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Spear Thistle

Scientific Name
Cirsium vulgare
Scientific Author
Shaw, H.K. (1938)
Taxonomy
(Magnoliophyta: Magnoliopsida: Asterales: Asteraceae)
Reliability
High
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Diagnostic Images

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Caption
Australian $2 Coin with seeds
Source
Clare McLellan Museum Victoria
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Diagnostic Images (7)
Other Images (1)
Diagnostic Notes
Pictured: Achene(s)

Disseminule: Fruit (referred to as achene or seed unit)

Description

Achene appendages: Pappus deciduous

Achene Colour: Straw coloured, Striped, Variable - brown/yellow

Achene Length: 2 - 4mm

Achene Sculpture: Smooth

Achene Shape: Narrowly oblong

The seeds are about 3.5 mm long and 1.5 mm wide, grey to light brown or almost black, with faint longitudinal markings, and bear a pappus of soft feathery hairs 2-2.5 cm long at the top. This pappus is less easily dislodged from the seed when the seeds are ripe compared with some other species of thistle, but for many seeds the pappus is still lost before the seed is shed from the head Source: See Web Links Weed in Australia
More Information
Author
Clare McLellan
Created
08/11/2011 02:59 AEST
Last Updated
17/01/2013 12:05 AEST
Citation
Clare McLellan (2011) Spear Thistle (Cirsium vulgare) Updated on 1/17/2013 12:05:08 PM Available online: PaDIL - http://www.padil.gov.au.
Image Use
Free for use under the Creative Commons Attribution 3.0 Australia License

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