I suggest this should be called: leaf lamina intramarginal vein (new PO:ID)
child of leaf lamina vein (PO:0020138): A phyllome lamina vein (PO:0025348) that is part of a leaf lamina vascular system (PO:0000048).
Definition from referred website (above):
An intramarginal vein is a vein of constant thickness (much thinner than the midrib) just inside the margin and extending from the base to the apex of the leaf blade (or leaflet blade in the case of compound leaves).
Proposed definition: leaf lamina intramarginal vein (new PO:ID): A leaf lamina vein (PO:0020138) that is just inside the leaf lamina margin (PO:0025009) and extends from the leaf base (PO:0020040) to the leaf tip (PO:0025142).
Comment: The leaf lamina intramarginal vein is much thinner than the leaf midvein (PO:0020139; syn: midrib), and is of constant thickness.
Note: I think it is better to use leaf tip (the apical most portion of a leaf) rather than leaf apex (it is not precisely defined how far toward the base from the tip a leaf apex extends)
Additional photos here: http://www.flickr.com/photos/xylopia/4659513712/
Question: do these occur in other phyllomes such as petals? If so we should also create a phyllome lamina intramarginal vein
Discussed at POC call 12-4-12 (http://wiki.plantontology.org/index.php/POC_Conf._Call_12-4-12):
leaf lamina intramarginal vein (PO:0025520): A leaf lamina vein (PO:0020138) that is just inside the leaf lamina margin (PO:0025009) and extends from the leaf lamina base (PO:0008019) to the leaf apex (PO:0020137).
broad synonym: intramarginal vein
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