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

[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.)
Morphology General 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
Morphology 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
Morphology Reproductive morphology Flowers
Flowers solitary, axillary; pedicels 7–17 mm long; bracteoles foliaceous, 2–3 × 1–2.3 cm; petiole 5–10 mm long
Morphology Reproductive morphology Flowers 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
Morphology Reproductive morphology Flowers 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
Morphology Reproductive morphology Flowers Androecium 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
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary not seen.
Morphology Reproductive morphology Flowers Gynoecium Stigma
Ventral stigma lobe ± 2 mm long, dorsal ± 0.5 mm long
Morphology Reproductive morphology 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
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