Cratoxylum formosum (Jack) Dyer, Clusiaceae

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Present on Pacific Islands?  no

Primarily a threat at high elevations?  no

Risk assessment results:  Evaluate, score: 1 (Go to the risk assessment).

Other Latin names:  Elodes formosa Jack

Common name(s): [more details]

Chinese: yue nan huang niu mu

Habit:  shrub/tree

Description:  "Shrubs or trees, deciduous, 3-6 m tall. Trunk with spreading, long thorns on lower part. Bark exfoliating in flakes. Twigs somewhat compressed, ± tetragonous when young, becoming terete; interpetiolar scars interrupted. Petiole 5-7 mm, glabrous; leaf blade abaxially greenish, adaxially green, elliptic to oblong, 4-10 x 2-4 cm, abaxially with pellucid glands, midvein raised abaxially, impressed adaxially; secondary veins 8-10 pairs, broadly spreading, anastomosing regularly near leaf margin; tertiary veins and veinlets reticulate, base rounded, apex obtuse or acute. Cymes 5-8-flowered, in axils of fallen leaves. Pedicels 3-5 mm. Flowers ca. 1.3 cm in diameter. Sepals elliptic or oblong-lanceolate, 5-6 x 2-3 mm, apex obtuse. Petals obovate or obovate-oblong, 1.1-1.5 cm, ciliolate and brown-glandular on upper half of margin, narrowly clawed at base; petal-scale indistinct, ca. 2 mm, base cuneate, apex truncate and denticulate. Stamen fascicles ca. 1 cm, with 20-30 stamens; filament ca. as long as stalk; connectives with glands or not. Fasciclodes ligulate, 1-1.5 mm, attenuate. Ovary narrowly conic, ca. 4 mm, glabrous; styles ca. 3.5 mm. Capsule dark brown, oblong, 0.6-1.5 cm, up to 1/2 enclosed by persistent calyx. Seeds 6-8 per locule, 3-7 mm"  (Flora of China online).

Habitat/ecology:  In China (native), "thickets, open secondary forests; below 1000 m"  (Flora of China online).

Propagation:  Seed

Native range:  Cambodia, Indonesia, Laos, Malaysia, Myanmar, Philippines, 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
State of Hawaii Hawaiian Islands	O‘ahu Island		Bishop Museum (U.S.A. Hawaii. Honolulu.) (1997) (voucher ID: BISH 655127) Taxon name on voucher: Cratoxylum formosum (Jack) Dyer
Philippines Philippine Islands	Philippine Islands	native	Zhengyi, Wu/Raven, Peter H./Deyuan, Hong (2013)

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) S. Guangxi, Hainan, S. 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)
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)

Control:  If you know of control methods for Cratoxylum formosum, please let us know.