Petals free or almost so, yellow to red or purplish red, subglobose-urceolate, S-shaped in longitudinal section, apically extrorsely vaulted curved, base concave, apex sometimes thickened.

• 花瓣离生或几乎如此，同数的雄蕊花瓣，着生于萼片，稍短于花瓣。