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plant


flowers


flowers

Broomrape

Orobanche minor

Other names

lesser broomrape

Description

Parasitic plant which sends up a flower spike from fleshy tubers. It does not photosynthesise so has no leaves or green bits. The flowers are usually brown or purple.

Similar plants

The only species of broomrape in NZ. Some orchids have a similar flower, but they have (green) leaves as well.

Distribution

Naturalised in both islands but rare.

Toxin

Possibly glycosides, resins and tannins.

Species affected

Grazing animals. No cases reported in NZ, and very few from overseas, probably because animals do not normally eat it. Feeding trials have shown toxic effects in goats and dogs.

Clinical signs acute

Goats reduced appetite and rumination, depression, prostration and thirst; followed by death.
Dogs diuresis.

Clinical signs chronic

Post mortem signs

Diagnosis

Differential diagnosis

Treatment

Prognosis

Prevention


References

Cooper M R, Johnson A W. Poisonous Plants and Fungi in Britan: Animals and Human Poisoning. Her Majesty’s Stationary Office. London. 1998

19 June, 2007
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