Elytraria marginata Vahl

First published in Enum. Pl. 1: 108 (1804)
This species is accepted
The native range of this species is W. Tropical Africa to Uganda and Angola. It is an annual or perennial and grows primarily in the wet tropical biome.

Descriptions

Acanthaceae, H. Heine. Flora of West Tropical Africa 2. 1963

Morphology General Habit
Stem up to 9 in. high
Morphology Reproductive morphology Flowers
Small white or bluish flowers 1/4-1/3 in. long in narrow stiff spikes sharp-pointed bracts.
[FWTA]

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: not threatened. Confidence: confident
[AERP]

Acanthaceae (part 1), Kaj Vollesen, Flora of Tropical East Africa, 2008

Morphology General Habit
Annual or short-lived perennial herb, basal part of stem creeping and rooting, apical part erect, 2–18 cm long, subglabrous to crisped-puberulous.
Morphology Leaves
Leaves sometimes mottled, in a terminal rosette (rarely an extra whorl of leaves on middle part of stem), subsessile or petiole up to 5(–10) mm long; lamina elliptic-obovate, largest 7–17 × 2.5–5.5 cm, apex acute to subacute, base attenuate to cuneate, margin entire to faintly crenate; below sparsely crisped-puberulous along veins, above with sparse long hairs along midrib and uniformly scattered hairs on lamina.
Morphology Reproductive morphology Inflorescences
Spikes 2–13 cm long, unbranched (rarely branched); peduncle 1–8 cm long; sterile bracts not imbricate or ± imbricate towards apex of peduncle, broadly ovate-elliptic, 3–6 mm long, acute to acuminate, glabrous but for finely ciliate margin, indistinctly keeled; fertile bracts green with scarious white margin, broadly ovate-elliptic, 4.5–7 mm long, acute to acuminate, glabrous but for finely ciliate margin, indistinctly keeled; bracteoles lanceolate to narrowly elliptic, 3–4 mm long, subacute to acute, crisped-puberulous in a central band and finely ciliate near apex.
Morphology Reproductive morphology Flowers Calyx
Sepals 4–5 mm long, ciliate in apical half, otherwise glabrous; dorsal elliptic or broadly so, acute; lateral elliptic or narrowly so, with a dorsally attached seta ± 1 mm long; ventral lanceolate to narrowly elliptic, acute to acuminate.
Morphology Reproductive morphology Flowers Corolla
Corolla white, often cleistogamous or only opening partially; tube 3–4 mm long; lobes 2–3 mm long.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 2, subsessile; anthers ± 0.5 mm long.
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma erect and spathulate or rounded and ± bent in cleistogamous flowers.
Morphology Reproductive morphology Fruits
Capsule 4–5 mm long, glabrous.
Morphology Reproductive morphology Seeds
Seed ± 0.75 mm long.
Figures
Fig. 1, 8–9.
Distribution
Range: Uganda. Range: West Africa to S Sudan and south to Angola Range: West Africa to S Sudan and south to Angola Flora districts: U2 U4
Ecology
Wet evergreen forest ground floor; 700–1300 m
[FTEA]

Sources

  • Angiosperm Extinction Risk Predictions v1

    • Angiosperm Threat Predictions
    • http://creativecommons.org/licenses/by/4.0
  • Flora of Tropical East Africa

    • Flora of Tropical East Africa
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • Flora of West Tropical Africa

    • Flora of West Tropical Africa
    • 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
  • Kew Science Photographs

    • Copyright applied to individual images