Brasenia schreberi J.F.Gmel.

First published in Syst. Nat., ed. 13[bis].: 853 (1791)
This species is accepted
The native range of this species is Africa, Temp. & Subtropical Asia, E. Australia, America. It is a hydrosubshrub and grows primarily in the wet tropical biome.

Descriptions

Cabombaceae, B. Verdcourt. Flora of Tropical East Africa. 1971

Morphology General Habit
Apparently glabrous aquatic with all submerged parts covered with a profuse clear slimy jelly-like mucilage; the outsides of the sepals and petals, the undersurfaces of the leaves, submerged petioles, pedicels, etc., are covered with minute purplish glandular hairs which may secrete this mucilage.
Morphology Leaves
Leaf-blades round or broadly elliptic, 2.5–11.5 cm. long, 1.5–7 cm. wide, entire, green above, usually reddish-brown or purplish beneath with 12 nerves radiating from the centre; petiole-length depending on the depth of the water, 0.05–1 m. long or more, slender, ±1.5 mm. in diameter.
Morphology Reproductive morphology Flowers Pedicel
Pedicels reddish-brown, 4–5 cm. long, 2 mm. in diameter.
Morphology Reproductive morphology Flowers Calyx
Sepals purplish- or brownish- red, elliptic or narrowly oblong, 0.9–1.4 cm. long, 3–6 mm. wide, rounded atthe apex.
Morphology Reproductive morphology Flowers Corolla
Petals crimson, purplish- or brownish-red, narrowly oblong or linear-oblong, 1.2–1.7 cm. long, 3–4 mm. wide, narrowly rounded at the apex.
Morphology Reproductive morphology Flowers Androecium Stamens
Filaments of the stamens filiform, 1 cm. long, papillose; anthers reddish, linear-oblong, 3.5 mm. long, apiculate.
Morphology Reproductive morphology Flowers Gynoecium Carpels
Carpels fusiform or narrowly ovoid, 5 mm. long, 1.5–2 mm. wide, sparsely papillose; stigma simple, 3–4.5 mm. long, papillose all over save for a narrow longitudinal area facing the perianth.
Morphology Reproductive morphology Fruits
Fruiting carpels ellipsoid or fusiform, 0.6–1 cm. long, 2–2.5 mm. wide; stigma persistent.
Morphology Reproductive morphology Seeds
Seeds pale brown, ellipsoid, 2.7–3.5 mm. long, 2–2.3 mm. wide.
Habitat
akes, swampy pools, etc.; 1120–2750 m.
Distribution
K3 T1 T7 U4 also known from Tertiary and interglacial deposits in Europe
[FTEA]

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]

Cabombaceae, H. Wild. Flora Zambesiaca 1:1. 1960

Morphology General Habit
Glabrous aquatic plant with all its submerged parts covered with a profuse, clear, slimy mucilage.
Morphology Leaves
Leaves floating, rotund, peltate, 7.5 (10) x 5–7 cm., margin entire, green above, reddish-brown or purplish below, nerves 12, radiating from the apex of the petiole, rather faint, petiole reddish-brown, attached at the centre of the leaf-blade, up to 1 m. or more long according to the depth of the water, c. 1.5 mm. in diam.
Morphology Reproductive morphology Flowers
Flowers solitary, axillary on reddish-brown peduncles up to c. 8 cm. long, c. 2 mm. in diam.
Morphology Reproductive morphology Flowers Calyx
Sepals purplish-brownish-red, petaloid, c. 1.4 x 0.3 cm., narrowly oblong, apex rounded.
Morphology Reproductive morphology Flowers Corolla
Petals similar to the sepals but slightly larger.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens with slender papillose filaments up to 1 cm. long; anthers reddish, 3.5 mm. long, narrowly oblong, apiculate at the apex.
Morphology Reproductive morphology Flowers Gynoecium Carpels
Carpels 5 x 2 mm., narrowly lanceolate-ovoid, sparsely papillose, stigma simple, 3 mm. long, papillose.
Morphology Reproductive morphology Fruits
Ripe carpels 7 x 2 mm., ellipsoid with a persistent stigma.
Morphology Reproductive morphology Seeds
Seeds 3.5 x 2.3 mm., ellipsoid, testa pale brown.
[FZ]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/185681/78457027

Conservation
LC - least concern
[IUCN]

Common Names

English
Water shield

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
  • Flora of Tropical East Africa

    • Flora of Tropical East 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/
  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/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
  • Plants and People Africa

    • Common Names from Plants and People Africa http://www.plantsandpeopleafrica.com/
    • © Plants and People Africa http://www.plantsandpeopleafrica.com http://creativecommons.org/licenses/by/3.0/