Anthurium is a large genus of about 1000 species. Anthurium has large, lance-shaped or heart-shaped leaves and brightly colored, heart-shaped flower bracts. The real flowers are actually many tiny flowers growing along the spadix, arising from the base of the spathe. The species can grow up to 90 cm (3 ft) in height. Anthurium grows best in rich, well drained soil, with a pH between 5.5 and 6.5.