Evolvulus nummularius

Nomenclature

Accepted name/Authority/Place of publication: 

Evolvulus nummularius (L.) L., Sp. Pl. ed. 2. 391. 1762.

Synonyms: 

Convolvulus nummularius L., Sp. Pl. 1: 157. 1753

Evolvulus yunnanensis S. H. Huang

Description

Habit: 
Herbs perennial. Stems several, rooting at nodes, prostrate, 20–40 cm, slender, ± villous or scabrous.
Leaves: 
Leaves distichous; petiole 2–4 mm; leaf blade nearly circular, 1.3–1.7 × 1.2–1.4 cm, glabrous or appressed pilose abaxially, base cordate to rounded, apex rounded or emarginate; lateral veins 2 or 3 pairs.
Inflorescences: 
Peduncle absent or very short. Pedicel 2.5–3 mm, densely villous.
Flowers: 
Flower(s) 1 or 2 per leaf axil. Sepals persistent, oblong-ovate to oblong, 3–4 × 2–3 mm, outer 2 sepals slightly longer than inner sepals, pilose abaxially, margin ciliate. Corolla broadly campanulate or nearly rotate, ca. 6 mm; limb ca. 7–8 mm in diam., 5-lobed. Stamens inserted at middle of corolla tube; filaments ca. 1.5 mm, glabrous basally; anthers oblong. Ovary globose; style lobes linear, ca. 3 mm; stigmas minutely capitate.
Fruits: 
Capsule ovoid, 2–3 mm in diam. Seeds 2–4, brown, ovoid-trigonous, ca. 1 × 0.5 mm, minutely tuberculate.
Author: 
Fang R.C. & G. Staples
References: 

Fang R.C., G. Staples, et al. 1995. Convolvulaceae in P. Raven & C.Y. Wu (eds.) Flora of China 16: 271–325.  

Cytology

Chromosome number: 
24
Author: 
Fang R.C. & G. Staples
References: 

Fang R.C., G. Staples, et al. 1995. Convolvulaceae in P. Raven & C.Y. Wu (eds.) Flora of China 16: 271–325.  

Biogeography, Ecology and Natural History

Distribution Map: 
Distribution: 

Naturalized in China (Yunnan), India and Malaysia; naturalized in Africa; native in North & South America.

Ecology: 

China: Roadsides;
ca. 1000 m. 

Thailand: Usually
in sunny places in disturbed habitats along roads or trails, in vacant lots, parking
areas, on sandy, lateritic, or limestone soils in degraded scrub-bamboo forest,
dipterocarp-oak forest, secondary scrub forest, deciduous hardwood forest;
altitude: 350–700 m.

Phenology: 

Flowering: June, July, September; fruiting: September.

Author: 
Fang R.C. & G. Staples
References: 

Fang R.C., G. Staples, et al. 1995. Convolvulaceae in P. Raven & C.Y. Wu (eds.) Flora of China 16: 271–325.  

Other information

Common names and uses: 
duan geng tu ding gui (Chinese). Bai tang rian (Thai).

Authorship for webpage

Editor: 
George Staples, Esmond Er
Contributors: 
Classification: 
Thu, 2011-09-15 02:12 -- Esmond
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