Upright myrtle spurge

Euphorbia rigida M.Bieb.

light
Sun–part
water
Little
tall
51 cm
wide
64 cm

Euphorbiaceae

Formerly Euphorbia biglandulosa, Euphorbia phlomos, Euphorbia suffruticosa, Galarhoeus rigidus, and 2 more

When it flowers

Not known yet in the tropics: too few flowering observations to read a season from.

PetsNC State Extension lists it as toxic to dogs and cats (25 Oct 2026)
PeopleNC State Extension lists it as mildly poisonous (leaves, sap, stems) (25 Oct 2026)

If a child, a pet or anyone may have eaten a plant, contact a doctor or vet straight away, or call the National Poisons Information Centre (AIIMS, New Delhi) on 1800 116 117, free and open 24 hours.

Something wrong with it?

About it

Grows as
Perennial or subshrubKew's checklist, not yet checked
Climate
TemperateKew's checklist, not yet checked
Wild in
NW. Africa, S. Europe to IranKew's checklist, not yet checked
Light
Full sun to part shade (3 h or more)Read from NC State Extension and Wikipedia, checked by a majority of its sourcesBacked by both sources
Height
51 cmRead from NC State Extension and Wikipedia, checked by a majority of its sourcesBacked by both sources. Sources differ: NC State Extension 1–2 ft; Wikipedia 50–50 cm
Spread
56 cm to 71 cmRead from NC State Extension and Wikipedia, checked: the middle of what its sources sayHalfway between its 2 sources, which differ. Sources differ: NC State Extension 2–3 ft; Wikipedia 50–50 cm
Water
Little: takes droughtRead from NC State Extension and Wikipedia, checked by a majority of its sourcesBacked by both sources
Flowers
Yellow, greenRead from NC State Extension and Wikipedia, checked by a majority of its sourcesBacked by both sources
Coldest it survives
-17.8 °C (USDA zone 7a)Read from NC State Extension, one source

Not known yet: heat, hottest it survives.

In other languages (1)

Polish
wilczomlecz mocny

Where this comes from

A fact “checked by a majority of its sources” was settled by a vote of the pages it was read from, not by a person reading it; one marked “one source” rests on that page alone. Anything else not marked checked has not been checked yet. Where nothing is known, the page says so rather than guess.