1.
Phyllachne colensoi
2. Stylidium inflorescence
3. Stylidium armeria
4. Forstera bellidifolia |
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Stylidiaceae is the trigger plant family, and is characterised by
an asymmetrical fused corolla and the presence of two stamens fused
to the style to form a column. Stylidium is the trigger plant,
in which the column, upon irritation, moves across to trap insects
as part of a pollination strategy. Species range from rosette herbs
to one alpine cushion plants (Phyllachne colensoi). Most species
have distinctly asymmetrical flowers, but those of Forstera bellidifolia
are nearly symmetrical. One native species, Levenhookia dubia, is now considered
to be extinct and is not included in this key.
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