Small Anthuriums can be everblooming. Crossandra. Sinningia. Streptocarpus.
Schlumbergera are moist forest epiphytes that would be expected to do well in a terrarium. Blooming is triggered by lengthening fall nights. Turning on an electric light just one night will prevent blooming. Their close relatives Rhipsalidopsis (Easter cactus) look very similar vegetatively. Their flowers are borne similarly to Schlumbergera, and are similarly colored, but are radially symmetric rather than zygomorphic. Rhipaslidopsis flower in spring, and are not sensitive to night length.
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