Shallow lobes
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94. Red convolvulus Ipomoea hederifolia |
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An annual twiner with pale to mid-green leaves which are oval to heart-shaped, 3 lobed and 5 to 10 cm long. Flowers are bright red, trumpet-shaped, with a tube about 3 cm long which is flared at the end into 5 lobes about 1.5 cm across. Usually a few flowers are grouped at the end of a stalk in the leaf joint. Seed capsules are globular with 4 dark brown seeds. Red Convolvulus is widespread and common. Heavy infestations can cause both lodging of the cane crop and difficulties during harvesting.
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95. Blue morning glory Ipomoea indica |
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A vigorous twining plant. Leaves are alternate, dull green above and paler beneath. They are heart shaped, sometimes with three lobes and about 10 cm long and broad. Flowers are grouped on stalks in the leaf joints. They are trumpet-shaped, bright blue with a white, occasionally pink, tube. Seed capsules are globular, papery, 1 cm across and contain up to 6 dark brown to black seeds. Blue Morning Glory is less common than Common Morning Glory but is a troublesome weed of cane fields in some districts. This specimen was found in an infestation in the Burdekin district. |
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96. Common morning glory Ipomoea purpurea |
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A vigorous, annual twiner. Leaves are alternate with short hairs on both surfaces and are dark green above and paler green beneath. They are stalked and heart-shaped, sometimes three lobed, 4 to 15 cm long and 2.5 to 12 cm wide. Flowers are about 5 cm long and are carried in small, stalked groups or singly in the leaf joints. They are purple with reddish streaks and are paler purple to white outside and inside the tubes. Seed capsules are globular, papery, about 1 cm across with up to 6 angular, brown seeds. Common Morning Glory is widespread and but common only in some localities. It can pull down the crop and cause problems during harvesting. |
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97. Pink convolvulus Ipomoea triloba |
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A vigorous, annual twiner. Leaves are alternate, stalked, 3 lobed and sometimes almost heart-shaped. They are 2 to 5 cm long and wide. Flowers are small, pink, funnel-shaped and about 2 cm long. They are found in groups at the ends of stalks in the leaf joints. Seed capsules are globular, about 5 mm across, papery and hairy, with four brown seeds. Pink Convolvulus is widespread and common in some areas particularly in the north. It can pull down the crop and cause problems during harvesting. |
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98. Stinking passion flower Passiflora foetida |
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A thin-stemmed, softly hairy vine. Leaves are alternate and velvety on both surfaces. They are dull yellow-green above, paler beneath and up to 10 cm long and 7 cm wide. The leaves are shallowly three-lobed with the central lobe being the longest. Tendrils are present in the leaf forks. The flowers are white, of typical passion fruit flower formation, up to 4 cm across and have 3 bracts finely divided into glandular, hair-like lobes. They are carried singly in the leaf forks. The fruit is about 2 cm across, dull orange when ripe, with a thin, hard shell and very sweet pulp. Stinking Passion Flower is common in all districts. It grows vigorously, smothering cane if not controlled. |
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99. Chinese burr Triumfetta rhomboidea |
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A perennial, branching shrub growing to 1.3 m with brown stems and tough bark. Leaves have short hairs, are alternate, rounded at the base and usually have 3 prominent, pointed lobes. The edges are toothed and the size variable but mostly about 5 to 7.5 cm across. Flowers are small, yellow and borne in clusters along the upper branches. The fruit is a prickly burr approximately 6 mm in diameter which does not break up when ripe. Chinese Burr is widespread and often found in association with neglected grazing paddocks. It grows in sheltered places along fence lines, on banks and occasionally invades cane fields. |
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100. Urena burr Urena lobata |
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A tall annual or short-lived perennial growing to 3.5 m but usually much less. The stem is woody with slender branches and has tough bark. Leaves and stems are covered with short hairs. Leaves are alternate, about 5 to 7 cm across and the edges are divided into several, shallow, triangular lobes. They are pale green on top and grey-green below. Flowers are pink and carried on short stalks in the leaf joints. The fruit is a small burr which breaks up into 4 or 5 pieces. Urena Burr is widespread and common, particularly in the north-ern districts. It may be abundant on land newly cleared of scrub and is often associated with sheltered areas on the edges of neglected grazing paddocks. It occasionally invades cane, usually in poor growth areas. |
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101. Noogoora burr Xanthium pungens |
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A robust annual plant with few branches, rough to touch and growing to 2 m. The leaves are alternate, 10 to 15 cm across with irregularly toothed and lobed edges. Male flowers are in clusters on slender stalks at the end of branches. Female flowers are clustered on branchlets in the leaf joints. Fruits are hard, woody, spiny burrs containing two seeds. Noogoora Burr is widespread and very common, particularly on grazing land along creek banks. Adjacent cane fields can be-come severely infested if measures are not taken to control the weed. Infestation can occur following flooding which disperses the seed-containing burrs. The burrs attach themselves readily to clothing and to hair and fur of animals. |
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