Talk:Key:leaf type
Can you name some examples?
Hi, I think that the description would be clearer if you would provide some examples of what you mean by:
- Broadleaved woody vegetation. Mainly angiosperms, but also some conifers. - Which conifers?
- Needleleaved woody vegetation. This category includes all plants with needle-like leaves, even though they are not conifers. - Which non-conifers?
Thanks.
Chrabros (talk) 12:00, 10 June 2014 (UTC)
- In the value-page leaf_type=broadleaved you will find as example gingko. In leaf_type=needleleaved you can find as example acacia. The pictures are already included on leaf_type=*. --Rudolf (talk) 16:06, 23 June 2014 (UTC)
what do we do about palms (Arecaceae)
Palm trees do fall among the broadleaved plants, but to me it feels like we are missing specificity. wood=palm and type=palm, "verify it could be tagged with another tag". which one? Mariotomo (talk) 16:27, 16 February 2019 (UTC)
- @Mariotomo: If you want more answers to tagging questions I recommend tagging mailing list. Telegram OSM channel, Discord OSM channel etc may also be useful alternatives if someone wants some answers. OSM Wiki talk pages has relatively low traffic (copy from https://github.com/gravitystorm/openstreetmap-carto/issues/4256 ). Mateusz Konieczny (talk) 09:13, 2 December 2020 (UTC)
scale-like leaves?
I tried adding a tree with scale-like leaves and wasn't sure how to tag it. Here's an example: https://en.wikipedia.org/wiki/File%3A_Sawara.jpg I could just go with needleleaved since they seem to usually start out with needle like leaves from my quick search and look a bit needle-like, but wasn't sure TrekClimbing (talk) 20:37, 3 September 2021 (UTC)
- I think by convention these are tagged with needleleaved. If you compare quite closely related Redwoods, such as Giant Redwood Sequoiadendron giganteus with scale leaves & Coast Redwood (Sequoia sempervirens) or Dawn Redwood (Metasequoia) which have needle leaves similar to Yews. To date I think the only Gymnosperm tagged with broadleaved is Ginkgo. The Auracarias might be another group which it is difficult to call as the scale leaves are rather large. SK53 (talk) 20:09, 10 October 2021 (UTC)
- I marked ones looking like this as needleleaved Mateusz Konieczny (talk) 07:09, 11 October 2021 (UTC)
Distinction between broadleaved and needleleaved
The table of leaf type values currently states, "The values relate to the Land Cover Classification System (LCCS) by FAO." This appears to be a reference to rules D (Leaf Type) and E (Leaf Phenology) under section 2.3.3.1. It says in clear terms that broadleaved means angiosperms plus Ginkgo biloba, whereas needleleaved means gymnosperms minus Ginkgo biloba. That's a much clearer definition than the table here, which defines broadleaved as "Mainly angiosperms, but also some conifers." Would it be reasonable to adopt the LCCS definition for clarity, if ginkgo trees are the only reason for not straightforwardly mapping these values to well-documented clades? What is "some conifers" supposed to refer to anyways? A clearer definition would enable us to map these values to individual species in horticultural references or Wikidata with more certainty. – Minh Nguyễn 💬 05:37, 14 September 2022 (UTC)
- Good spot, I'd say yes. The query about scale leaves demonstrates that this is not easy to resolve without a precise definition. I'd also say several of the Acacias I come across are obviously broadleaved, but leaf_type=needleleaved explicitly says "some Acacias" (perhaps the common Silver Wattle Acacia dealbata which has very divided, bi-pinnate, leaves, see here). It's interesting that the FAO chose to separate out Gingko biloba, because it is very rare in (endangered) in natural environments and is most common as an ornamental or street tree, and thus is an unlikely value for a land cover classification. SK53 (talk) 16:20, 1 December 2022 (UTC)
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