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This species is accepted, and its native range is Rwanda to NW. & W. Tanzania.

[FTEA]

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

Type
Type: Rwanda, Bihembe to Kanjanampa, Braun 5549 (B†, holo.)
Morphology General Habit
Erect to scrambling perennial herb to 1 m tall, with a strong smell of mint; stems distinctly quadrangular, sparsely puberulous or sericeous-puberulous and with broad bands of long pilose hairs at nodes Perennial herb, 1 m tall; stems rounded, sparsely puberulous and with long pilose hairs above nodes
Morphology Leaves
Leaves with petiole distinct, up to 14 cm long; lamina cordiform, largest 10–16 × 8–12 cm, margin grossly and irregularly dentate, apex acute, base subcordate or cordate, often unequal, beneath glabrous but for scattered hairs on veins, above with uniformly scattered broad glossy hairs Leaves with petiole distinct, up to 5.5 cm long, with long pilose hairs and capitate glands; lamina cordiform, largest ± 13 × 10 cm, margin grossly and irregularly dentate, apex subacuminate, base cordate, on both sides with scattered broad glossy hairs, beneath also with scattered stalked capitate glands
Morphology Reproductive morphology Inflorescences
Panicle very lax, pyramidal, 5–20 cm long and wide, sticky; axes, peduncles and pedicels glandularpubescent; dichasia many-flowered at base of panicle, gradually fewer upwards; peduncles 1–4 cm long; pedicels 0.5–3 mm long; bracteoles up to 15 mm long Panicle very lax, pyramidal, 8–10 × 10–12 cm; axes, peduncles and pedicels densely glandular-puberulous; dichasia many-flowered at base of panicle, fewer upwards; peduncles 2.5–3.5 cm long; pedicels ± 0.5 mm long; bracteoles up to 12 mm long, linear-oblanceolate
Morphology Reproductive morphology Flowers Calyx
Calyx 16–26 mm long of which the fused basal part 1–2 mm, glandular-pubescent; lobes linear, over 1 mm wide near apex, parallel-sided or very slightly spathulate, rounded Calyx densely glandular-pubescent, 13–18 mm long of which the fused basal part ± 1 mm; lobes filiform to oblinear, under 0.5 mm wide near apex, parallel-sided or very slightly spathulate, rounded
Morphology Reproductive morphology Flowers Corolla
Corolla pale blue or blue, central part of lower lip dark blue, orange in throat, setae few, 40–55 mm long, cylindric tube 12–17 mm long, throat 12–16 mm long and 10–12 mm across in dried state, middle lobe in lower lip ovate-triangular, lateral elliptic, rounded, all 15–20 × 7–8 mm, lobes in upper lip elliptic, rounded, 15–22 × 7–8 mm Corolla white, tinged pale mauve outside and central part of lower lip mauve, setae numerous, ± 3 cm long, cylindric tube ± 8 mm long, throat ± 5 mm long and ± 5 mm across in dried state, middle lobe in lower lip ovate-triangular, lateral elliptic, rounded, all ± 13 × 5 mm, lobes in upper lip elliptic, rounded, ± 10 × 5 mm. Free part of filaments ± 11 and 12 mm long, fused for ± 7 mm at base, all with scattered hairs and glands along their whole length; anthers narrowly ellipsoid, 4–5 mm long, hairy and with capitate glands on connective, spurs ± 0.5 mm long
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Free part of filaments 13–15 and 15–17 mm long, fused for ± 5 mm at base, two long hairy along their whole length, two short glabrous; anthers oblong, 4–6 mm long, shorter glabrous, longer glandular and with short hairs near apex, spurs 1–1.5 mm long
Morphology Reproductive morphology Flowers Gynoecium Stigma
Stigma 4–5 mm long Stigma ± 2 mm long
Morphology Reproductive morphology Fruits
Capsule 15–22 mm long, with a few glands near apex Capsule and seed not seen.
Morphology Reproductive morphology Seeds
Seed oblong, 2–2.5 × 2 mm.
Ecology
Semi-evergreen lowland forest; 700 m In rock crevice in riverine forest, riverine scrub in woodland; 900–1300 m
Note
Known only from one incomplete collection. Seems to be closest to M. menthiodora from NW Tanzania. The open inflorescence is also reminiscent of M. nyassana, a woodland species from Zambia and Malawi not yet recorded from the Flora area. This has an eglandular inflorescence with much larger flowers. No type material has been traced and the identity of this species is therefore by no means certain, but the material seen fits the original description in all important respects. Lindau (l.c.) cited the type locality as being in Bukoba District in Tanzania, but it is clearly inside present day Rwanda. This no doubt led Brenan & Greenway (l.c.) to include the species without having seen any material, and probably also accounts for the species being omitted by Champluvier in Fl. Rwanda 3 (1985).
Distribution
Flora districts: T8 Range: Rwanda Range: Not known elsewhere Flora districts: T1 T4

Native to:

Rwanda, Tanzania

Mellera menthiodora Lindau appears in other Kew resources:

Date Reference Identified As Barcode Type Status
May 1, 2007 Mwangoka, M.A. [4261], Tanzania K000438395

First published in Bot. Jahrb. Syst. 57: 20 (1920)

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

  • E.J. 57: 20 (1920)
  • Lebrun & Stork, Enum. Pl. Afr. Trop. 4: 494 (1997).
  • T.T.C.L.: 13 (1949)

Flora of Tropical East Africa
Flora of Tropical East Africa
http://creativecommons.org/licenses/by-nc-sa/3.0

Herbarium Catalogue Specimens

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