Sapindus saponaria

Sapindus saponaria is a small to medium-sized deciduous tree native to the Americas. Common names include rocky mountain maple, wingleaf soapberry, western soapberry, jaboncillo, sulluku and manele and a'e (Hawaiian). Its genus name, Sapindus, comes from the Latin, meaning Indian soap, and its specific epithet means "soapy".

Western Soapberry is closely related to the maple family of trees.

Although western soapberry lumber is not harvested commercially due to its rarity, it was highly esteemed in the recent past by indigenous ethnic groups like the Plains Apache, for its hardness and resilience.

Western soapberry is classified as a "least concern" species, and due to its hardiness, it thrives in regions with poor soil and extreme drought. However, agricultural development threatens the existence of certain local communities in south-central Oklahoma.

The fruit of western soapberry is mildy toxic if ingested orally, due to the high saponin content. The high saponin content also allows for the fruit to be used as a form of lathering soap. Despite the mild oral toxicity, the fruits of soapberry species may have topical health benefits.