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

[FWTA]

Scrophulariaceae, F. N. Hepper. Flora of West Tropical Africa 2. 1963

Morphology General Habit
Slender erect herb 11-16 ins. high, sparingly branched, similar in habit to the last (Craterostigma schweinfurthii)
Morphology Reproductive morphology Flowers
Small blue flowers with yellow hairs on the lower lip
Ecology
In marshes.

[FZ]

Scrophulariaceae, D. Philcox. Flora Zambesiaca 8:2. 1990

Morphology General Habit
Erect, slender annual or perennial herb, 5–20(35) mm. tall; stems quadrangular, simple or branched, subglabrous above becoming densely to subdensely minutely white pilose below.
Morphology Leaves
Leaves opposite, 2–8 cauline pairs, 2–10(16) x 0.5–2(4.5) mm., ovate-lanceolate, obtuse, subcuneate at base, glabrous, margin somewhat thickened especially towards apex, shortly hispid-ciliate, minutely glandular-punctate.
Morphology Reproductive morphology Flowers
Flowers few, terminal, in axils of alternate, bract-like, reduced leaves, appearing subcapitate, shortly pedicellate.
Morphology Reproductive morphology Flowers Pedicel
Pedicels c. 1 mm. long or less.
Morphology Reproductive morphology Inflorescences Bracts
Bracts 3–6 mm. long, 1–2 mm. wide, ovate-lanceolate, pilose.
Morphology Reproductive morphology Flowers Calyx
Calyx 2.2–6 mm. long, shortly stipitate-glandular or white pilose to subglabrous, 5-nerved with nerves occasionally shallowly raised or slightly winged; lobes 0.8–1.5 mm. long, deltate at base, acuminate, shortly ciliolate, markedly shorter than tube.
Morphology Reproductive morphology Flowers Corolla
Corolla purple or violet with white markings, 7–10.5 mm. long, upper lip subtruncate, obscurely, shallowly emarginate, glabrous without; lower lip trilobed, lobes rounded.
Morphology Reproductive morphology Flowers Androecium Stamens Filaments
Anterior filaments 2–3 mm. long with appendage at base c. 1 mm. long, clavate with globular head, papillose c. 0.35 mm. in diam.
Morphology Reproductive morphology Fruits
Capsule up to 3.25 x 1.5 mm., broadly ellipsoid-ovoid.

[FTEA]

Scrophulariaceae, S.A. Ghazanfar, F.N. Hepper & D. Philcox. Flora of Tropical East Africa. 2008

Type
Type: Cameroon, Garoua near Tchambutu, Ledermann 5047 (B†, holo.; K!, photo.)
Morphology General Habit
Erect annual herb, (6–)25–40 cm high.
Morphology Stem
Stems suffused purple, simple or usually branched in upper part, quadrangular, glabrous
Morphology Leaves
Leaves linear to lanceolate, 3–19 mm long, 2–7 mm wide, sessile, apex acute, margins ± serrate, scabrid-ciliate on the margins, 1–3-veined
Morphology Reproductive morphology Flowers
Flowers terminating each branch, few together or shortly spicate, almost sessile
Morphology Reproductive morphology Inflorescences Bracts
Bracts lanceolate
Morphology Reproductive morphology Flowers Calyx
Calyx 5 mm long with 5 wide purple longitudinal bands, teeth triangular, acute, scabrid
Morphology Reproductive morphology Flowers Corolla
Corolla 5–7 mm long, lower lip 3-lobed, violet with a whitish spot in middle and two yellow marks in throat, upper lip deep mauve.
Morphology Reproductive morphology Flowers Androecium Stamens Anthers
Anthers bluish, pollen white
Morphology Reproductive morphology Fruits
Capsule oblong, 5 mm long, acute
Morphology Reproductive morphology Seeds
Seeds suborbicular, grooved down one side.
Ecology
Moist soil on rock outcrops; ± 1000 m
Conservation
Least Concern (LC), but in the Flora area known from a single gathering that was collected in 1956
Note
The Zambia specimens have pubescent angles of the stems, and the flowers are conspicuously pubescent in a capitate inflorescence. If Raynal (l.c.) is correct in including C. guineese Hepper (K.B. 14: 407 (1960)) in the synonymy, the distribution would extend to Guinea Republic, Guinea Bissau and Senegal, but I still consider it to be a distinct species.
Distribution
Flora districts: T8 Range: Cameroon, Zambia

[FTEA]
Use
None recorded on specimens from our area

Native to:

Cameroon, Chad, Guinea, Guinea-Bissau, Mali, Senegal, Tanzania, Zambia, Zaïre

Crepidorhopalon gracilis (Pilg.) Eb.Fisch. appears in other Kew resources:

Date Reference Identified As Barcode Type Status
Jan 1, 1960 Guinea-Bissau Craterostigma guineense K000405184 holotype
Jan 1, 1960 Guinea-Bissau Craterostigma guineense K000405181 holotype
Guinea-Bissau Craterostigma guineense K000405182
Guinea-Bissau Craterostigma guineense K000405183 holotype
Jun 24, 1966 Ledermann [5047], Cameroon Craterostigma gracile K000405178 Unknown type material

First published in Feddes Repert. 100: 443 (1989)

Accepted by

  • Catarino, L., Sampaio Martins, E., Pinto-Basto, M.F. & Diniz, M.A. (2006). Plantas Vasculares e Briófitos da Guiné-Bissau: 1-298. Instituto de investigação científica tropical, Instituto Português de apoio ao desenvolvimento.
  • Fischer, E. (1999). Flore d'Afrique Centrale (Zaire-rwanda-Burundi), Scrophulariaceae: 1-217. Jardin Botanique National de Belgique.
  • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne.
  • Lisowski, S. (2009). Flore (Angiospermes) de la République de Guinée Scripta Botanica Belgica 41: 1-517.

Literature

Kew Backbone Distributions

  • Brundu, G. & Camarda, I. (2013). The Flora of Chad: a checklist and brief analysis PhytoKeys 23: 1-18.

Flora Zambesiaca
Flora Zambesiaca
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

Flora of West Tropical Africa
Flora of West Tropical 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