Definition

Noun: 1. A tropical American semi-evergreen tree (Senna septemtrionalis, formerly Cassia laevigata) characterized by erect clusters of pink or rose-colored flowers, often cultivated for ornamental purposes. 2. An East Indian tree (Senna auriculata, formerly Cassia auriculata) known for its long seed pods containing a dark, cathartic pulp historically used as a veterinary medicine for horses.

Usage Examples

• The horse cassia in the botanical garden is in full bloom, its pink flowers attracting many bees.
• Traditional remedies sometimes included pulp from the horse cassia pod to treat digestive issues in livestock.

Advanced Usage

• The term is primarily used in botanical, horticultural, or historical veterinary contexts. In modern taxonomy, the trees are more accurately classified under the genus .

Variants and Related Words

• Cassia: The broader genus name to which these plants were historically assigned.
• Senna: The current genus for these plants, also referring to the medicinal leaves of some species.
• Pink Shower Tree: A common name for the ornamental .
• Tanner's Cassia: A common name for .

Synonyms

• (For the ornamental tree): Pink cassia, Arsenic bush (regional).
• (For the medicinal tree): Avaram senna, Tanner's senna.

Notes on Different Meanings

The term "horse cassia" refers to two distinct tree species, unified by the historical genus name Cassia and an association with horses—one for its ornamental value and the other for its historical veterinary use. The specific meaning is typically discerned from context (geographic location or discussion topic).

Noun

1. tropical American semi-evergreen tree having erect racemes of pink or rose-colored flowers; used as an ornamental
2. East Indian tree having long pods containing a black cathartic pulp used as a horse medicine