As summer turns to fall, only one hardy plant remains in
flower on the Berry Prairie. We’ve had several good frosts already, and every
morning is crisp. But Liatris, also
known by the colorful names blazing star and gayfeather, hasn’t yet entirely
succumbed.
You might not guess from looking, that Liatris is member of the sunflower family (see Prairie Spotlight:The Asters). But at close range, each puffy, purple “flower” can be seen to be
made up of several small flowers, each with five little petals and two long
stigma branches.
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Our blazing stars are blazing out, but this one has made
seeds. We’re hoping for lots of seedlings come spring!
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Seeds of Liatris
are called achenes (like all sunflower family seeds). The hairs are called the
pappus, and assist in dispersal—just like the pappus on a dandelion seed.
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There are several species of Liatris that are found across North America (two just in the
Laramie Basin!)—the most common one in Wyoming is L. punctata, aka dotted blazing star (see below). This and several other
species are used as ornamentals because of their good looks, their appeal to
butterflies, and their tough constitution.
Their long taproots make them very drought tolerant—a trait that was
especially adaptive this summer!
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L. punctata in a Missouri prairie |
Written by Dorothy Tuthill, Berry Center