Ironweed

Scientific Name: Lithospermum arvense
Scientific Author: Linnaeus, C (1753)
Taxonomy: (Magnoliophyta: Magnoliopsida: Lamiales: Boraginaceae )

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Diagnostic Images (9)

Aggregate Fruit Dorsal Detail
Aggregate Fruit Lateral
Aggregate Fruit Lateral Variation
Carpel Dorsal
Carpel Lateral
Carpel Surface Detail
Carpel Ventral

Diagnostic Notes

Pictured: Aggregate fruit (schizocarp), Carpel or individual fruit segment (mericarp)

Description:

Schizocarp appendages: Beaks, Ridges and grooves

Schizocarp Colour: Brown

Schizocarp Length: 5 - 7mm, Greater than 10mm

Schizocarp shape: Aggregate, Florate

Mericarp Colour: Variable - brown/yellow, Straw coloured, Grey

Mericarp Length: 2 - 4mm

Mericarp Sculpture: Pappilate, Striate, Tuberculate

Mericarp Shape: Wedge

Sepals linear, 4–6 mm long, becoming much longer in fruit. Corolla 6–7 mm long, white to cream, with hairy ridges running from the stamens to the throat. Mericarps c. 4 mm long, grey.

Source: Royal Botanic Gardens and Domain Trust

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More Information

Author: Clare McLellan

Created: 31/07/2012 03:22 AEST

Last Updated: 17/01/2013 15:05 AEST

Citation: Clare McLellan (2012) Ironweed (Lithospermum arvense ) Updated on 1/17/2013 3:05:26 PM Available online: PaDIL - http://www.padil.gov.au.

Image Use: Free for use under the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)