Hagi (bush clover) is one of the ‘seven flowers of autumn’ — a grouping with roots in classical Japanese poetry.
It’s also the subject of a silly little ditty of mine, in an ode to autumn pleasures (floral and culinary):
Oh, hagi,
how do I love thee,
let me count the ways.
Ohagi,
you’re such a sweet treat,
that brightens up my days.
And speaking of counting, it is the most frequently mentioned flower in the eighth-century Man’yōshū, the oldest extant collection of Japanese waka poetry. Here’s one example:
In autumn fields
I count the blossoms,
bending my fingers to
find there are seven.
Bush clover, silvergrass,
arrowroot, dianthus,
golden lace, thoroughwort,
and bellflower.
(My translation/interpretation of poems #1537 and #1538, by Yamanoue no Okura.)