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This species is accepted, and its native range is NW. Gabon.
A specimen from Kew's Herbarium

[KBu]

Darbyshire, I., Kiel, C.A., Daniel, T.F. et al. (2019). Two new genera of Acanthaceae from tropical Africa. Kew Bulletin 74: 39. https://doi.org/10.1007/s12225-019-9828-z

Conservation
This species is clearly scarce, being known with certainty fromonly four herbarium collections, despite Gabon being one of the best explored countries botanically in Africa according to Sosef et al. (2017). It appears to have a highly restricted range with an EOO of 2890 km2 based on current knowledge. Of the four known localities, Ndjolé is an area of gold and manganese mining (https://mining-atlas.com/project/Ndjole-Mangenese-Gold-Mine-Project.php) and the footprint of this mining activity along the Ogooué River is clearly visible on Google Earth™ imagery (accessed 15th August 2018). This is likely to have impacted upon habitat suitable for this species. There is still extensive intact forest habitat elsewhere within its range, and this species is likely to occur at other localities within this small range. However, based on current knowledge, with an EOO of less than 5000 km2,fewer than five locations and an inferred decline in extent and quality of habitat due to mining activities, this species is provisionally assessed as Endangered - EN B1ab(iii).
Distribution
Gabon (Estuaire, Moyen-Ogooué and Woleu-Ntem Provinces).
Ecology
This species is recorded from primary wet forest, shaded river margins and in alluvial silts by streams; the elevation range is estimated at 10 – 630 m.
Morphology General Habit
Perennial herb or subshrub, 70 – 180 cm tall, basal stems trailing and rooting at nodes, decumbent; young stems somewhat 6-angular, ± evenly pubescent with sparse antrorse to appressed eglandular trichomes and with opposite lines of denser trichomes, older internodes glabrescent
Morphology Leaves
Leaves petiolate, petioles to 70 mm long, furrowed above, antrorse-puberulous; blade ± concolorous, green or dark glaucous-green, elliptic, oblong-elliptic or ovate-elliptic, 8.5 – 15.5 × 3.6 – 8 cm (length : width ratio (1.75 –) 2.1 – 2.8 : 1), base rounded, shallowly cordate or obtuse, can be somewhat asymmetric, margin entire or irregularly undulate, apex acuminate, surfaces sparsely pubescent on main veins, with antrorse eglandular trichomes; cystoliths linear, numerous and conspicuous on both surfaces when dry, surfaces also with numerous minute red-brown sessile glands; lateral veins 6 – 8 pairs, brochidodromous, pale and prominent beneath
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 2; filaments ± 4 mm long (fide Heine 1966), glabrous; anthers with thecae unequally inserted, overlapping by 0.8 – 0.9 mm, thecae narrowly elliptic, 1.3 – 1.6 mm long, with multicellular eglandular trichomes along the exposed side more numerous on upper theca, and both with a flattened, broad appendage at base below suture with irregularly toothed fringe
Morphology Reproductive morphology Flowers Calyx
Calyx purple or grey-purple in live state at least towards base and apex, drying brown, divided almost to base into five subequal to ± unequal linear-lanceolate lobes resembling the bracteoles, 7.5 – 11 mm long, puberulent externally with mixed erect glandular and eglandular trichomes to 0.05 mm long
Morphology Reproductive morphology Flowers Corolla
Corolla ± 11 – 14 mm long, yellow with dark purple stripes on upper lip and dark purple speckling on lower lip, pubescent externally with erect eglandular trichomes; tube ± 6 – 8 mm long, cylindrical; limb bilabiate with lips ± 5.5 – 6 mm; upper lip hooded, apex shortly bilobed; lower lip pendant, shortly 3-lobed
Morphology Reproductive morphology Flowers Disc
Floral disk annular, ± 0.5 mm tall
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary ± 2 mm long, glabrous; style ± 11 mm long (fide Heine 1966), with eglandular trichomes towards base; stigma shortly bilobed
Morphology Reproductive morphology Flowers Pollen
Pollen not seen (see note)
Morphology Reproductive morphology Inflorescences
Inflorescence a slender erect terminal spike to 15 – 24.5 cm long including peduncle to 0.5 – 1.2 (– 3) cm long, comprising a series of opposite 1 – 3 (potentially more)-flowered cymes, those at base of spikes borne on peduncles to 2.5 mm long, those in distal portion of spike sessile or peduncle to 0.5 mm; rachis ± evenly pubescent with antrorse eglandular trichomes like those of young stems; bracts opposite, green, linear-lanceolate, 6 – 8 mm × c. 1 mm, pubescent abaxially, like rachis; bracteoles similar to bracts in shape and size but can have a more puberulent indumentum and can be purplish (drying brown); pedicels to 1.5 (– 2.5) mm long, puberulent
Note
Heine (1966) notes the presence of “sterile floral buds” in this species — these are presumably cleistogamous flowers, which are not uncommon in some genera of Acanthaceae, for example in Isoglossa (Darbyshire et al. 2012). Asystasia lindauiana Hutchinson & Dalziel (1931: 257) could potentially be confused with Champluviera on morphological grounds and has a sympatric distribution, hence is worthy of mention here. The two are superficially very similar both in vegetative characters and inflorescence form, sharing a terminal many-flowered spiciform thyrse. Indeed, Clarke (1900b) remarked on this close superficial similarity when describing Chlamydocardia nuda. However, A. lindauiana is easily separated from Champluviera in having four stamens (a character shared by all species of Asystasia), and in the anthers having thecae markedly offset and lacking basal appendages. Molecular evidence confirms that these genera are not closely related, with Asystasia falling within the “Pseuderanthemum lineage” of Justicieae (McDade et al. 2000).
Phenology
Phenology information on this species is very limited; three of the four flowering specimens seen by the current authors were collected in June or July, during the short dry season; the fourth was collected in January during the wet season.
Type
Gabon, Mabam, Como R., 60 miles from Gaboon, fl. 13 July 1896, Bates 494 (K! [K000419168] holotype; BM! [BM000931152], L* [L0003054], P! [P00540805] isotypes).

Native to:

Gabon

Champluviera nuda (C.B.Clarke) I.Darbysh. & T.F.Daniel appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Bates, G.L. [494], Gabon Justicia tigrina K000419168 holotype

First published in Kew Bull. 74(3)-39: 12 (2019)

Accepted by

  • Govaerts, R., Nic Lughadha, E., Black, N., Turner, R. & Paton, A. (2021). The World Checklist of Vascular Plants, a continuously updated resource for exploring global plant diversity. https://doi.org/10.1038/s41597-021-00997-6 Scientific Data 8: 215.

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Kew Backbone Distributions

  • Sosef, M.S.M. & al. (2006). Check-list des plantes vasculaires du Gabon Scripta Botanica Belgica 35: 1-438.

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 Bulletin
Kew Bulletin
http://creativecommons.org/licenses/by-nc-sa/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