The Amanita Muscaria Wales Greetings Card: a photograph of the fly agaric found growing wild in Wales, and the fungus behind the fairy-tale toadstool.

Barbados Shellmoon Greetings Card: a Caribbean shell photographed against the moon whose pull creates the tide that brings it ashore, on a 15cm square card.

The Beetle with a Heart Greetings Card: a photograph of a natural marking that reads as a heart, and why beetles evolved to wear such bold warning patterns.

Brain Coral Maze Pattern Greetings Card: a close photograph of a grooved brain coral's winding, maze-like ridges, printed on a blank 15cm square card.

The Delicious Monster Greetings Card: a photograph of Monstera deliciosa's famously holed leaf, and the several competing theories for why it grows that way.

The Early One Spring Greetings Card: a photograph of the year's hinge moment, and the long-standing British habit of recording exactly when spring begins.

The Early Summer Rose Greetings Card: a photograph of the year's first flush of bloom, and why the modern repeat-flowering rose calendar runs this way.

The Eucalyptus Landscape Greetings Card: a photograph of a gum tree grove, and why these trees shed their papery bark instead of shedding their leaves.

The Golden Spiral Greetings Card: a photograph of a natural spiral, and the real difference between the golden ratio and the shapes that merely echo it.

The Japanese Maple Blues Greetings Card: a photograph of Acer palmatum in its cooler, less expected register, well ahead of its famous autumn fire show.

Jersey Seaweed Ripple Greetings Card: seaweed and rippled sand photographed on Jersey, once gathered as vraic to feed the island's fields, on a 15cm card.

The Leaf Glow Greetings Card: a photograph of daylight passing straight through a single leaf, and the fine network of veins it reveals along the way.

One Silvery Fish Vertical Greetings Card: a photograph of a fish whose mirror-bright scales are built for camouflage in open water, on a portrait format card.

The Photographic Fern Greetings Card: a photograph of a plant that predates the flower by millions of years, and the Victorian craze it once inspired.

The Rose Shadows Greetings Card: a photograph built around what a rose's shadow does rather than the bloom itself, and how petals actually handle light.

The Sisal Folded Leaves Greetings Card: a photograph of the leaf behind an entire global fibre industry, folded and creased to show the strands inside it.

Soundwave Greetings Card: an original photograph of a natural ripple pattern that reads like the trace of a sound wave, on a blank 15cm square note card.

Spiralfish Wave and Tide Greetings Card: a photograph built around the seahorse, the one fish whose tail coils into a true spiral, on a 15cm square card.

Spiralmoon Greetings Card: an original photograph pairing a natural spiral shape with the changing moon, printed on a blank 15cm square card, ready to send.

The Zimbabwe Agave Greetings Card: a photograph of an agave rosette, and the plant that spends decades preparing quietly for one single act of flowering.