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This species is accepted, and its native range is SW. Tanzania.

[FTEA]

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

Type
Type: Tanzania, Iringa District: Ruaha National Park, Mbage Camp, Richards 20950 (K!, holo.; EA!, K!, iso.)
Habit
Erect shrubby perennial herb to 60 cm tall with several stems from woody rootstock; young stems with sparse to dense spreading thin pilose hairs to 4 mm long and sparse to dense stalked capitate glands to 2 mm long
Leaves
Leaves with petiole 2.5–3.8 cm long; lamina ovate to cordiform, largest 6–9 × 4.5–6 cm, apex acute or narrowing into a weakly defined tip, base truncate to subcordate, sparsely pubescent, densest along veins
Flowers
Flowers solitary, axillary; pedicels 7–17 mm long; bracteoles foliaceous, 2–3 × 1–2.3 cm; petiole 5–10 mm long
Calyx
Calyx 32–38 mm long, divided to 2–3 mm from base, pilose with white glossy hairs and usually also with dense stalked capitate glands; lobes linear, 2–3.5 mm wide
Corolla
Corolla opening in the evening, fallen by early morning, pure white; tube 14–15 cm long of which the basal cylindric part 12.5–13.5 cm and the throat 1.5–2.5 cm long; lobes 2–2.5 × 2–2.8 cm, broadly ovate to reniform with broadly rounded apex
Stamens
Stamens exserted, slightly didynamous; filaments fused for ± 4 mm at base, free parts ± 10 and 11 mm long, all four hairy throughout; anthers ± 8 mm long
Ovary
Ovary not seen.
Stigma
Ventral stigma lobe ± 2 mm long, dorsal ± 0.5 mm long
Fruits
Capsule and seed not seen.
Ecology
Acacia-Commiphora-Combretum woodland and wooded grassland; 800–900 m
Note
I have only seen these three collections but Björnstad (l.c.) cites additional collections. Differs from R. bignoniiflora – which occurs both to the north and south – in the much larger flower parts. It might eventually be treated as a subspecies.
Distribution
Range: Not known elsewhere Flora districts: T7

Native to:

Tanzania

Ruellia richardsiae Vollesen appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jan 1, 2008 Richards, H.M. [20950], Tanzania K000780533 holotype
Jan 1, 2008 Richards, H.M. [20950], Tanzania K000780534 isotype

First published in Fl. Trop. E. Africa, Acanth.(1): 212 (2008)

Accepted by

  • Vollesen, K. (2008). Flora of Tropical East Africa, Acanthaceae(1): 1-285.

Literature

Kew Backbone Distributions

  • Vollesen, K. (2008). Flora of Tropical East Africa, Acanthaceae(1): 1-285.

Flora of Tropical East Africa
Flora of Tropical East Africa
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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.
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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