Afrotysonia Rauschert

First published in Taxon 31: 558 (1982)
This genus is accepted
The native range of this genus is E. Tropical & S. Africa.

Descriptions

Boraginaceae, B. Verdcourt. Flora of Tropical East Africa. 1991

Morphology General Habit
Perennial herbs with single unbranched stems clothed with petiole remnants; rootstocks horizontal or subvertical
Morphology Leaves
Basal leaves broadly ovate to elliptic-lanceolate, long-petiolate; cauline leaves elliptic to narrowly lanceolate the lower long-petiolate, the upper sessile
Morphology Reproductive morphology Flowers
Flowers in large ± lax branched panicles with reduced bracts or lower leaf-like, the individual cymes 8–15-flowered, simple or branched, pedunculate; pedicels elongating considerably in fruit
Morphology Reproductive morphology Flowers Calyx
Calyx divided nearly to the base into 5 equal lanceolate persistent but scarcely accrescent lobes
Morphology Reproductive morphology Flowers Corolla
Corolla white, sometimes tinged mauve or yellowish, campanulate or subrotate; lobes ovate, obtuse Throat-bosses exserted, trapeziform, oblong-triangular or semilunar, usually emarginate
Morphology Reproductive morphology Flowers Androecium Stamens
Filaments inserted in middle of corolla-tube, ± exserted; anthers almost medifixed, versatile
Morphology Reproductive morphology Flowers Nectaries
Nectary scales ±10 at base of corolla-tube, each with 2 divergent horns
Morphology Reproductive morphology Flowers Gynoecium Pistil
Ovary indistinctly 4-lobed; style filiform, ± equalling the stamens; stigma small, capitate
Morphology Reproductive morphology Fruits
Nutlets 1–4, all equal or one much exceeding the others, either wingless and densely glochidiate or with a broad cartilaginous ± undulate wing but lacking glochids.
[FTEA]

Sources

  • 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 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