Liatris Plants
Q.

Why does Gayfeather (Liatris) bloom from top down?

Zone 78750 | Anonymous added on October 19, 2019 | Answered

Most every plant with a flower stalk booms from bottom up. Why is Gayfeather different. There has to be some botanical explanation.

A.
A.Answers to this queston: Add Answer
GKH_Susan
Certified GKH Gardening Expert
Answered on October 19, 2019

I consulted several sources and didn't see any explanation as to why they open from the top down other that they do. It appears that all varieties of liatris do open from the top down.
Here is a photographic article, that further shows the flowers open on one side first.

http://www.microscopy-uk.org.uk/mag/indexmag.html?http://www.microscopy-uk.org.uk/mag/artsep09/bj-liatris.html

This article says that blooming from the top down extends the flowering period:
https://plants.usda.gov/plantguide/pdf/pg_lipy.pdf

Here is general information:

https://www.gardeningknowhow.com/ornamental/flowers/liatris/liatris-blazing-star.htm

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