Lentibulariaceae
Utricularia

Utricularia spiralis Sm.

First published in A.Rees, Cycl. 37: n.° 5 (1818)
This species is accepted
The native range of this species is Tropical Africa. It is a perennial and grows primarily in the seasonally dry tropical biome.

Descriptions

Lentibulariaceae, P. Taylor. Flora of Tropical East Africa. 1973

Morphology General Habit
Terrestrial herb.
Morphology General Rhizoids
Rhizoids and stolons capillary, numerous from the base of the scape.
Morphology Leaves
Leaves few, usually decayed at anthesis, leaf-opposed on the stolons, linear, up to 5 cm. long and 2.5 mm. wide, 1–3-nerved.
Morphology General Traps
Traps numerous, globose, shortly stalked, glandular, 0.6–1.0 mm. long; mouth basal; upper lip with 2 simple subulate appendages.
Morphology Reproductive morphology Inflorescences
Inflorescence erect or usually twining, 5–50 cm. high; scape filiform, glabrous; flowers 1–15, usually distant; scales few, similar to the bracts; bracts basifixed, broadly ovate, ± 2 mm. long; bracteoles linear-lanceolate, usually shorter than the bracts; pedicels erect or ascending, 3–6 mm. long at anthesis, up to 15 mm. long in fruit, flattened or ± narrowly winged, always longer than the fruiting calyx.
Morphology Reproductive morphology Flowers Calyx
Calyx-lobes subequal, ovate to narrowly ovate, apex of upper acute, of lower minutely bidentate.
Morphology Reproductive morphology Flowers Corolla
Corolla usually violet with a dark blue, greenish, yellow or white spot in the throat, rarely wholly yellow or white, 5–30 mm. long; upper lip narrowly oblong to orbicular; lower lip orbicular; palate raised; spur usually curved, acute or rarely obtuse.
Morphology Reproductive morphology Flowers Androecium Stamens
Filaments linear; anther-thecae subdistinct.
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary ovoid; style indistinct; stigma-lips short, truncate, subequal.
Morphology Reproductive morphology Fruits
Capsule narrowly ovoid, dehiscing by a longitudinal abaxial slit; capsule-wall of uniform thickness.
Morphology Reproductive morphology Seeds
Seeds numerous, globose, 0.2–0.3 mm. in diameter; testa thin, cells distinct, ± isodiametric.
[FTEA]

Lentibulariaceae, P. Taylor. Flora Zambesiaca 8:3. 1988

Morphology General Habit
Terrestrial herb.
Morphology General Rhizoids and Stolons
Rhizoids and stolons capillary, numerous from the base of the peduncle.
Morphology Leaves
Leaves few, usually decayed at anthesis, leaf-opposed on the stolons, linear, up to 5 cm. ×2.5 mm., 1–3-nerved.
Morphology General Traps
Traps numerous, globose, shortly stalked, glandular, 0.6–1.0 mm. long; mouth basal, with 2 dorsal simple subulate appendages.
Morphology Reproductive morphology Inflorescences
Inflorescence erect or usually twining, 20–70 cm. high; peduncle filiform, glabrous; flowers 3–10, usually distant; scales few, similar to the bracts; bracts basifixed, broadly ovate, 2 mm. long; bracteoles linear-lanceolate, usually shorter than the bracts; pedicels erect or ascending, 5–15 mm. long, flattened or more or less narrowly winged, always longer than the fruiting calyx.
Morphology Reproductive morphology Flowers Calyx
Calyx lobes subequal 3–6 mm. long, ovate to narrowly ovate with apex of upper acute, of lower minutely bidentate.
Morphology Reproductive morphology Flowers Corolla
Corolla usually violet with a dark blue, greenish, yellow or white spot in the throat, rarely wholly yellow or white, 1–3 cm. long; superior lip oblong to circular; inferior lip circular; palate raised; spur subulate, usually curved, acute.
Morphology Reproductive morphology Flowers Androecium Stamens
Filaments linear; anther-thecae subdistinct; ovary ovoid; style indistinct; stigma-lips short, truncate, subequal.
Morphology Reproductive morphology Fruits
Capsule narrowly ovoid, dehiscing by longitudinal dorsal and ventral slits; capsule-wall of uniform thickness.
Morphology Reproductive morphology Seeds
Seeds numerous, globose, 0.2–0.3 mm. in diam.; testa thin, cells distinct, more or less isodiametric.
[FZ]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/85742998/143984554

Conservation
LC - least concern
[IUCN]

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]

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