Rubiaceae

Agathisanthemum Klotzsch

First published in W.C.H.Peters, Naturw. Reise Mossambique 6(Bot., 1): 294 (1861)
This genus is accepted
The native range of this genus is Tropical & S. Africa, Comoros, Madagascar.

Descriptions

Rubiaceae, B. Verdcourt. Flora Zambesiaca 5:1. 1989

Morphology General Habit
Perennial herbs or small shrubs with simple or branched stems.
Morphology Leaves
Leaves sessile or nearly so, narrowly lanceolate to ovate or oblong; lateral nerves mostly strong; stipule sheath produced into a 3–15-fimbriated lobe.
Morphology Reproductive morphology Flowers
Flowers often heterostylous, small, in many-flowered cymes or corymbs or in subglobose heads.
Morphology Reproductive morphology Flowers Calyx
Calyx lobes 4, lanceolate to ovate-triangular, keeled.
Morphology Reproductive morphology Flowers Corolla
Corolla shortly tubular, densely hairy at the throat; lobes 4, often with some additional filamentous lobes between.
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary 2(3)-locular; ovules numerous on peltate placentas; style filiform, shortly hairy, usually undivided but sometimes bifid at the apex; stigma lobes subglobose or ovoid.
Morphology Reproductive morphology Flowers Disc
Disk farinose or very shortly pubescent.
Morphology Reproductive morphology Fruits
Capsule subglobose, produced into a conical beak which opens both loculicidally and septicidally.
Morphology Reproductive morphology Seeds
Seeds numerous, angular.
[FZ]

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

Morphology General Habit
Perennial herbs or small shrubs with simple or branched stems
Morphology Leaves
Leaves sessile or nearly so, narrowly lanceolate to ovate or oblong; lateral nerves mostly strong; stipule-sheath produced into a 3–13 fimbriated lobe
Morphology Reproductive morphology Flowers
Flowers usually heterostylous, small, in many-flowered cymes or corymbs or in subglobose heads
Morphology Reproductive morphology Flowers Calyx
Calyx-lobes 4, lanceolate to ovate-triangular, keeled
Morphology Reproductive morphology Flowers Corolla
Corolla shortly tubular, densely hairy at the throat; lobes 4, often with some additional filamentous lobes between
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary 2(–3)-locular; ovules numerous on peltate placentas; style filiform, shortly hairy, usually undivided but sometimes bifid at the apex; stigma-lobes subglobose or ovoid
Morphology Reproductive morphology Flowers Disc
Disc farinose or very shortly pubescent
Morphology Reproductive morphology Fruits
Capsule subglobose, produced into a conical beak which opens both loculicidally and septicidally
Morphology Reproductive morphology Seeds
Seeds numerous, angular.
[FTEA]

M. Thulin et al. Flora of Somalia Vol. 1-4 [updated 2008] https://plants.jstor.org/collection/FLOS

Morphology General Habit
Perennial herbs or subshrubs
Morphology Leaves Stipules
Stipule-sheath divided into narrow processes (fimbriae)
Morphology Reproductive morphology Flowers
Flowers usually heterostylous, in many-flowered cymes, 4-merous
Morphology Reproductive morphology Flowers Calyx
Calyx-lobes lanceolate to ovate-triangular
Morphology Reproductive morphology Flowers Corolla
Corolla shortly tubular, densely hairy at the throat; lobes valvate in bud
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary 2(–3)-celled; ovules numerous on peltate placentas inserted near the middle of the septum; stigma-lobes subglobose to ovoid
Morphology Reproductive morphology Fruits
Capsule subglobose with a conical beak, both loculicidally and septicidally dehiscent
Morphology Reproductive morphology Seeds
Seeds numerous, angular.
Distribution
Four species in tropical Africa and Madagascar.
[FSOM]

Sources

  • Flora Zambesiaca

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

  • Flora of Somalia

    • Flora of Somalia
    • 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

  • 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