Goeppertia insignis (Rattlesnake Plant)

Goeppertia insignis, commonly known as rattlesnake plant, is a tropical evergreen perennial in the Marantaceae family, native to Brazil. It was formerly known as Calathea lancifolia and is still very commonly sold under that name in the houseplant trade. The plant forms upright clumps of long, narrow, lance-shaped leaves with strongly undulating margins. Their light to medium green upper surfaces are marked with alternating dark green oval blotches along both sides of the midrib, creating a distinctive feather-like pattern. The leaf undersides are deep burgundy to purple, adding a striking contrast. Plants typically reach about 2-3 ft tall and are grown primarily for their ornamental foliage.

Goeppertia insignis grows best in bright filtered light, warm temperatures, and high humidity. It prefers loose, organic-rich, well-drained soil kept evenly moist but not waterlogged. Strong direct sun can scorch or fade the leaves, while prolonged dryness may cause curling and brown margins. It is widely grown as a container and indoor plant and can be grown outdoors in warm, humid, frost-free gardens. Goeppertia insignis is suitable for USDA Zones 10b-11 and should be protected from cold.

See Article - How to grow Calathea indoors.