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Italian thistle

Scientific Name
Carduus tenuiflorus
Scientific Author
Curtis, W. (1789)
Taxonomy
(Magnoliophyta: Magnoliopsida: Asterales: Asteraceae )
Reliability
High
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Diagnostic Images

Achene Dorsal
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Caption
Seed Project
Source
Clare McLellan Museum Victoria
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Diagnostic Images (8)
Other Images (2)
Diagnostic Notes
Pictured: Achene

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

Description

Achene appendages: Ridges and grooves

Achene Colour: Variable - brown/yellow, Straw coloured

Achene Length: 4 - 7mm

Achene Sculpture: Roughened

Achene Shape: Clavate ( Club shaped)

The achenes are of two sorts, the outer being grey and the inner (the majority) being grey-brown and finely striate (longitudinally grooved). The seeds are 3-4 mm long, egg-shaped and somewhat flattened, with a terminal but easily detached tuft of unbranched white hairs (pappus) to about 15 mm long.

Source: See Web Links Weeds in Australia

More Information
Author
Clare McLellan
Created
15/05/2012 03:54 AEST
Last Updated
17/01/2013 12:36 AEST
Citation
Clare McLellan (2012) Italian thistle (Carduus tenuiflorus ) Updated on 1/17/2013 12:36:58 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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