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FIG. 4 in Floral anatomy of Pseudartabotrys Pellegrin (Annonaceae), a monospecific genus endemic to Gabon
No full textFIG. 4. — Ascending transverse sections of the flower of Pseudartabotrys letestui Pellegrin (continued): A, B, at the corolla insertion level; C, D, at the androecium insertion level. Scale bar: 1 mm.Published as part of Deroin, Thierry & Bidault, Ehoarn, 2017, Floral anatomy of Pseudartabotrys Pellegrin (Annonaceae), a monospecific genus endemic to Gabon, pp. 111-123 in Adansonia 39 (2) on page 116, DOI: 10.5252/a2017n2a2, http://zenodo.org/record/459907
Floral anatomy of <i>Pseudartabotrys</i> Pellegrin (Annonaceae), a monospecific genus endemic to Gabon
No full textDeroin, Thierry, Bidault, Ehoarn (2017): Floral anatomy of Pseudartabotrys Pellegrin (Annonaceae), a monospecific genus endemic to Gabon. Adansonia 39 (2): 111-123, DOI: 10.5252/a2017n2a
FIG. 5 in Novelties in Erythroxylum P.Browne (Erythroxylaceae) from the Comoros Archipelago: two new, range-restricted and threatened species, and notes on the Mount Choungi biogeographical singularity
No full textFIG. 5. — Distribution of Erythroxylum choungiense E.Bidault, Traclet & M.Pignal, sp. nov. (♦) and E. labatii E.Bidault & M.Pignal, sp. nov. (●) in the Comoros archipelago.Published as part of Bidault, Ehoarn, Traclet, Sébastien & Pignal, Marc, 2022, Novelties in Erythroxylum P.Browne (Erythroxylaceae) from the Comoros Archipelago: two new, range-restricted and threatened species, and notes on the Mount Choungi biogeographical singularity, pp. 215-228 in Adansonia (3) 44 (21) on page 226, DOI: 10.5252/adansonia2022v44a21, http://zenodo.org/record/705075
Fig. 3 in Novitates Gabonenses 90: Palisota (Commelinaceae) revisited: description of eight new species from Central Africa and notes on the identity of P. satabiei and P. bogneri
No full textFig. 3. – Distribution of Palisota akouangoui E. Bidault & Burg (squares) and P. repens E. Bidault & Burg (circles). Elevation is represented in levels of grey, and protected areas as shaded.Published as part of Bidault, Ehoarn & Burg, Willem Joost van der, 2019, Novitates Gabonenses 90: Palisota (Commelinaceae) revisited: description of eight new species from Central Africa and notes on the identity of P. satabiei and P. bogneri, pp. 169-202 in Candollea 74 (2) on page 180, DOI: 10.15553/c2019v742a7, http://zenodo.org/record/572471
FIG.1 in Une nouvelle espèce de Foetidia (Lecythidaceae, sous-famille Foetidioideae) en danger critique d'extinction récemment découverte à Mayotte, archipel des Comores
No full textFIG.1. — Foetidia comorensis Labat, Bidault & Viscardi, sp. nov.: A, rameau fleuri; B, fruit mature; C, sépale pétaloïde du fruit mature; D, détail du style et des bractéoles du réceptacle du fruit mature. Échelles: A, B, 1 cm; C, D, 0,5 cm. A, Viscardi & Guiot 219; B-D, Viscardi et al. 101. Dessin Marion Madeira.Published as part of Labat, Jean-Noël, Bidault, Ehoarn & Viscardi, Guillaume, 2011, Une nouvelle espèce de Foetidia (Lecythidaceae, sous-famille Foetidioideae) en danger critique d'extinction récemment découverte à Mayotte, archipel des Comores, pp. 263-269 in Adansonia (3) 33 (2) on page 265, DOI: 10.5252/a2011n2a11, http://zenodo.org/record/519775
FIG. 2 in Une nouvelle espèce de Foetidia (Lecythidaceae, sous-famille Foetidioideae) en danger critique d'extinction récemment découverte à Mayotte, archipel des Comores
No full textFIG. 2. — Foetidia comorensis Labat, Bidault & Viscardi, sp. nov.: A, bouton floral; B, fleur; C, rameau stérile avec jeunes feuilles; D, rameau fleuri; E, fruit avec sépales pétaloïdes sclérifiés et style persistant; F, réceptacle et bractéoles persistantes à la base, pédicelle. Photos G. Viscardi.Published as part of Labat, Jean-Noël, Bidault, Ehoarn & Viscardi, Guillaume, 2011, Une nouvelle espèce de Foetidia (Lecythidaceae, sous-famille Foetidioideae) en danger critique d'extinction récemment découverte à Mayotte, archipel des Comores, pp. 263-269 in Adansonia (3) 33 (2) on page 267, DOI: 10.5252/a2011n2a11, http://zenodo.org/record/519775
Fig. 2. – Palisota akouangoui E in Novitates Gabonenses 90: Palisota (Commelinaceae) revisited: description of eight new species from Central Africa and notes on the identity of P. satabiei and P. bogneri
No full textFig. 2. – Palisota akouangoui E. Bidault & Burg (A–C) and P. alboanthera Burg & E. Bidault (D–G). A. Entire plants showing infrutescences; B. Mature fruits, entire and opened, showing seeds; C. Inflorescence showing open flowers, with green lower stamen; D. Living plant with inflorescence; E. Young inflorescence with male flowers, showing erect, pale yellow lower stamen; F. Bisexual flower with reflexed, white lower stamen; G. Detail of swollen roots. [A– B: Bidault et al. 4100; C: Bidault et al. 3785; D–F: Bidault et al. 3807; G: Stévart et al. 4780] [Photos: E. Bidault]Published as part of Bidault, Ehoarn & Burg, Willem Joost van der, 2019, Novitates Gabonenses 90: Palisota (Commelinaceae) revisited: description of eight new species from Central Africa and notes on the identity of P. satabiei and P. bogneri, pp. 169-202 in Candollea 74 (2) on page 179, DOI: 10.15553/c2019v742a7, http://zenodo.org/record/572471
Fig. 13. – Palisota plicata E.Bidault & Burg. A in Novitates Gabonenses 90: Palisota (Commelinaceae) revisited: description of eight new species from Central Africa and notes on the identity of P. satabiei and P. bogneri
No full textFig. 13. – Palisota plicata E.Bidault & Burg. A. Habit; B. Inflorescence; C. Bisexual flower, side view; D. Sepal; E. Petal; F. Lower stamen; G. One upper stamen; H. Ovary and pistil; I. Staminode; J. Mature fruit; K. Immature fruit with exocarp removed, showing immature seeds; L. Sketches of leaf base variation. [A, D-J, L (right): Bidault et al. 3576; B-C, L (left): Bidault et al. 3561; K: Bidault et al. 3514] [Drawings: L. Longou]Published as part of Bidault, Ehoarn & Burg, Willem Joost van der, 2019, Novitates Gabonenses 90: Palisota (Commelinaceae) revisited: description of eight new species from Central Africa and notes on the identity of P. satabiei and P. bogneri, pp. 169-202 in Candollea 74 (2) on page 194, DOI: 10.15553/c2019v742a7, http://zenodo.org/record/572471
FIG. 1. — Erythroxylum choungiense E in Novelties in Erythroxylum P.Browne (Erythroxylaceae) from the Comoros Archipelago: two new, range-restricted and threatened species, and notes on the Mount Choungi biogeographical singularity
No full textFIG. 1. — Erythroxylum choungiense E.Bidault, Traclet & M.Pignal, sp. nov.: A, habit (dry); B, habit (fresh); C, detail of leaf venation; D, long-styled flower; E, shortstyled flower; F, short-style flower with corolla fallen; G, mature fruit; H, seed; A, C, D-F, Guiot 03 (MAO), B, G, H, no voucher. Drawings by Ludivine Longou. Scale bars: A, B, 2 cm; C, 3 mm; D, E, 1 mm; F, 2 mm; G, H, 1 mm.Published as part of Bidault, Ehoarn, Traclet, Sébastien & Pignal, Marc, 2022, Novelties in Erythroxylum P.Browne (Erythroxylaceae) from the Comoros Archipelago: two new, range-restricted and threatened species, and notes on the Mount Choungi biogeographical singularity, pp. 215-228 in Adansonia (3) 44 (21) on page 220, DOI: 10.5252/adansonia2022v44a21, http://zenodo.org/record/705075
Erythroxylum choungiense E. Bidault, Traclet & M. Pignal 2022, sp. nov.
No full text1. Erythroxylum choungiense E.Bidault, Traclet & M.Pignal , sp. nov. (Figs 1; 2) Ab aliis speciecibus Erythroxylorum Insulae Comorianae Madagascaraeque species nova facile differt conspicuis cordatis ad basem curvinervisque foliis (vs cuneata rectinervaque et angulos ad apicum). TYPUS. — Mayotte. Grande Terre, Kani-Kéli, Choungui, peu avant le sommet du Mont Choungui, 450 m, 12°57’25”S, 45°08’02”E, fl., fr., 30.XI.1997, J.-N. Labat & O. Pascal 2920 (holo-, P [P00080562]!; iso-, G, K, MAO [MAO00616]!, MO, WAG). PARATYPI. — Mayotte. Grande Terre, Chirongui, Choungui, Mlima Choungui, fl., 16.XI.1995, O . Pascal 209 (MAO [MAO01945]!; P [P00143108]!); fr., 29.XII.1995, O . Pascal 286 (MAO [MAO01948]!; P [P00143107]!); 593 m, fl., 17.VI.1996, O . Pascal 593 (MAO [MAO01944]!, P [P000780170]!); Réserve forestière de Choungui, fr., 28.XI.2002, F . Barthelat, F. Melki & B. Ali Sifari 1100 (MAO [MAO00618]!; P [P00339177, P00339178]!; K; MO); 18.XI.2002, F .Barthelat, P.Hoffman, H. Ralimanana. M. Mchangama & B. Ali Sifari 1084 (MAO [MAO00619]!; P [P00339195]!); 03.I.2004, F . Barthelat, G. Viscardi & N. Parras 1260 (MAO [MAO00620]!; P [P00437926]!). — Grande Terre, Kani-Kéli, Choungui, sommet du Mlima Choungui, 500-640 m, 12°57’52”S, 45°7’55”E, fr., 30.XII.2000, J.-N . Labat & F. Barthelat 3349 (MAO [MAO00617]!; P [P00209805]!); plateforme 2, fr., 09.IX.2014, V . Guiot 3 (MAO [MAO00433]!); au-dessus du sentier avant le plateau dans le sous-bois, 537 m, 12°57’26.30”S, 45°08’02.18”E, st., 02.I.2019, S . Traclet & A. Abdallah 591 (MAO [MAO02187]!; P [P000780169]!); plateforme (point de vue) du sentier qui monte au padza, 504 m, 12°57’27”S, 45°08’02”E, fr., 02.I.2019, S . Traclet & A. Abdallah 593 (MAO [MAO02189]!; P [P000780168]!); 06.II.2019, S . Traclet 651 (MAO [MAO02283]!; MO; P [P01069781]!); dans les pentes ouest avant de traverser le padza à fougères, 538 m, 12°57’25”S, 45°08’01”E, fr., 02.I.2019, S . Traclet & A. Abdallah 598 (MAO [MAO02194]!; P [P000780167]!); pente à l’ouest du sentier montant au sommet, 533 m, 12°57’26”S, 45°08’02”E, fr., 06.II.2019, S . Traclet 640 (MAO [MAO02272]; P [P000780166]!); 524 m, 12°57’26.20”S, 45°08’01.38”E, fr., 06.II.2019, S . Traclet 645 (MAO [MAO02277]!; P [P000780165]!); 512 m, 12°57’27”S, 45°08’01”E, fr., 06.II.2019, S . Traclet 652 (G; MAO [MAO02284]!; P [P01069782]!); 468 m, 12°57’28.87”S, 45°08’00.79”E, fr., 06.II.2019, S . Traclet 653 (MAO [MAO02287]!; P [P01069783]). ETYMOLOGY. — The specific epithet refers to Mlima (Mount) Choungi, to which the species is endemic. HABITAT AND DISTRIBUTION. — Erythroxylum choungiense sp. nov. is restricted to submontane nepheliphilous shrubland with Buxus madagascarica Baill. and Olea capensis subsp. macrocarpa (C.H.Wright) Verd. (Boullet 2005; Fadul 2011), where it occurs locally in a south-southwest oriented ravine, along with Eugenia choungiensis Byng & N.Snow, Cynometra mayottensis Labat & O.Pascal, Cassipourea ovata Tul., Chionanthus cordifolius Labat, Pignal & O.Pascal, et Securinega durissima J.F.Gmel. This species is only known from Mayotte island, at altitudes between 470 and 580 m. Only a single locality is known, near the top of Mount Choungi. PHENOLOGY. — Flowering material has been collected in June (Pascal 593) and from November to December. Fructification starts at the end of November and extends through February, with a peak of fruit maturation at the end of January. CONSERVATION STATUS. — Erythroxylum choungiense sp. nov. is endemic to Mayotte and known from 17 collections made between 1995 and 2019, only 10 of which provide precise geographical coordinates, although all of them came from the same area on Mount Choungi. These collections represent a single extant subpopulation, and while the total number of individuals has not been counted, the population size is estimated to exceed 50 individuals. Using a 2 × 2 km cell size, the AOO of this species is estimated to be 4 km 2, below the upper threshold for “Critically Endangered” status under Red List Criterion B2. Calculation of the EOO would yield a lower value than the AOO, so the EOO is therefore calculated to the AOO (4 km 2), below the upper threshold for “Critically Endangered” status under Criterion B1. All occurrences are located within the recently created National Natural Reserve No. 328 (Réserve Naturelle Nationale des Forêts de Mayotte). The single subpopulation is nevertheless threatened by touristic activities, including uncontrolled hiking to the summit of Mount Choungi, which induces a decline in the quality of the habitat of this species. As a consequence, the 10 occurrences represent a single location (sensu IUCN 2012; IUCN Standards and Petitions Committee 2019) with respect to the most serious plausible threat (touristic activities). Based on this threat, we infer a past, current and a future continuing decline in the extent and the quality of its habitat. This species is thus assessed as Critically Endangered [CR B1ab(iii)+2ab(iii)]. DESCRIPTION Shrub to 3 m tall, densely branched, with numerous short branches. Branches 2-5 mm in diameter, arranged alternately, silver-brown, finely striated; branches vinous when young, with numerous, elongated, yellowish lenticels 0.8-1.8 mm long; internodes 2-24 mm long on short branches. Cataphylls scarce, restricted to the youngest portion of stems, usually by 2(or 3) in the 1-2.5 cm portion of stem above each leaf, triangular, symmetrical, 1.8-2.2 × 2-2.4 mm, with two conspicuous longitudinal straight wings and a third wing between the two others, only visible in the apical half. Stipules caducous, often present on youngest leaves, 2-2.5 × 2- 1.2 mm, triangular, asymmetrical, the longest margin to 2 mm, the shortest to 1.2 mm, apex joining the opposite stipule, base thickened, keel winged, straight, margins entire. Petiole 1.5-2.5 × 0.7-1 mm, subterete. Leaf blade (28-)45-60(-85) × (14-)22-29(-42) mm, chartaceous, usually ovate to elliptic, rarely obovate, base cordate, margins slightly revolute, apex acuminate, acumen rounded, 1-3 mm long, blade red when immature, discolorous when mature, medium-green (silver-green when dry) adaxially, light green (light brown to ochre when dry) abaxially, the midrib lighter green to yellow (prominent when dry) adaxially, prominent abaxially, 8-11 secondary veins per side, regularly arched, most evident on lower leaf surface. Inflorescences comprising 1- to 4-flowered fascicles borne in the axils of cataphylls; bracteoles 3-4, c. 1.2 mm long, triangular, concave. Flowers borne on a pedicel 10-13 mm long. Calyx: 2-3.5 mm high, 4-7 mm wide; lobes 5, 2-2.5 × 1.5-1.8 mm, triangular to rounded, apex acuminate, united for about one fourth of their length. Petals white, oblong, 4.5-5 × 2-2.5 mm, slightly recurved at anthesis, finely striated; ligule 1.5-2 mm, oriented towards the center of the flower, margin undulate, 2-lobed, the lobes triangular. Staminal cup smaller than calyx, margin entire. Short-styled flowers: stamens white subequal, 5.5-6 mm long; anthers 0.7 × 0.7 mm, suborbicular; styles 3, 3-3.2 mm long, free. Long-styled flowers: stamens white, unequal, antisepalous filaments 3.8-4 mm long; antipetalous filaments 3-3.5 mm long; anthers 0.7 × 0.7 mm, suborbicular; styles 3, 5.5-6 mm long, free. Fruit a drupe, green to orange with longitudinal red lines to red, 9-12 × 6-9 mm when mature, ovoid, pointed at apex, surface smooth; pedicel 11-16 mm long. Seed similar in shape, 7-10 × 5-6 mm when mature, finely striated longitudinally.Published as part of Bidault, Ehoarn, Traclet, Sébastien & Pignal, Marc, 2022, Novelties in Erythroxylum P. Browne (Erythroxylaceae) from the Comoros Archipelago: two new, range-restricted and threatened species, and notes on the Mount Choungi biogeographical singularity, pp. 215-228 in Adansonia (3) (3) 44 (21) on pages 219-222, DOI: 10.5252/adansonia2022v44a21, http://zenodo.org/record/705075
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