General Plant Information (Edit)
Plant Habit: Shrub
Cactus/Succulent
Life cycle: Perennial
Sun Requirements: Full Sun to Partial Shade
Minimum cold hardiness: Zone 10b +1.7 °C (35 °F) to +4.4 °C (40 °F)
Plant Height: Up to 10 feet
Flowers: Other: In the genus Euphorbia, the flowers are reduced in size and aggregated into a cluster of flowers called a cyathium (plural cyathia). This feature is present in every species of the genus Euphorbia but nowhere else in the plant kingdom.
Suitable Locations: Xeriscapic
Dynamic Accumulator: B (Boron)
Resistances: Drought tolerant
Toxicity: Other: All members of the genus Euphorbia produce a milky sap called latex that is toxic and can range from a mild irritant to very poisonous.
Containers: Needs excellent drainage in pots
Miscellaneous: With thorns/spines/prickles/teeth
Conservation status: Vulnerable (VU)

Conservation status:
Conservation status: Vulnerable
Image
Common names
  • Monadenium
  • Euphorbia
Botanical names
  • Accepted: Euphorbia biselegans
  • Synonym: Monadenium elegans

Photo Gallery
Location: Baja California
Date: 2023-11-01
Fall, in yellowish light
Location: Baja California
Date: 2022-07-28
Leafing out and branching in mid summer
Location: Baja California
Date: 2023-08-04
Branching in early August
Location: Baja California
Date: 2022-09-02
Location: Baja California
Date: 2023-09-28
New stem growth (very seasonal)
Location: Baja California
Date: 2021-08-11
Location: Baja California
Date: 2021-08-24
Seasonal growth
Location: Baja California
Date: 2020-09-18
Location: Baja California
Date: 2021-08-05
Waking up late for summer
Location: Baja California
Date: 2021-08-24
Comments:
  • Posted by Baja_Costero (Baja California - Zone 11b) on Sep 26, 2020 4:11 PM concerning plant:
    Spiny shrub from Tanzania with brown, shredding papery bark and deciduous leaves. The main stem and the branches tend to grow sideways or even downward with time. Old plants in nature may reach over 10 feet tall. Leaf margins are wavy and the upper surface is marked with prominent veins. The cyathia are hooded and nodding (this species was formerly known as Monadenium elegans). This plant can be propagated from cuttings, which may take up to a year to root and leaf out. It displays a striking seasonal variation between the leafless phase and the period of active growth, which begins in late summer in our cool coastal climate.

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