Typical Japanese Bitterwood (Picrasma quassioides var. quassioides)

shrubby bitterwood Indian quassia wood

Picrasma quassioides var. quassioides: Bitterwood Guide

Growing as a deciduous shrub or small tree, this variety thrives in montane forests across East Asia. Its wood and bark contain intense bitter compounds that serve as a natural defense mechanism against herbivores.

It plays a significant role in traditional Asian medicine and ecological systems.

Taxonomy

  • ∟ царство Plantae
  • ∟ division Tracheophytes (Vascular Plants)
  • ∟ subdivision Spermatophytes (Seed plants)
  • ∟ Angiosperms
  • ∟ mesangiosperms (Core angiosperms)
  • ∟ eudicots
  • ∟ Superrosids
  • ∟ rosids
  • ∟ malvids
  • ∟ order Sapindales
  • ∟ family Simaroubaceae (Quassia family)
  • ∟ genus Picrasma (Bitterwood Tree)
  • ∟ species Picrasma quassioides (India quassia)
  • ∟ variety Picrasma quassioides var. quassioides (Typical Japanese Bitterwood)

Living Pulse

Morphology

The variety is recognized by:

  • Pinnate leaves with 9 to 15 finely serrated leaflets
  • Greenish-yellow flowers arranged in axillary corymbose cymes
  • Red obovoid drupes that turn black when fully mature

Applications

Common applications include:

  • Gastrointestinal remedies targeting indigestion and parasites
  • Agricultural pest control using natural leaf extracts
  • Woodcraft for carving small durable utensils

Interesting facts

The wood is so bitter that insects rarely attack it. Extracts have been historically used as a hops substitute in brewing beer.

Geography of distribution

  • China
  • Japan
  • Korea
  • India

Sources

  • Govaerts, R. et al. (2025). Plants of the World Online. Kew Science.
  • World Flora Online (WFO).
  • GBIF Secretariat (2025).

Technical Information

External Databases: GBIF

See also

True Araucarias

True Araucarias

Araucaria sect. Araucaria

Araucaria sect. Araucaria is a botanical section of evergreen conifers native to South America. It …