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Photo credits
- Leaf photos come from Wikimedia Commons. The photographers are:
- Magnus Manske (Holly, Sweet Chestnut) · CC BY-SA 3.0
- Alghul96 (Horse Chestnut) · CC BY-SA 4.0
- Bogdan (London Plane) · CC BY-SA 3.0
- Boynamedkarl (Pine) · CC BY-SA 4.0
- Cossey25 (Spruce) · CC BY-SA 4.0
- Crusier (Cedar) · CC BY 3.0
- Crusier (Tulip Tree) · CC BY-SA 3.0
- Daniel Capilla (Fig) · CC BY-SA 4.0
- Didier Descouens (Yew) · CC BY-SA 4.0
- Famartin (Juniper) · CC BY-SA 3.0
- Forest and Kim Starr (Coconut Palm) · CC BY 3.0
- Forest and Kim Starr (Eucalyptus) · CC BY 3.0 us
- Franz van Duns (Ginkgo) · CC BY-SA 4.0
- Gmihail (Linden) · CC BY-SA 4.0
- Ilya Katsnelson (Coast Redwood) · CC BY 2.0
- John Tann (Willow) · CC BY 2.0
- Jonatan Svensson Glad (Rowan) · CC BY-SA 4.0
- Jules Verne Times Two (Sweetgum) · CC BY-SA 4.0
- Macleay Grass Man (Hawthorn) · CC BY 2.0
- Mike Pennington (Birch) · CC BY-SA 2.0
- Pastilletes (Fir) · CC BY-SA 2.0
- Derek Ramsey (Ram-Man) (Oak) · GFDL 1.2
- Rosser1954 (Monkey Puzzle) · CC BY-SA 4.0
- Sten Porse (Olive) · CC BY-SA 3.0
- Stiller Beobachter (Hornbeam) · CC BY 2.0
- Superior National Forest (Maple) · CC BY 2.0
- Tom elm (Elm) · CC BY-SA 4.0
- Unknown Commons uploader (Hazel) · CC BY-SA 3.0
- Willow (Beech) · CC BY 2.5
- Yogdes (Cypress) · CC BY-SA 4.0
- Dimìtar Nàydenov (Poplar) · CC BY-SA 3.0
- These photos are in the public domain: Ash, Alder, Walnut, Larch.
Rules & what counts
Tree Leaf Quiz: Rules & What Counts
Name 36 trees from a photo of the leaf. A conifer shows its shoot with the needles, the palm shows its frond.
The answer is the everyday name of the tree: oak, maple, birch, pine. The photo shows one common species of each (the English oak, the sugar maple, the Scots pine), and the species name counts too.
A correct answer shows the botanical name of the tree in the photo under the common name.
How to play
- Start typing anywhere; the answer bar catches it automatically.
- The game accepts a tree as soon as you spell it. You do not press Enter.
- Each tree accepts the "tree" form and its regional names: "conker tree" for horse chestnut, "mountain ash" for rowan, "lime" for linden.
- Select a card to enlarge the photo. The whole leaf is in the frame.
- Select Give up to see the trees you missed and to save your score.
What counts in this quiz
- 36 trees: 24 broadleaf trees, 11 conifers and the coconut palm.
- The common name counts, the species in the photo counts, and the genus counts where people use it: "quercus", "acer", "betula".
- "Sycamore" opens the London plane card, which is what the word means in North America. In Britain the sycamore is a maple, so there is no second maple card.
- The leaderboard ranks the number of trees named, then the time.
What's not included, and why
- Only the exact spelling counts, with the common misspellings added by hand. There is no fuzzy matching.
- "Chestnut" opens the sweet chestnut card only. The horse chestnut is not a true chestnut, and its leaf looks nothing like one.
- Bark, flowers, fruit and the whole tree are not shown. The leaf is the only clue.
Good to know
- The ginkgo is the last of its kind. Its family was already old when the dinosaurs lived.
- The coast redwood is the tallest tree on Earth, at more than 115 metres. Its leaves are tiny flat needles.
- The larch is the one conifer in the quiz that drops its needles every autumn.
- A maple leaf is on the flag of Canada. The leaf in the quiz is the sugar maple, the source of maple syrup.