
According to Wikipedia, Renanthera, abbreviated as Ren. in horticultural trade, is a genus of large scrambling monopodial epiphytic and terrestrial species distributed from India, New Guinea, and through to the Philippines. Species in this genus produce a branched inflorescence containing numerous flowers ranging in color from yellow and orange to red. These flowers possess large lateral sepals.
Ideally they are grown in a basket or mounted, with
daily watering, like Vandas. They may be grown in pots with coarse media.
Fertilize weekly, heavily (full dose) while actively growing but less during
the cooler months. Common media includes coarse fir bark, charcoal, sphagnum
moss.



South Texas temperatures are ideal for these orchids as they want an intermediate to hot climate with good air movement and generally bright light. About 75% of them want direct sunlight. The rest want very bright light.
Grow these in hot conditions, or 75°F (24°C) to 85°F (29°C) at night. They may be tolerant of intermediate (68°F to 75°F or 20°C to 24°C) night temperatures and they would like a humid environment. 80% relative humidity in summer is about right



