Phil Savoie / Bitteroot (Lewisia rediviva) Beaverhead National Forest, Montana, USA, June.

Ernie Janes / Siskiyou lewisia (Lewisia cotyledon) flowers, cultivate plant native to New Zealand.

Guy Edwardes / Roseroot (Sedum rosea) Mangrt Pass, Julian Alps, Slovenia. June 2008

Kevin Schafer / Oregon Bitter-root (Lewisia rediviva) flowers, Cascade Mountains, Washington

Olga Kamenskaya / Roseroot stonecrop (Rhodiola rosea) flowers, Vaygach Island, Arctic, Russia, July

Robin Chittenden / Roseroot (Rhodiola rosea) viewed from directly above, Iceland June

Niall Benvie / Roseroot (Rhodiola rosea) growing on cliffs, Lunga, Scotland, UK, May.

Philippe Clement / Golden root (Rhodiola rosea) in flower, Gran Paradiso National Park, Italy, June

Adrian Davies / Roseroot (Rhodiola rosea) Torridon, Scotland, June.

Alex Hyde / Rose-root (Rhodiola rosea) growing on sea cliff, Isle of Lunga, Treshnish Isles, Scotland, June.

Alex Hyde / Rose-root (Rhodiola rosea) growing on sea cliff, Isle of Lunga, Treshnish Isles, Scotland, June.

Adrian Davies / Rose root (Rhodiola rosea) in flower, Shetland Islands, Scotland, UK, May.

Adrian Davies / Rose root (Rhodiola rosea) in flower, Shetland Islands, Scotland, UK, May.

Chris Mattison / Roseroot (Rhodiola rosea) growing from cliff, Isle of Lunga, Treshnish Isles, Scotland, June.

Juergen Freund / Soft coral (Dendronephthya sp.) attached to a mangrove root. North Raja Ampat, West Papua, Indonesia, February 2010.

Juergen Freund / Soft coral (Dendronephthya sp.) attached to a mangrove root, seen from below, with mangrove foliage visible through the water. North Raja Ampat, West Papua, Indonesia, February 2010.

Juergen Freund / Soft coral (Dendronephthya sp.) attached to a mangrove root. North Raja Ampat, West Papua, Indonesia, February 2010.

Konstantin Mikhailov / Rose-root (Rodiola rosea) in Alpine mats of South Altai Region, Siberia, Russia, June, 2500m

Tim Fitzharris / Sego Lily (Calochortus nuttallii) group, state flower of Utah with bulbous edible root, Canyonlands National Park, Utah

Nigel Cattlin / Dry spilt seed of a Runner bean (Phaseolus coccineus) showing embryo cotyledons, hypocotyl, plumule and root apis, Berkshire, England, UK.

David Hall / Mangrove roots with Soft corals (Dendronephthya sp.) and decaying mangrove leaves, Misool, Raja Ampat, Indonesia, Pacific Ocean.

David Hall / Mangrove roots with colorful Soft corals (Dendronephthya sp.) on seabed and Banded archerfish (Toxotes jaculatrix) swimming above near the surface, Misool, Raja Ampat, Indonesia, Pacific Ocean.

David Hall / Mangrove red snapper (Lutjanus argentimaculatus) swimming among mangrove roots with Soft corals (Dendronephthya sp.) and green algae (Halimeda sp.), Raja Ampat, Indonesia, Pacific Ocean.

Robin Chittenden / Roseroot (Rhodiola rosea) in flower, Iceland. June.

Paul Harcourt Davies / Purple mountain lettuce (Prenanthes purpurea) in flower, Mount Amiata, Tuscany, Italy. July.

Nick Upton / Coralroot (Cardamine bulbifera), a rare plant in the UK, with distinctive bulbils on the stem which can drop off and take root, flowering in calcareous woodland, near Bath, UK. April.

Nick Upton / Coralroot (Cardamine bulbifera), a rare plant in the UK, with distinctive bulbils on the stem which can drop off and take root, flowering in calcareous woodland, near Bath, UK. April.

Nick Upton / Coralroot (Cardamine bulbifera), a rare plant in the UK with distinctive bulbils on the stem which can drop off and take root, flowering, close up, near Bath, UK. April.

Paul Harcourt Davies / Rattlesnake root purple lettuce (Prenanthes purpurea) in flower, Tuscany, Italy. July.

Paul Harcourt Davies / Tragopogon x mirabilis, a natural hybrid between Goat's beard (Tragopogon pratensis) and Salsify (Tragopogon porrifolius) found in several colour forms, Umbria, Italy. May.

Chris Mattison / Alpine Lewisia or Pygmy Bitterroot (Lewisia pygmaea) native to Western North America.

Paul Harcourt Davies / Roseroot (Rhodiola rosea). Ciampac, Fassa Valley, Dolomites, Trentino, Italy. June.

Paul Harcourt Davies / Roseroot (Rhodiola rosea). Ciampac, Fassa Valley, Dolomites, Trentino, Italy. June.

Paul Harcourt Davies / Roseroot (Rhodiola rosea), mountains in background. Near Ciampac, Fassa Valley, Dolomites, Trentino, Italy. June 2019.

Paul Harcourt Davies / Roseroot (Rhodiola rosea) in grassland, mountains in background. Near Ciampac, Fassa Valley, Dolomites, Trentino, Italy. June 2019.

Guy Edwardes / Pacific coralroot (Corallorhiza mertensiana). Banff National Park, Alberta, Canada. June.

Orsolya Haarberg / Coastal landscape with marble formations and cushions of roseroot (Rhodiola rosea). Tomma Island, Helgeland Archipelago, Norway. July.

Mike Read / Striped coralroot orchid (Corallorhiza striata) amongst dead branches, Mammoth Hot Springs, Yellowstone National Park, Wyoming, USA, June.

Nigel Cattlin / A crop of Field or Fava beans (Vicia faba) flowering. Used for animal food and as a break crop to replace soil nitrogen levels

Erlend Haarberg / Golden root (Rhodiola rosea) in front of the mountain Kyrkja, Jotunheimen National Park, Norway, July.