Anthurium 'Red crystallinum'Anthurium 'Red crystallinum' at a glance: Anthurium 'Red Crystallinum' keeps the broad velvet, heart shaped outline associated with crystallinum types, but adds a red flush to the venation and often to fresh petioles or newly opened foliage. Indoors it usually remains moderate in size, around 60 cm tall, with leaves that can reach about 30 cm across when conditions are steady. Bright indirect light, warmth between 1826C, and humidity around 6080% help