan.
Indonesia
Indonesia
Indonesia (Republic of) native
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Malaysia
Malaysia
Malaysia (country of) native
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Singapore
Singapore
Singapore (Republic of) uncertain if introduced
invasive
Chong, Kwek Yan/Tan, Hugh T. W./Corlett, Richard T. (2009) (p. 30)
Weed of uncertain origin
Thailand
Thailand
Thailand (Kingdom of) native
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)
Vietnam
Vietnam
Vietnam (Socialist Republic of) native
Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)


Need more info? Have questions? Comments? Information to contribute? Contact PIER! (pier@hear.org)

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This page was created on 8 MAR 2010 and was last updated on 22 APR 2010.