Is the leaf stem (petiole) going to count in the measurement for length? Also, I just discovered there are paper rulers that can be printed out for those who don't have a ruler. I think it would be nice if the ruler had both inches for those in the U.S. and centimeters for the rest of the world. The paper rulers are nice in that you do not have to squash your leaf flat to measure the width (they conform to the shape of the leaf. If you use a paper ruler make sure that it checked against a real ruler to make sure that it is accurate.
I already have a paper measuring tape from IKEA that I was going to use... It has inches on one side and centimeters on the other. I thought I'd use clips to hold it to the leaves, because it would be hard to hold camera, leaf AND measuring tape at the same time. :smily:
I already have one contribution and it's H. juannguoana:
(it's 22 cm long, which would be 8.8 inches)
I tied the plastic measuring tape to the stem and 0 is where the leaf starts (the tape folded out when I took the photo) and it was hard to see at the tip of the leaf. I'm sure using paper will be easier!
Another question... how about we sum up the biggest of each entered species?
Getting a good photo to show the leaf and make sure the markings on the ruler show is a lot harder than I thought. I think that a certain amount of trust will have to be involved. Here is the longest leaf I currently have access to: Hoya meliflua ssp. fraterna the from top edge to leaf curl came in at 26 centimeters or 10.2 inches
My ruler was 25cm, but the curl was 1cm below that. If I had flattened it out, the curl would have broken off.
Here is the plant that started it all. My Hoya latifolia is around 4 years old, and never really got "big" leaves until this year. I have two photos; the length is really hard to tell from the photo, but it is 23.25cm or 9.15 inches long and that does not count any of the stem which would add considerably to it. The width is clearly visible in the photo - 17.5cm or 6.88 inches.
I may have a wider leaf in the back, but at this time it is impossible to get at to photograph - maybe this weekend.