Rubiaceae

Pygmaeothamnus Robyns

First published in Bull. Jard. Bot. État Bruxelles 11: 29 (1928)
This genus is accepted
The native range of this genus is Burundi to S. Africa.

Descriptions

Rubiaceae, D. Bridson. Flora Zambesiaca 5:2. 1998

Morphology General Habit
Suffrutescent herbs, mostly under 30 cm tall, with several to many stems from a woody rhizome.
Morphology Leaves
Leaves opposite or in whorls of 3–4, mostly fairly shortly petiolate; stipules triangular, usually shortly subulate-caudate at the apex.
Morphology Reproductive morphology Flowers
Flowers in simple or branched cymes or fascicles, sometimes borne at lower often leafless nodes; bracts small.
Morphology Reproductive morphology Flowers Calyx
Calyx limb-tube ± obsolete; lobes 5, erect, linear-oblong, oblong, lanceolate or ± triangular, obtuse or subacute.
Morphology Reproductive morphology Flowers Corolla
Corolla shortly apiculate, usually 5-tailed in bud; tube cylindric, glabrous or pubescent, with a ring of deflexed hairs within, sparsely to densely pilose at the throat; lobes reflexed, usually shortly apiculate, glabrous within, about equalling the tube.
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens inserted at the throat, the anthers oblong or lanceolate, just exserted.
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary 2-locular, each locule with a solitary pendulous ovule; style slender, slightly exserted; pollen presenter cylindric or subcapitate, deeply bilobed.
Morphology Reproductive morphology Fruits
Fruit globose or obpyriform, didymous or asymmetrical, containing (1)2 pyrenes.
[FZ]

Rubiaceae, B. Verdcourt. Flora of Tropical East Africa. 1976

Morphology General Habit
Subshrubby herbs mostly under 30 cm. tall, with several–many stems from a woody rhizome
Morphology Leaves
Leaves opposite or in whorls of 3–4, mostly fairly shortly petiolate; stipules triangular, usually shortly subulate-caudate at the apex
Morphology Reproductive morphology Flowers
Flowers in simple or branched cymes or fascicles, sometimes borne at lower often leafless nodes; bracts small
Morphology Reproductive morphology Flowers Calyx
Calyx-lobes 5, erect, linear-oblong, oblong, lanceolate or ± triangular, obtuse or subacute
Morphology General Buds
Buds shortly apiculate, usually 5-tailed, glabrous or pubescent
Morphology Reproductive morphology Flowers Corolla
Corolla-tube cylindric, with a ring of deflexed hairs within, sparsely to densely pilose at the throat; lobes reflexed, usually shortly apiculate, glabrous within, about equalling the tube
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens inserted at the throat, the anthers oblong or lanceolate, just exserted
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary 2-locular, each locule with a solitary pendulous ovule; style slender, slightly exserted; stigmatic club cylindric or subcapitate, deeply bilobed
Morphology Reproductive morphology Fruits
Fruit globose or obpyriform, didymous or asymmmetrical, containing (1–)2 pyrenes.
[FTEA]

Sources

  • 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

    • 'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.

  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2025. 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 2025. 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