Hibiscus trionum flower of an hour Malvaceae HITR*; NY, bl (Stalter and Tang 2002); R (DeCandido 2001);

   

Hibiscus trionum.Peter M. Dzuik.www.minnesotawildflowers.info

Hibiscus trionum.© Peter M. Dzuik.www.minnesotawildflowers.info. (Accessed 4/2014).

Hibiscus trionum is an annual herb to 50 cm tall, very hairy, branching. 

Leaves alternate, deeply 3-parted, middle lobe longest, segments oblong, coarsely toothed or lobed. 

Flowers pale yellow with purple center, broad, lasting only a few hours, petals 5, to 4 cm long, widest at top, calyx becoming infflated, 5-angled or winged, coarsely hairy. 

Fruit enclosed in hairy sepals; blooms and fruits July-Sept. 

Wetland status: UPL. 

Frequency in NYC: Very infrequent. 

Origin: Europe. 

Habitat: Open areas, roadsides.