Galvanised burr
Sclerolaena birchii
Leaves: Bluish-green, obovate, flat, 12-18mm long and 4-7mm wide. Leaves are densely wooly/hairy on both surfaces, as are stems, giving the plant its characteristic 'galvanised' appearance.
Flowers: Flowers are bisexual and occur singularly in the leaf axil. Flowering is almost constant, there is no fixed season.
Fruit: Fruit is 2-3mm in diameter, wooly with 4-5 spines. Spines are almost horizontal with the shortest grouped together. The longest spine is 5mm. The fruiting body provides the seed with a level of dormancy as the the burr needs to be penetrated in order for seeds to germinate.
![](https://static.catalog.farmis.lt/problems/3/33/338/33867a4a-6de1-4447-8a5b-865fef03785e.jpg)
![](https://static.catalog.farmis.lt/problems/1/1f/1f2/1f2c9a9b-658b-4229-9fc5-f619f70a3c02.jpg)
![](https://static.catalog.farmis.lt/problems/c/cc/cc5/cc5b23ea-1e15-4914-a412-fb1915707ff9.jpg)
![](https://static.catalog.farmis.lt/problems/f/f9/f91/f912c97f-89b3-4c2d-8bff-afcab7e2a1c2.jpg)
![](https://static.catalog.farmis.lt/problems/0/0c/0ca/0cae31cb-b368-4b07-97d1-0ac422dc5851.jpg)
![](https://static.catalog.farmis.lt/problems/d/d2/d2a/d2aeaf45-d67e-4b68-9710-54e97f2259ea.jpg)
![](https://static.catalog.farmis.lt/problems/d/d8/d8e/d8e62231-6ed9-47b5-86b3-af8267597aa3.jpg)
![](https://static.catalog.farmis.lt/problems/a/a0/a0f/a0f02b8d-ce8c-4381-8f6a-7e06372668c4.jpg)
![](https://static.catalog.farmis.lt/problems/f/f8/f88/f8831def-0c21-4a47-85f6-6951ae6356d4.jpg)
![](https://static.catalog.farmis.lt/problems/9/9d/9d2/9d2bcfbd-2a3e-4cd7-ac34-81797319e066.jpg)
![](https://static.catalog.farmis.lt/problems/e/e1/e13/e13b7b50-39e6-42b8-aa3c-78b1cae4664c.jpg)
![](https://static.catalog.farmis.lt/problems/7/73/73d/73d5c45b-8c44-49be-b147-c816120bc8e2.jpg)
![](https://static.catalog.farmis.lt/problems/c/cc/cc1/cc128853-b840-47ed-a1b8-2c1b5060d6a7.jpg)
Plant Protection Products
- ⭑⭑⭑
- ⭑⭑⭑
- N/A
- ⭑⭑⭑
- N/A
- N/A
- N/A
- N/A
- N/A
- N/A
- N/A
- N/A