Kōrero: Evolution of plants and animals

Veronica arvensis and hebe

Veronica arvensis and hebe

Hebes (right) are in the Veronica (formerly Hebe) genus of over 120 shrubs and small trees, common throughout New Zealand. It is New Zealand’s largest flowering plant genus. All hebe species are thought to have evolved from a low-growing northern hemisphere ancestor similar to the common speedwell, Veronica arvensis (left). This is probably related to the lack of lowland open habitats in a land dominated by forest. Newly arrived herbaceous plants such as the hebe’s ancestor would have come under evolutionary pressure to develop into woody, taller growing plants in order to compete.

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Photographs by Phil Garnock-Jones (left); Melanie Lovell-Smith (right)

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Me pēnei te tohu i te whārangi:

Matt McGlone, 'Evolution of plants and animals - Plants in a mild climate', Te Ara - the Encyclopedia of New Zealand, http://www.TeAra.govt.nz/mi/photograph/12444/veronica-arvensis-and-hebe (accessed 16 September 2019)

Story by Matt McGlone, published 24 Sep 2007