Euphorbiaceae
Euphorbia

Euphorbia citrina S.Carter

First published in Kew Bull. 45: 331 (1990)
This species is accepted
The native range of this species is E. Zimbabwe to W. Mozambique. It is a shrub and grows primarily in the seasonally dry tropical biome.

Descriptions

Extinction risk predictions for the world's flowering plants to support their conservation (2024). Bachman, S.P., Brown, M.J.M., Leão, T.C.C., Lughadha, E.N., Walker, B.E. https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.19592

Conservation
Predicted extinction risk: threatened. Confidence: confident
[AERP]

Euphorbiaceae, S. Carter & L.C. Leach. Flora Zambesiaca 9:5. 2001

Morphology General Habit
Straggly shrub 0.5–3 m high; branches minutely pubescent, leafless below and marked with crowded leaf scars.
Morphology Leaves
Leaves subsessile, glabrous except sometimes for a few hairs at the base; petiole c. 1 mm long, flattened, pubescent; lamina to 4.5 × 1 cm, lanceolate to linear-lanceolate, rounded at the apex and minutely apiculate, cuneate at the base, entire at the margin.
Morphology Reproductive morphology Inflorescences
Cymes axillary and terminal, 5–15 clustered in pseudumbels at the branch apices, each 2–4-forked, with primary rays to 3 cm long.
Morphology Reproductive morphology Inflorescences Bracts
Bracts sessile, c. 10 × 8 mm, ovate, yellow.
Morphology Reproductive morphology Inflorescences Cyathia
Cyathia on peduncles 1–2 mm long, c. 3.5 × 4.5 mm, with cup-shaped involucres; glands 4, spreading, c. 1.3 × 2.5 mm, suborbicular or crescent-shaped with 2 blunt points or 2 horns to 0.8 mm long; lobes erect, 1.3 × 1.3 mm, quadrangular, apex distinctly 2-toothed with ciliate margins.
sex Male
Male flowers: bracteoles linear, minutely pubescent; stamens 5 mm long.
Morphology Reproductive morphology Flowers
Female flower: ovary glabrous; styles 2.5 mm long, joined for 1 mm, with spreading slightly thickened bifid apices. Male flowers: bracteoles linear, minutely pubescent; stamens 5 mm long.
sex Female
Female flower: ovary glabrous; styles 2.5 mm long, joined for 1 mm, with spreading slightly thickened bifid apices.
Morphology Reproductive morphology Fruits
Capsule exserted on a reflexed pedicel to 7 mm long, 4.5 × 5 mm, deeply 3-lobed.
Morphology Reproductive morphology Seeds
Seeds 2.8 × 2 mm, oblong, smooth, shiny black; caruncle 1 mm across.
[FZ]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0

  • Flora Zambesiaca

    • Flora Zambesiaca
    • http://creativecommons.org/licenses/by-nc-sa/3.0

  • Herbarium Catalogue Specimens

    • Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0

  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0