Peoniae florentes.

Plagae Caelorum
peoniae florentes
in hortis magnis.

[Yosa Buson #253.]
hiro-niwa no / botañ ya teñ no / ippô ni.

"broad/big garden(s)'s/of/in // peony(-ies) -- heaven(s) 's/of //
one-direction/corner/side (i.e. the other side) in/to/on."

NB > plagae is in the feminine genitive singular,
the only singular in this haiku !!