See text Kosteletzkya[1] is a genus of the plant family Malvaceae that includes the seashore mallow (K. pentacarpos).

[2] Although similar in appearance to Hibiscus, Kosteletzkya typically bears more flattened capsules that dehisce loculicidally.

The genus was separated from Hibiscus in 1835 by Carl Borivoj Presl, who named it after Vincenz Franz Kosteletzky (1801–1887).

[3] Phylogenetic evidence supports this genus being polyphyletic, with New World and Malagasy species of Kosteletzkya belonging to completely different clades within the Hibisceae.

These species are recognized by Plants of the World Online as of June 2022:[2] This Hibisceae article is a stub.