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This species is accepted, and its native range is Tanzania to Zambia.
A specimen from Kew's Herbarium

[FTEA]

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

Type
Type: Zambia, Urungu, Fwambo, Carson s.n. (K!, holo.)
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Free part of filaments 4–7 mm long, hairy throughout or glabrous upwards; anthers 1.5–2.5 mm long, spur 1/4–1/2 mm long. Free part of filaments 6–8 mm long, with a few hairs near base and glabrous upwards; anthers ± 3.5 mm long, spur ± 1/2 mm long. Upper stigma lobe well developed, about 1/2 the length of lower
Morphology Reproductive morphology Fruits
Capsule 11–13 mm long Capsule and seed not seen.
Morphology Reproductive morphology Seeds
Seed ± 3 mm long
Ecology
Burnt Brachystegia-Julbernardia woodland, burnt montane grassland, on sandy to loamy, clayey or gritty soil, appearing shortly after burning; 1200–2400 m Probably Acacia bushland; no altitude given
Note
D. tanganyikensis is closely related to D. trichocalyx subsp. verticillaris. The main differences are the pyrophytic habit, and the very fine puberulent indumentum without long non-glandular hairs on any part. The equally 5-toothed calyx, corolla shape and spurred anthers are typically Dyschoriste and the ovary clearly has more than 2 ovules. A very unusual species with characters unique in Dyschoriste, i.e. stiff retrorse hairs on the palate and a well-developed dorsal stigma lobe. These two characters would seem to point towards a relationship with the genera around Mellera, particularly Duosperma with which genus it also shares the greyish green colour. For the moment this species is best kept in Dyschoriste but further material is urgently required.
Morphology General Habit
Shrub; young branches conspicuously ridged, with scattered subsessile capitate glands, otherwise glabrous Viscid pyrophytic herb with several usually unbranched stems from large woody rootstock; stems erect (becoming decumbent in unburnt plants), 1–25 cm tall (up to 70 cm in Southern Africa), sparsely to densely glandular-puberulent and with nonglandular hairs (less than 0.5 mm long) intermixed
Morphology Leaves
Leaves drying greyish green; lamina broadly obovate, largest ± 5 × 3.5 cm, apex truncate to retuse with a recurved apical tooth, glabrous Leaves elliptic to obovate or narrowly so, 1–3 × 0.3–1 cm in flowering pyrophytic plants, up to 6 × 2 cm in mature plants, apex subacuminate to rounded with central triangular tooth, young leaves puberulent or sparsely so with capitate glands and non-glandular hairs or puberulent along veins only and without glands, mature leaves glabrous or with scattered hairs along midrib and on margins
Morphology Reproductive morphology Flowers
Flowers in 3–7-flowered condensed axillary cymes (often with several of the flowers aborting); peduncle and branches 1–3 mm long, with scattered subsessile capitate glands; outer bracts foliaceous, to 1.5 cm long, inner bracts and bracteoles lanceolate, up to 8 mm long, with scattered subsessile capitate glands Flowers solitary or in 3–7-flowered condensed axillary cymes (rarely two per axil); peduncle and branches up to 4 mm long, indumentum as stems or of glands only; outer bracts narrowly elliptic, up to 1(–2.5) cm long, or as inner bracts and bracteoles: linear-lanceolate, up to 8 mm long, glandular-puberulent
Morphology Reproductive morphology Flowers Calyx
Calyx with scattered subsessile capitate glands and sparsely ciliate teeth, ± 13 mm long; teeth ± 7 mm long Calyx sparsely to densely viscid glandular-puberulent, often with puberulent (less than 0.5 mm long) non-glandular hairs intermixed, 9–13(–15 in fruit) mm long; teeth 4–7(–8 in fruit) mm long, shorter than, same length or longer than tube
Morphology Reproductive morphology Flowers Corolla
Corolla nearly symmetrical (trumpet-shaped with bell-shaped throat expanded ventrally), no information on colour but probably mauve or purple, palate distinctly bullate between veins, with sparse short-stalked capitate glands and palate with long stiff retrorse hairs, ± 30 mm long of which the linear tube ± 10 mm, the throat ± 7 mm and the limb ± 13 mm long and ± 11 mm across apically; lobes oblong, erect in upper lip, spreading or deflexed in lower Corolla distinctly 2lipped, white with pale mauve to purple spots and lines on basal part of lower lip to mauve with purple spots, palate not or slightly bullate between veins, sparsely puberulent and with capitate glands, (19–)23–30 mm long of which the linear tube (7–)9–13 mm, the throat (5–)7–10 mm and the limb 7–9 mm, throat from 1–2 mm shorter to slightly longer than limb; lobes oblong, erect in upper lip, spreading or deflexed in lower
Distribution
Range: Congo-Kinshasa, Zambia, Malawi Flora districts: T1 T4 T7 Range: Not known elsewhere Flora districts: T2

Native to:

Malawi, Tanzania, Zambia, Zaïre

Dyschoriste tanganyikensis C.B.Clarke appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Nov 2, 1896 Carson, A. [s.n.], Zimbabwe K000393940 holotype
Bidgood, S. [5707], Tanzania K000468717

First published in D.Oliver & auct. suc. (eds.), Fl. Trop. Afr. 5: 77 (1899)

Accepted by

  • Govaerts, R. (2000). World Checklist of Seed Plants Database in ACCESS D: 1-30141.
  • Vollesen, K. (2008). Flora of Tropical East Africa, Acanthaceae(1): 1-285.
  • Vollesen, K. (2013). Flora Zambesiaca 8(5): 1-184. Royal Botanic Gardens, Kew.

Literature

Kew Backbone Distributions

  • Vollesen, K. (2013). Flora Zambesiaca 8(5): 1-184. Royal Botanic Gardens, Kew.

Flora of Tropical East Africa

  • Binns, Checklist Herb. Fl. Malawi: 13 (1968)
  • F.T.A. 5: 77 (1899)
  • Lebrun & Stork, Enum. Pl. Afr. Trop. 4: 480 (1997).
  • Richards & Morony, Checklist Mbala Distr.: 229 (1969)
  • Serengeti Res. Inst., Publ. 215: 25 (1976)

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