Contains 2 accepted taxa overall.

Characteristics
Kosteletzkya C.Presl
KOSTELETZKYA
Classification
MALVALES
Kosteletzkya
Citation
KOSTELETZKYA C. Presl, Reliq. Haenk. 2: 130, t. 70. 1835, nom. cons. vs. Thorntonia Reichenbach 1828.
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TYPE: Kosteletzkya hastata C. Presl
Species
Scientific Name Common Name Herbarium Specimens Status Photos
Kosteletzkya depressa WHITE FENROSE; WHITE FEN Native Endangered-State FAC (NWPL) FAC (DEP)
Kosteletzkya pentacarpos VIRGINIA SALTMARSH MALLOW Native OBL (NWPL) OBL (DEP)
[Family identification key]
1.  Petals 5–14 mm long, usually white, sometimes with pink blush, sometimes drying yellowish; calyx 3.2–6 mm long; fruits variously hairy but with long, curved or hooked, simple hairs on sutures; seeds minutely hairy
1.  Petals 15–45 mm long, usually pink, rarely white; calyx 7–11 mm long; fruits hairy throughout, sometimes minutely so; seeds glabrous
Genus Synonyms
Synonym Full Citation Basionym Type
Pentagonocarpus Pentagonocarpus Parlatore, Fl. Ital. 5: 105. 1873. TYPE: = Kosteletzkya C. Presl 1835.
Polychlaena Polychlaena Garcke, in Schweinfurth, Beitr. Fl. Aethiop. 56. 1867, non G. Don 1831. TYPE: Polychlaena adoensis Garcke, nom. illegit. (Hibiscus terniflorus Garcke)
Thorntonia Thorntonia Reichenbach, Consp. Regn. Veg. 202. 1828, nom. rej. vs. Kosteletzkya C. Presl 1835. TYPE: Hibiscus pentaspermus de Candolle