We do know that most of them are due to a class of pigments called anthocyanins.
|Pigface Carpobrotus rossii Family Aizoaceae, Lincoln NP, South Australia.|
Here the pink 'petals' are in fact sterile stamens, or staminodes.
|Gomphrena canescens Family Amaranthaceae, Litchfield NP, south-west of Darwin.|
The floor of this tropical woodland was carpeted with pink.
|Poison Morning Glory Ipomoea muelleri, Family Convolvulaceae, south-west Queensland.|
There are some 40 Australian members of this huge genus which includes sweet potatoes.
|River Rose Bauera rubioides Family Cunoniaceae (or Baueraceae), Bundanoon, New South Wales.|
A common and lovely shrub along streamlines in sandstone country.
|Coopernookia barbata Family Goodeniaceae, Bundanoon, New South Wales.|
The odd genus name comes from the small town of Coopernook in northern New South Wales.
Until 1968 it was included in the large genus Goodenia.
|Sturt's Desert Rose Gossypium sturtianum Family Malvaceae, Alice Springs, central Australia.|
This beautiful member of the cotton family is the floral emblem of the Northern Territory.
|Pale Pink Boronia Boronia floribunda Family Rutacaeae, Bundanoon, New South Wales.|
There are many richer pink boronias to choose from but I love the delicacy of this one.
See here for an account of the young Italian for whom it was named.
|Collaea sp. Family Fabaceae, Machu Picchu, Peru.|
One of a genus of somewhere between 9 and 17 pea species from across South America.
|Passiflora trifolia Family Passifloraceae, Sacsayhuaman, Peru.|
Note that by the time you read this I'll be in Patagonia (this is 'one I prepared earlier');
this means that I won't be able to respond to any comments you care to make until I get back.