Senna bicapsularis is a species of the legume genus Senna, native to northern South America, from Panama south to Venezuela and Colombia, and also the West Indies. It is naturalised and invasive in several coastal areas in the tropics, including the Galápagos Islands and New Caledonia. Common names include Rambling Senna (formerly "cassia"), Christmas Bush, Money Bush, and Yellow Candlewood. It is a shrub growing to 3.5 m tall. The leaves are 2.5–9 cm long, pinnate, with six to eight leaflets; the leaflets are 1.6–4.5 cm long.

The Winter Cassia (Cassia bicapsularis or Senna bicapsularis) is a winter bloomer that puts on a wonderful floral display around the holiday season, The flowers are also very attractive to bees and butterflies and a favorite food plant for the larvae of sulphur and white butterflies. The plant, a member of the Royal Poinciana family, can be found in almost all the tropical areas of the world. The tree can be kept as a potted specimen with judicious pruning. Makes an excellent small specimen for limited-space areas such as street sides or parking lots.