Sinningia sulphurea

This species used to be known under the holding name "sp. Bahia".

It joins Sinningia conspicua and Sinningia richii in the short list of published sinningia species with yellow flowers. Sinningia allagophylla has a form with pale yellow flowers, although the normal flower color is red.

Feature table for Sinningia sulphurea

Plant Description
Growth	Indeterminate
Habit	Upright or recumbent stem(s), usually unbranched
Leaves	Green, decussate
Tubers	Plant has an underground storage system of many small [diameter up to 5 mm] tubers. It isn't clear whether dormancy has ever been observed.
Flowering
Inflorescence	axillary cyme of 1-3 flowers
Flowering	Flowers were observed in June and July in Brazil (corresponding to December and January in the Northern Hemisphere)
Flower	Open tubular, yellow, 3.5-5 cm long, with fine purple streaks on the floor of the corolla
Horticultural aspects
Hardiness	It was flowering in the middle of winter in Brazil. It might be at least somewhat cool-tolerant. Bahia state is in the tropical part of Brazil, however, and therefore quite a bit warmer than the more southern states. Salvador, the capital of Bahia, is at latitude 13* south, approximately. By comparison, the country of El Salvador is at about 13-14* north, which is well south of the United States, even Hawaii.
Botany
Taxonomic group	Its closest relative is S. barbata. That would place this species in the Corytholoma clade.
Location	Serra do Orobó in Bahia state of Brazil.

See Mauro Peixoto's Brazilian Plants site for a page about S. sulphurea.

Chautems and Cardoso in Candollea, 2022

This species is named for the yellow color of its flowers.