Morning Glories: First Bloom - Quintana Roo, Mexico MG, 1 by atenkley

atenkley wrote:
Ron, yes, I measured the corolla width on the first bloom (70mm) as indicated in the first post. Today, there are three blooms, measuring 60,60, and 59mm, about four week later in the diminishing season.

Is there a standard method to measure tube length? If I measure from the base of the sepals to the rim of the corolla, it seems dificult to get repeatable measurements due to some moving targets! Now I am just using a straight ruler and not a caliper.... I seem to get results very close to the corolla width....like it could fit in a cube....but I'm not confident in this dimension.

Are there two fixed points commonly used to measure tube length for Ipomoea?

...here is a mg shot of one of the blooms today..