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  4. Lupinus arboreus

Lupinus arboreus

Tairoa Peninsula, Otago.<br>Photographer: John Sawyer, 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>
Hutt River.<br>Photographer: Jeremy R. Rolfe, Date taken: 07/06/2006, 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: 21/04/2006, 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: 21/04/2006, 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>
Seedlings. Riversdale.<br>Photographer: Jeremy R. Rolfe, Date taken: 01/05/2006, 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>
Lupinus arboreus.<br>Photographer: John Barkla, Licence: <a target='_blank' href='https://creativecommons.org/licenses/by/4.0'>CC BY</a>.
Tairoa Peninsula, Otago.<br>Photographer: John Sawyer, 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>
Tairoa Peninsula, Otago.<br>Photographer: John Sawyer, 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>
Tairoa Peninsula, Otago.<br>Photographer: John Sawyer, 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>
Tairoa Peninsula, Otago.<br>Photographer: John Sawyer, 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>
Empty pods; Castlecliff Beach, Whanganui.<br>Photographer: Colin C. Ogle, Date taken: 02/04/2018, 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>
Empty pods; Castlecliff Beach, Whanganui.<br>Photographer: Colin C. Ogle, Date taken: 02/04/2018, 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>
Empty pods; Castlecliff Beach, Whanganui.<br>Photographer: Colin C. Ogle, Date taken: 02/04/2018, 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>
Seedling. Wainuiomata coast.<br>Photographer: Jeremy R. Rolfe, Date taken: 09/06/2010, 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>
Palliser Bay.<br>Photographer: Jeremy R. Rolfe, Date taken: 08/07/2010, 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>
Hutt River, Pomare, Lower Hutt.<br>Photographer: Jeremy R. Rolfe, Date taken: 18/10/2020, 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, Pomare, Lower Hutt.<br>Photographer: Jeremy R. Rolfe, Date taken: 18/10/2020, 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, Pomare, Lower Hutt.<br>Photographer: Jeremy R. Rolfe, Date taken: 18/10/2020, 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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Skull and crossbones

Poisonous plant

Common name

tree lupin

Family

Fabaceae

Authority

Lupinus arboreus Sims

Flora category

Vascular – Exotic

Structural class

Trees & Shrubs - Dicotyledons

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.

LUPARB

Habitat

Terrestrial. Short tussockland, bare land, riverbeds, coastal sandy and well drained areas.

Features

Short-lived, perennial shrub to 2-3 m high. Deep taproot. Stems densely silky-hairy when young, tough, erect, branching, becoming soft-woody. Leaves grey-green, hairless above, silky below, divided into 5-11 leaflets spreading out from one point finger-like; leaflets 15-40 x 3-10 mm. Flowers pea-like, 15-18 mm long, usually pale yellow (rarely white or bluish), sweetly scented, Oct-May. Seed pod stout, softly hairy, 40-80 mm long, firmly attached; splits explosively to disperse dark brown, mottled seeds, 4-6 mm long.

Similar taxa

L. angustifolius blue lupin is a semi-woody annual with blue flowers Aug-Apr, occasionally weedy. L. polyphyllus herbaceos weedy species with blue flowers. Hybrid L. arboreus x polyphyllus has larger and more leaflets, flower yellow with blue or purple streaks; is rarely weedy.

Flowering

October, November, December, January, February, March, April, May

Flower colours

Yellow

Year naturalised

1899

Origin

California, N. America

Etymology

arboreus: From the Latin arbor ‘tree’, meaning tree-like

Reason For Introduction
Ornamental

Life Cycle Comments
Perennial.

Reproduction
Reproduces via seed.

Seed
Seed long-lasting in soil.

Dispersal
Water and soil movement. Explosive pods. Deliberately sown for sand consolidation, erosion control.

Tolerances
Tolerates wind, salt, hot to cold, physical damage and grazing (not readily eaten), drought, low fertility (fixes nitrogen), fire. Intolerant of moderate shade and waterlogged soils.

Poisonous plant:
The seed are poisonous if they are chewed or crushed before eating.

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