File:Marrubium vulgare flowerhead12 QNR (15715443619).jpg

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Summary

Description Introduced, yearlong green, perennial, aromatic herb to 60 cm tall and covered in dense white hairs. Stems are erect, square in cross-section & much branched near the base. Leaves are oppositely arranged and crinkled. White zygomorphic flowers occur in clusters of 6-12 in the leaf axils; they form dry brown burrs with hooked spines. Germinates whenever there is sufficient rain; flowers throughout the year. A weed in a wide range of habitats where competition has been reduced by disturbance, overgrazing or previous grazing by sheep. Rarely invades undisturbed native vegetation and does not establish in cultivated paddocks. Prefers alkaline soils with low ground cover and rainfall of more than 200 mm. Seed spread by burrs attaching to animals and equipment, by water or in dung. Invasive, producing large numbers of long-lived seeds; causes vegetable fault in wool. Bitter tasting; unpalatable to stock; taints meat. Control options include hand-pulling, biological control agents, herbicides, burning, slashing, cultivation and sowing of competitive species.
Date
Source Marrubium vulgare flowerhead12 QNR
Author Harry Rose from South West Rocks, Australia

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This image was originally posted to Flickr by Macleay Grass Man at https://www.flickr.com/photos/73840284@N04/15715443619. It was reviewed on 26 May 2015 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

26 May 2015

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8 November 2014

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Date/TimeThumbnailDimensionsUserComment
current11:39, 29 December 2019Thumbnail for version as of 11:39, 29 December 20192,145 × 2,543 (2.1 MB)SalicynaCropped 46 % horizontally, 15 % vertically using CropTool with precise mode.
15:05, 26 May 2015Thumbnail for version as of 15:05, 26 May 20154,000 × 3,000 (4.96 MB)Amada44Transferred from Flickr via Flickr2Commons
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