Hibiscus trionum (weed)
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Hibiscus trionum (weed) L. - (Venice mallow or bladder ketmia)
The original distribution of this weed extends from the eastern Mediterranean region to southern Asia, and to Australia, as well as to many parts of Africa. However, it has been planted as an ornamental in other regions and is now widely distributed around the world. It can be a troublesome weed in field crops like soybean, cotton or sugar beet, forming dense stands and substantially suppress the yield of the affected crops, e.g. see Odero et al. (2009).
Hibiscus trionum is an annual herb that germinates throughout the year after rainfall and grows to a height of around 50 cm. The first leaves are entire, but older leaves are deeply lobed. The stems are hairy and the large, white flowers open for only a few hours during the day. It produces bladder-like seed capsule, that split open when they are ripe, releasing the ~2 mm wide seeds.
| Vernacular names | |
|---|---|
| • Deutsch: | Stundenblume |
| • English: | Venice mallow bladder ketmia |
| • Français: | hibiscus d'Afrique ketmie d'Afrique |
The year-long germination and the prolific seed production can make it difficult to manage this weed.
Synonyms:
Ketmia trionum
- Other images of Hibiscus trionum (weed) (Wikimedia Commons and IPM Images - click to enlarge)
seeds
