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This species is accepted, and its native range is E. & S. Ethiopia to N. Kenya, S. Arabian Peninsula.
A specimen from Kew's Herbarium

[FTEA]

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

Type
Type: Ethiopia, Adda Galla, James & Thrupp s.n. (K!, holo.)
Morphology General Habit
Erect or straggling shrubby herb or shrub to 1 m tall; young stems densely whitish pubescent to tomentellous with many-rayed stellate hairs, often also with dense glandular hairs and rarely with long thin pilose hairs
Morphology Leaves
Leaves with petiole 0.5–2(–3) cm long; lamina ovate to broadly cordiform or reniform, largest 1.7–6 × 1.5–5 cm, apex subacute to broadly rounded, base truncate to cordate, densely whitish stellatepubescent to tomentellous beneath, sparser above
Morphology Reproductive morphology Flowers
Flowers solitary (or with two flowers on distinct pedicels), axillary; pedicels 2–25(–35) mm long; bracteoles foliaceous, 6–15 × 4–12 mm
Morphology Reproductive morphology Flowers Calyx
Calyx 13–25 mm long, divided to 2–3 mm from base, stellate-tomentellous and often also with stalked glands; lobes, linear, acute. Corolla opening in the evening, fallen by early morning, white (rarely with a faint purple tinge); tube 4–8 cm long of which the basal cylindric part 3–6 cm and the throat 1–3 cm long; lobes 8–13 × 7–14 mm, broadly triangular-reniform with wavy margin and rounded apex
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens didynamous; filaments fused for 2–3 mm at base, free parts 4–6 and 7–9 mm long, glabrous or longer pair with a few hairs; anthers 3–5 mm long
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary densely pubescent.
Morphology Reproductive morphology Flowers Gynoecium Stigma
Ventral stigma lobe 1.5–2.5 × ± 0.5 mm, dorsal ± 0.5 mm long
Morphology Reproductive morphology Fruits
Capsule strongly clavate, pubescent all over with non-glandular hairs, 18–22 mm long, 6-seeded
Morphology Reproductive morphology Seeds
Seed orbicular, dark grey, ± 6 × 6 mm.
Ecology
Acacia-Commiphora woodland and bushland with Sterculia and Terminalia on rocky limestone hills; 400–600 m
Distribution
Range: Ethiopia, Somalia; Saudi Arabia, Yemen Flora districts: K1

[FSOM]

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

Type
ype: N1, “Adda Galla”, James & Thrupp s.n. (K holo.).
Morphology General Habit
Shrub 0.2–2 m tall
Morphology General Indumentum
Young stems, leaves, bracts and calyces whitish-lanate with many-armed stellate hairs up to c. 0.3 mm long, sometimes also with up to 1.5–4 mm long simple hairs and c. 0.3–0.5 mm long glandular hairs
Morphology Leaves
Leaf-blades ovate to orbicular, up to 15–60 x 14–45 mm, with veins branching mostly from the base, apex obtuse, base shortly attenuate to cordate; petiole up to 7–22 mm long
Morphology Reproductive morphology Flowers
Flowers single or few together at upper nodes on peduncles up to c. 4–9 mm long; bracteoles leaf-like, up to 4–12 x 4–8 mm with petiole up to c. 3–7 mm long, much enlarged in fruit
Morphology Reproductive morphology Flowers Calyx
Calyx-lobes linear with obtuse apex, up to 10–19 x 2 mm, somewhat enlarged in fruit
Morphology Reproductive morphology Flowers Corolla
Corolla white, at least up to c. 50–80 mm long and 25–40 mm across; tube cylindrical, up to 40–60 mm long; lobes free for c. 11–18 mm
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers c. 3 mm long
Morphology Reproductive morphology Fruits
Capsule c. 8–12-seeded, up to 14–21 x 7–8.5 mm, densely pubescent with c. 0.3 mm long spreading simple hairs interspersed with some few-armed stellate hairs.
Distribution
N1–3; C1, 2; S1, 2; Ethiopia, Kenya, Yemen, Oman
Ecology
Altitude range 100–1440 m.
Vernacular
Habo ad, sonah (Somali).
Note
Similar to R. fiorii Chiov. in Eritrea and Ethiopia, which differs in having stems with a dense whitish indumentum of up to 4 mm long patent hairs and leaves with an indumentum of simple hairs. Some collections from northern Somali, such as Newbould 730 from N2, approach R. fiorii in having long patent hairs on the stems, but still have stellate hairs on the leaves as in typical R. discifolia. Phenology Flowers at night.

Native to:

Ethiopia, Kenya, Oman, Somalia, Yemen

Ruellia discifolia Oliv. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
James [s.n.], Somalia K000393974

First published in Hooker's Icon. Pl. 16: t. 1511 (1886)

Accepted by

  • Ghazanfar, S.A. (1992). An Annotated Catalogue of the Vascular Plants of Oman and their Vernacular names Scripta Botanica Belgica 2: 1-153.
  • 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.
  • Mosti, S., Raffaelli, M. & Tardelli, M. (2012). Contributions to the flora of central-southern Dhofar (Sultanate of Oman) Webbia; Raccolta de Scritti Botanici 67: 65-91.
  • Patzelt, A., Harrison, T., Knees, S.G. & Hartley, L.A. (2014). Studies in the flora of Arabia: XXXI. New records from the Sultanate of Oman Edinburgh Journal of Botany 71: 161-180.
  • Thulin, M. (ed.) (2006). Flora of Somalia 3: 1-626. The Royal Botanic Gardens, Kew.
  • Vollesen, K. (2008). Flora of Tropical East Africa, Acanthaceae(1): 1-285.

Literature

Kew Backbone Distributions

  • Mosti, S., Raffaelli, M. & Tardelli, M. (2012). Contributions to the flora of central-southern Dhofar (Sultanate of Oman) Webbia; Raccolta de Scritti Botanici 67: 65-91.
  • Thulin, M. (ed.) (2006). Flora of Somalia 3: 1-626. The Royal Botanic Gardens, Kew.

Flora of Somalia

  • Flora Somalia, (2000) Author: by M. Hedrén [updated by M. Thulin 2008]

Flora of Tropical East Africa

  • Chiovenda, Fl. Somala: 248 (1929)
  • E.P.A.: 937 (1964)
  • F.E.E. 5: 388 (2006)
  • F.T.A. 5: 47 (1899)
  • Fl. Somalia 3: 393 (2006).
  • Hooker, Ic. Pl., ser. 3, 6: t. 1511 (1886)
  • James, Unknown Horn Afr.: 321, t.2 (1888)
  • Kuchar, Pl. Somalia (CRDP Techn. Rep. Ser., no. 16): 250 (1986)
  • Lebrun & Stork, Enum. Pl. Afr. Trop. 4: 501 (1997)

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

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