Ipomoea polymorpha

Nomenclature

Accepted name/Authority/Place of publication: 

Ipomoea polymorpha Roem. & Schultes, Syst. Veg. 4: 254. 1819.

Synonyms: 

Convolvulus defloratus Choisy

C. nolaniflorus Zipp. ex Spanoghe

C. robertianus Spreng.

Ipomoea heterophylla R. Br.

I. pumila Spanoghe

I. tashiroi Matsumura 

Description

Habit: 
Herbs annual. Stems erect to decumbent, simple or branched basally, 8–60 cm; branchlets densely pilose, ± glabrescent.
Leaves: 
Petiole 0.5–7 mm, sparsely pilose; leaf blade entire, coarsely dentate, or irregularly pinnatifid with few segments, usually 3-cleft; middle segment linear-lanceolate, 20–25 × 2–3 mm; lateral segments broadly linear, 4–8 × 1–2 mm, sparsely pilose and ciliate, base cuneate and attenuate.
Flowers: 
Flowers solitary, axillary; bracts linear, 1–2 cm, villous. Peduncles and pedicels very short or absent. Sepals with a distinct midvein, 8–10 mm, pubescent, apex long acuminate; outer sepals ovate-lanceolate, entire or with 1 or 2 teeth at margin; inner sepals lanceolate. Corolla red-purple (rarely white), tubular-funnelform, ca. 12.5 mm, glabrous. Stamens included. Ovary and style glabrous.
Fruits: 
Capsule enclosed in calyx, globose, ca. 5 mm, 2-loculed, 4-valved.
Seeds: 
Seeds ca. 3 mm, gray-brown tomentellous.
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: 

China (Hainan, Taiwan), Cambodia, ?India, Indonesia, Japan (Ryukyu Islands Islands), Laos, Malaysia, New Guinea, Philippines, Vietnam; Africa, Australia (Western Australia; Northen Territory; Queensland; New South Wales). 

Ecology: 

Grasslands,
sandy seashores; less than 100 m. 

Phenology: 

Flowers: throughout the year, mainly Jan.-May.

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.  

Johnson, R.W. [unpublished]. Convolvulaceae In eFloraSA [Electronic Flora of South Australia].  http://www.flora.sa.gov.au/factsheets.html

Other information

Common names and uses: 
yu ye shu (Chinese). Silky cow-vine (Australia)

Authorship for webpage

Editor: 
George Staples, Esmond Er
Contributors: 
Classification: 
Ipomoea polymorpha
Wed, 2011-09-21 04:27 -- Esmond
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