Leaf and flower colour difference.

<p>Pairwise Euclidean distance in CIE 1976 (L*a*b*) space was calculated and an nMDS generated for a) yellow-orange flowers and b) leaves (the leaf nMDS used data from the two highest quality cameras only: the Nikon D300 and Sony NEX-5n).</p

Variation in leaf colour measured by different cameras.

<p>Leaf colour is shown in <i>a*</i>-<i>b*</i> space for five species calculated from images taken with five different digital cameras.</p

Flower colour difference between species in the field and two invasive species.

<p>Pairwise mean flower colour difference (measured as the Earth Mover’s Distance) was calculated between individual yellow-orange flowers of different species and mean colour of individuals of <i>H</i>. <i>aurantiacum</i> (light bars) and <i>H</i>. <i>praealtum</i> (dark bars). 95% confidence intervals are shown.</p