Talk:Leaf

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Pictured leaf

For extra credit, name the type of leaf in the picture. :-) --LMS

Maple, but I'm not sure what species. Vicki Rosenzweig

Leaf me alone! Let's add a section on bad puns and idioms involving relating to the word leafInvertRect 00:50, 4 September 2006 (UTC)[reply]

OK, what kind of maple leaf, then? (I don't know if one would be able to tell just by looking at the leaf.) --Larry Sanger

Green and yellow. Probably the one Cummings wrote about. :o) --KQ

Replacement image

The "replacement leaf was not an improvement (too dark). Also, the photo has a useful caption that was apparently not read by the person that changed the photograph as it made no sense with the darker image - Marshman 18:33, 25 Mar 2004 (UTC)

Leaf boundry layer

I have added something about humidity air boundry layers to "adaptations". In general, the Adaptations category is overloaded, but I'm not sure where else it should go.

Are you sure about the rustling of leaves as an adaptation to reduce the boundary layer? i had always thought it was an adaptation to prevent damage to the leaves in wind. David D. (Talk) 17:31, 20 October 2005 (UTC)[reply]

Some pictures you could add

It would help to identify what is shown. The idea of looking at "interesting junk" sort of eliminates usefulness for the encyclopedia - Marshman 04:50, 26 January 2006 (UTC)[reply]

Well, two of them show a stoma...

Nevermind. They're already over there. :-) — Omegatron 06:11, 26 January 2006 (UTC)[reply]

Remember that the would stoma (pl. stomata means the opening in the plant epidermis. The opening with its surrounding cells is properly termed a stomatal complex (among other names), although stoma or stomata is often applied to the complete structure in the lietrature now. --EncycloPetey 20:34, 27 January 2006 (UTC)[reply]

(=

Twice in this document i have found an equals sign following an open bracket, is the equals sign really needed? wouldn't "(Middle Leaf)" be sufficient? Murdochious 09:30, 7 June 2006 (UTC)[reply]

dumb this down a bit

see above

You'll need to be more explicit. David D. (Talk) 19:50, 11 October 2006 (UTC)[reply]

adding an external link on leaf anatomy?

The following webpages present text information and microscopic images on leaf anatomy, in particular on the adaptation of leaves to various environmental conditions. Do you think this contribution to be worthwile to be linked?

[1]www.vcbio.science.ru.nl/en/virtuallessons/leaf/

get ready for RVs

less than 2 days off semi-protect, and 3 RVs already. Let's keep our eyes peeled for more unconstructive edits! Debivort 19:20, 21 November 2006 (UTC)[reply]

epiderpenis...?

"1 An epiderpenis that covers the upper and lower surfaces" Uh, I don't know much about leaves, but... Shouldn't this be epidermis or something rather than... epider-penis...? o_o

Guess that'd be one of those "unconstructive edits" I just read about. —The preceding unsigned comment was added by 216.14.157.144 (talk) 09:35, 14 March 2007 (UTC).[reply]

That's exactly right. You are welcome to fix the article next time you spot any trickery like this too... Debivort 17:18, 14 March 2007 (UTC)[reply]

When did the first leaf appear on Earth?

A "history" section of leaves should be added

Leaves have evolved independently at least three times. I beleieve the earliest leaves known as fossils are microphylls of Baragwanathia from the Upper Silurian, but this is not a precursor of what most people think of as leaves, since Baragwanathia was a Drepanophycalean lycophyte. --EncycloPetey 23:30, 18 April 2007 (UTC)[reply]

Leaf "above ground" ?

The article starts with explaining that leaves are above ground parts. Is that the best, and only way to describe it, considering the various places and directions that plants can grow? Or is that the most practical way to say it, allowing people to form their own conclusions about the few exceptions? M. D. Vaden of OregonMdvaden 05:05, 24 July 2007 (UTC)[reply]

Suggested image

An image of a water lilly would be a nice addition, as it's so unique. I'd normally add it myself but the article is pretty full as is, so it might require removing one or rearranging things a little. There should also be some mention of heterophylly (where plants have more than one type of leaf). Richard001 07:17, 8 September 2007 (UTC)[reply]

Leaves Excrete Water?

I've got a tropical like plant that I noticed appeares to be "sweating" with drops of water appearing on its leaves. Is this normal or a function of over-watering?Tom Cod 16:24, 20 October 2007 (UTC)[reply]

Without knowing more about the specifics of where your plant is located, what kind of plant it is, and the environment, it would be difficult to say. But in general, yes. One of the functions of leaves is to lose water by transpiration, thereby helping to pull mater and dissulved nutrients up from the roots. --EncycloPetey 16:27, 20 October 2007 (UTC)[reply]

It's normal. During the day the water in a plant is under tension due to transpiration from the leaf. At night when there is no transpiration, but water is still entering through the root, a positive pressure can be reached by morning. This result in the extrusion of xylem fluid from specialsed leaf cells called hydathodes. The phenomenon is know as guttation. David D. (Talk) 02:43, 2 November 2007 (UTC)[reply]

Protection

WHY IS THIS PAGE PROTECTED? IM GANNA FIND OUT WHO DID THIS —Preceding unsigned comment added by 68.127.90.49 (talk) 22:21, 16 February 2008 (UTC)[reply]

The page is temporarily protected (again) because the vast majority of edits made here by unregistred users have been vandalism or other non-constructive edits. See Wikipedia:Rough guide to semi-protection. --EncycloPetey (talk) 22:32, 16 February 2008 (UTC)[reply]

Too many pics?

Perhaps it's just me, but it seems as if there are too many pictures in this article in comparison to it's length. For example, there are three pictures of fall leaves, while one would suffice. --71.225.75.183 (talk) 18:51, 25 May 2008 (UTC)[reply]