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  4. Arrhenatherum elatius subsp. elatius

Arrhenatherum elatius subsp. elatius

Whanganui. Dec 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>
Lake Te Anau shoreline.<br>Photographer: John Barkla, 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>
Colville bay, December.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Colville bay, December.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Colville bay, December.<br>Photographer: John Smith-Dodsworth, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by-nc/4.0'>CC BY-NC</a>.
Inflorescence. Whangaimoana Stream, south Wairarapa.<br>Photographer: Jeremy R. Rolfe, Date taken: 03/04/2010, 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>
Whangaimoana Stream, south Wairarapa.<br>Photographer: Jeremy R. Rolfe, Date taken: 03/04/2010, 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>
Whangaimoana Stream, south Wairarapa.<br>Photographer: Jeremy R. Rolfe, Date taken: 03/04/2010, 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>
Node and ligule. Whangaimoana Stream, south Wairarapa.<br>Photographer: Jeremy R. Rolfe, Date taken: 03/04/2010, 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

tall oat grass

Family

Poaceae

Authority

Arrhenatherum elatius subsp. elatius (L.) J.Presl et C.Presl.

Flora category

Vascular – Exotic

Structural class

Grasses

Habitat

Terrestrial.

Features

Tallish, erect, tufted, perennial grass. Roots fibrous, yellow to orange. Stems rounded, emerging leaves rolled; sheaths smooth with yellow to orange base. Leaves long and narrow, 100-400 x 4-10 mm, flat, harsh, dull bluish-green, with yellowish lines when held to light, usually with scattered hairs above, bitter taste; ligule 1-3 mm long, membranous, white, serrate along edge. Seedhead a narrow panicle. Seeds large, oat-like, with papery covering and a spiky appearance (awned) (Weed Manager).

Year naturalised

1871

Origin

Eurasia, Nth Africa

Reason For Introduction
Agricultural

Life Cycle Comments
Perennial.

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