Weed Identification

Australia > > Coastal Morning Glory

Coastal Morning Glory

Ipomoea cairica

Alternative Name(s): Mile-A-Minute

Family: Convolvulaceae.

Form: Vine

Origin: Probably native of tropical areas of Africa and Asia although its native range now obscure.

Flowers/Seedhead: Surrounded by sepals 0.40.8 cm long, stamens and style included in flower tube. Flowers most of year.

Description: Perennial herb with twining and trailing stems. Roots tuberous and plant rooting at nodes. Plants hairless. Leaves round in outline, 310 cm long and wide, leaf stalk 26 cm long. Inflorescence axillary, 13 flowered. Capsule almost globe-shaped, 912 mm wide, with 2 chambers, splitting into 4 valves, contains up to 4 seeds. Seeds dark brown to black, 56 mm long, flattened ovoid, hairy with pale brown long hairs on outer ridges.

Distinguishing features: Distinguished by deeply 5-segmented leaves with basal segments often lobed; funnel-shaped violet (rarely white) joined petals 3.56 cm long, 68 cm wide, with darker violet hairless mid-petal bands, throat usually darker.

Dispersal: Spread by seed and locally by spreading stems.


Flowers & leaves Laurieton, NSW, December

Notes: Garden escape. Localised major weed of the coastal regions of NSW and Queensland, especially along creeks. Ipomoea cairica is also naturalised in North and South America, New Zealand, Pacific islands, Taiwan and Japan.

References:

    Flora of NSW. G. Harden (ed), Vol. 3, 1992, page 380. Bush Invaders of South East Australia. A. Muyt, 2001, pages 141142.

Web References: Search Australian web sites for further information on this weed.


Seeds & part of capsule

Flowers with darker throat
& 5-segmented leaves

Climbing on tree
Laurieton, NSW
December

This weed has been included in the WEEDeck field guide as card V27

More information about WEEDeck is available from Sainty & Associates Pty. Ltd.

 

Australia > > Coastal Morning Glory

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