Paederia cruddasiana Prain, Rubiaceae

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Present on Pacific Islands?  no

Primarily a threat at high elevations?  no

Risk assessment results:  Evaluate, score: 2 (Go to the risk assessment).

Common name(s): [more details]

Chinese: chou ji shi teng

English: onion vine, sewervine

Habit:  vine

Description:  "Vines, to 10 m; stems moderately to sparsely hirtellous or strigillose to glabrous, drying yellowish brown. Leaves opposite; petiole 1-3 cm, hirtellous or strigillose to glabrescent; blade drying membranous, ovate, lanceolate, or narrowly lanceolate, 5-16 x 2-10.5 cm, adaxially glabrous or puberulent on principal veins, abaxially sparsely hirtellous to glabrous on blade and sparsely to moderately puberulent or hirtellous along veins, base rounded to truncate or cordate, margins flat, apex acute to weakly acuminate; secondary veins 4-8 pairs; stipules generally persistent, ovate-lanceolate to broadly triangular, 2.5-6 mm, acute or bifid. Inflorescences axillary and/or terminal, paniculate, pyramidal, 6-50 cm, branched to 3-5 orders, hirtellous to glabrescent, pedunculate; bracts triangular to linear, 0.5-2 mm; pedicels to 2 mm. Flowers subsessile to pedicellate in cymules. Calyx puberulent to glabrescent; hypanthium portion ellipsoid, ca. 1 mm; limb lobed nearly to base; lobes triangular, 0.4-2 mm. Corolla purplish blue, lilac, or pink, funnelform, outside densely puberulent to tomentulose; tube 6-16 x 1.5-4.5 mm, without slits; lobes triangular, 2-4 mm. Fruit broadly ellipsoid to ovoid, somewhat laterally compressed, 6-11 x 4.5-8 mm, glabrescent, drying yellowish gray; pyrenes ovate to elliptic, somewhat flattened, marginally winged"  (Flora of China online).

Habitat/ecology:  "open forests; 100-1900 m"  (Flora of China online).

Propagation:  Seed

Native range:  Bangladesh, Bhutan, China, India, Myanmar, Nepal, Thailand, Vietnam  (Flora of China online).

Presence:

Pacific Rim
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
China China	China (People's Republic of)	native	U.S. Dept. Agr., Agr. Res. Serv. (2013)
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)

Also reported from
Country/Terr./St. & Island group	Location	Cited status & Cited as invasive & Cited as cultivated & Cited as aboriginal introduction?	Reference & Comments
United States (continental except west coast) United States (other states)	USA (Florida)	introduced	U.S. Dept. Agr., Nat. Res. Cons. Serv. (2013)

Comments:  Planting of this species is prohibited in Miami-Dade County, Florida (U.S.) (Miami-Dade County Dept. of Planning and Zoning, 2010).

Control:  If you know of control methods for Paederia cruddasiana, please let us know.