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  4. Helminthotheca echioides

Helminthotheca echioides

Helminthotheca echioides.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Helminthotheca echioides.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Helminthotheca echioides.<br>Photographer: Peter J. de Lange, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Helminthotheca echioides.<br>Photographer: Peter J. de Lange, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Hutt River.<br>Photographer: Jeremy R. Rolfe, Date taken: 30/04/2006, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Hutt River.<br>Photographer: Jeremy R. Rolfe, Date taken: 30/04/2006, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Newtown, Wellington. Apr 2009.<br>Photographer: Colin C. Ogle, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Capitulum in fruit. Newtown, Wellington. Apr 2009.<br>Photographer: Colin C. Ogle, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Inner achene. Hutt River.<br>Photographer: Jeremy R. Rolfe, Date taken: 06/02/2007, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Inner achene. Hutt River.<br>Photographer: Jeremy R. Rolfe, Date taken: 06/02/2007, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Outer achene detail.<br>Photographer: Jeremy R. Rolfe, Date taken: 09/02/2007, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Outer achenes. Hutt Valley.<br>Photographer: Jeremy R. Rolfe, Date taken: 09/02/2007, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Seed dimorphism - showing Inner (left) and outer achenes.<br>Photographer: Jeremy R. Rolfe, Date taken: 10/02/2007, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Helminthotheca echioides.<br>Photographer: Peter J. de Lange, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Adaxial surface of leaf. Wellington. Jun 2009.<br>Photographer: Colin C. Ogle, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Adaxial surface of leaf. Wellington. Jun 2009.<br>Photographer: Colin C. Ogle, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Eastbourne.<br>Photographer: Jeremy R. Rolfe, Date taken: 04/12/2009, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
Stokes Valley, Lower Hutt.<br>Photographer: Jeremy R. Rolfe, Date taken: 04/01/2017, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>. <a class='member-message' href='/nzpcn/why-join-nzpcn/' target='_blank'>Members can view a larger version of this image.</a>
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Common name

Oxtongue

Family

Asteraceae

Authority

Helminthotheca echioides (L.) Holub

Flora category

Vascular – Exotic

Structural class

Herbs - Dicotyledonous composites

NVS code

The National Vegetation Survey (NVS) Databank is a physical archive and electronic databank containing records of over 94,000 vegetation survey plots - including data from over 19,000 permanent plots. NVS maintains a standard set of species code abbreviations that correspond to standard scientific plant names from the Ngä Tipu o Aotearoa - New Zealand Plants database.

HELECH

Habitat

A common weed of waste land, pasture, urban areas, and forest margins. Coastal to montane.

Similar taxa

The stem and leaf indumentum of oxtongue (Helminthotheca echioides (L.) Holub) has 2-, 3-, 4- or 5-hooked anchor hairs and the hairs of the leaves arise from a conspicuous swollen base. The involucral bracts of the flowers are in two rows, with the five outer involucral bracts ovate to cordate, and the apex of the inner bracts feather-like. Unlike our indigenous oxtongus (Picris spp. ) the achenes of the introduced oxtongue (H. echioides) are dimorphic: the outer achenes, are larger, white, and pilose hairy; the inner shorter, dark-brown and glabrous. In our indigenous oxtongues (Picris spp.) the achenes are never heteromorphic.

Flowering

Year round in warm climates - otherwise August - May

Flower colours

Red/Pink, Yellow

Fruiting

Present year round in warm climates otherwise October - July

Year naturalised

1869

Origin

S. Europe, S.W Asia, N. Africa - long known in New Zealand as Picris echioides L.

Reason For Introduction
Probably accidental

Life Cycle Comments
Biennial to short-lived perennial. Sometimes annual in harsh conditions.

Reproduction
Exclusively by seed

Seed
Dimorphic. Outer achenes are white and larger than the brown inner achenes. Seed is probably long-lived as this species turns up in agricultural grassland soil that has been recently ploughed

Dispersal
Wind dispersed. The seeds also attach to clothing, wool and other fibres

Tolerances
Moderately drought and cold tolerant.

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