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This species is accepted, and its native range is SW. Ethiopia to NE. Tanzania.
A specimen from Kew's Herbarium

[FTEA]

Acanthaceae (part 2), Kaj Vollesen. Flora of Tropical East Africa. 2008

Type
Type: Kenya, Teita District: Teita, Voi River, Hildebrandt 2480 (BM!, holo.; K!, P!, iso.)
Morphology General Habit
Scandent or trailing shrubby herb to 2 m tall; young stems pubescent to pilose or sparsely so with shiny white hairs and with shorter glandular and non-glandular hairs
Morphology Leaves
Leaves with petiole 0.5–5.5 cm long; lamina ovate to cordiform, largest 4–8.5 × 2.5–6.5 cm, apex gradually or abruptly narrowed into an acute to acuminate tip, base truncate to cordate, puberulous to pubescent or sparsely so, densest along veins, and with scattered glands
Morphology Reproductive morphology Flowers
Flowers solitary or in 3-flowered axillary cymes; pedicels (peduncles in cymes) 8–20(–25) mm long; bracteoles (bracts in cymes) linear to slightly spathulate, caducous, 7–14 × ± 1 mm
Morphology Reproductive morphology Flowers Calyx
Calyx 22–26 mm long, divided to 2–3 mm from base, puberulous with glandular and non-glandular hairs and with scattered to dense longer pilose hairs; lobes filiform
Morphology Reproductive morphology Flowers Corolla
Corolla opening in the evening, fallen by early morning, pure white; tube 6.5–8.5 cm long of which the basal cylindric part 5.5–7.5 cm and the throat ± 1 cm long; lobes 13–17 × 12–18 mm, broadly ovatereniform with rounded apex
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens exserted, didynamous; filaments fused for 1–2 mm at base, free parts 6–9 and 9–12 mm long, glabrous; anthers 4–5 mm long
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary with dense short-stalked capitate glands.
Morphology Reproductive morphology Flowers Gynoecium Stigma
Ventral stigma lobe 1.5–2 × ± 0.5 mm, dorsal 0.5–1 mm long
Morphology Reproductive morphology Fruits
Capsule clavate, glandular-puberulous or sparsely so all over, 24–30 mm long, 6–8-seeded
Morphology Reproductive morphology Seeds
Seed oblong to orbicular, brown, 3.5–4 × 3–3.5 mm
Ecology
Undergrowth of evergreen lowland forest and riverine forest; 25–450 m (but clearly higher in NW Kenya).
Note
The Ethiopian material has much larger flowers than the East African material and should possibly be considered a distinct subspecies.
Distribution
Range: Ethiopia Flora districts: K1 K2 K7 T3

Native to:

Ethiopia, Kenya, Tanzania

Ruellia amabilis S.Moore appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Hildebrandt, J.M. [2480], Kenya K000393964 isotype

First published in J. Bot. 18: 7 (1880)

Accepted by

  • Hedberg, I., Kelbessa, E., Edwards, S., Demissew, S. & Persson, E. (eds.) (2006). Flora of Ethiopia and Eritrea 5: 1-690. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.
  • Vollesen, K. (2008). Flora of Tropical East Africa, Acanthaceae(1): 1-285.

Literature

Kew Backbone Distributions

  • Hedberg, I., Kelbessa, E., Edwards, S., Demissew, S. & Persson, E. (eds.) (2006). Flora of Ethiopia and Eritrea 5: 1-690. The National Herbarium, Addis Ababa University, Ethiopia & The Department of Systematic Botany, Upps.

Flora of Tropical East Africa

  • E. & P. Pf. IV, 3b: 309 (1895)
  • F.E.E. 5: 393 (2006).
  • F.T.A. 5: 47 (1899)
  • J.B. 18: 7 (1880)
  • Lebrun & Stork, Enum. Pl. Afr. Trop. 4: 501 (1997)
  • P.O.A. C: 368 (1895)

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/

Kew Backbone Distributions
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2021. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0