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Toxicodendron diversilobum

Toxicodendron diversilobum

9.9
A poisonous shrub on the Pacific coast of North America that causes an itchy rash when touched
  • noun
  • /ˌtɒkɪˈkoʊdɛndrən ˌdaɪvərsɪˈloʊbəm/
  • Specialized
translation icon : Toxicodendron diversilobum
  • Many hikers develop a rash after brushing against Toxicodendron diversilobum on California’s trails.

Examples

  • Wearing long sleeves can help prevent contact with Toxicodendron diversilobum during forest work.

  • Many hikers are allergic to Toxicodendron diversilobum.

  • Toxicodendron diversilobum can be difficult to identify when it loses its leaves in winter.

  • Be careful around Toxicodendron diversilobum!

  • Many hikers develop a rash after brushing against Toxicodendron diversilobum on California’s trails.

  • Wearing long sleeves can help prevent contact with Toxicodendron diversilobum during forest work.

  • Be careful around Toxicodendron diversilobum if you have sensitive skin!

Synonyms

poison oak
vsToxicodendron diversilobum
  • US
3 6.5

A climbing or spreading plant with oak-like leaves that makes oil causing skin rash

is the specific Pacific coast shrub that causes an itchy rash when touched
western poison oak
vsToxicodendron diversilobum
  • US
7.9

A poisonous shrub on the west coast of North America that causes an itchy skin rash when touched

is the formal scientific name for that same shrub
Rhus diversiloba
vsToxicodendron diversilobum
  • Specialized
9.9

A poisonous bush on the Pacific coast that causes a skin rash when touched

is an alternative botanical name used for the same plant

Surface Forms

Morphology

Toxicodendron + diversilobum

This is a technical Latin binomial: the genus 'Toxicodendron' (given as a shrub that causes skin irritation) already conveys the core meaning of a poisonous/irritant plant, but the species epithet 'diversilobum' is Latin and not a common English word (no dictionary definition provided). Because the genus gives a clear clue while the specific epithet is specialized and not interpretable by a B1 learner, the overall transparency is partial rather than fully transparent or fully opaque.

Etymology

Toxicodendron diversilobum gets its name from old word parts: Toxicodendron means 'poison tree' and diversilobum shows its different leaves. People learned to avoid the plant because touching it gives a bad itchy rash, so the name is a warning that the plant is poisonous.