Talbotiella batesii Baker f.

First published in J. Bot. 67: 197 (1929)
This species is accepted
The native range of this species is W. Central Tropical Africa. It is a tree and grows primarily in the wet tropical biome.

Descriptions

International Legume Database and Information Service

Conservation
Insufficiently known
Ecology
Africa: Guineo-Congolian forest.
Morphology General Habit
Perennial, Not climbing, Tree
[ILDIS]

Mackinder, B.A., Wieringa, J.J. & van der Burgt, X.M. 2010. A revision of the genus Talbotiella Baker f. (Caesalpinioideae: Leguminosae). Kew Bulletin 65: 401. DOI: https://doi.org/10.1007/s12225-010-9217-0

Type
Cameroon, Yaoundé, Bitye, Bates 1596 (holotype BM; isotypes BR, P).
Morphology General Habit
Tree 5 - 12 m, dbh 20 - 60 cm; bark smooth, pale grey, 6 mm thick
Morphology Twigs
Twigs glabrous or sparsely to moderately pubescent, hairs c. 0.5 mm long
Morphology General Buds
Bud scales 3 - 5, caducous; distichous, brown, coriaceous, not keeled, outer and inner surface glabrous, proximal scale orbicular, c. 1.5 mm diam., distal scales becoming progressively longer and relatively narrower, apical scale obovate, c. 7 x 4 mm, not keeled
Morphology Leaves Stipules
Stipules (seen in young foliage) in pairs, free, auriculate at base, the auricle suborbicular, c. 3x2 mm, with a single triangular lobe, c. 1.5 mm long, glabrous on both surfaces but margins ciliate, upper part of stipule narrowly lanceolate, 13 - 15 x 2 - 2.5 mm, outer surface pubescent along the midrib and margins, inner surface glabrous, apex acute
Morphology Leaves
Leaves alternate, paripinnate, 5.8 - 7 x 2 - 2.9 cm; petiole 1 - 2 mm long, leaf rachis 4.2 - 6.6 cm long, sparsely to moderately pubescent (most densely within the canal on the distal two-thirds of the rachis, often becoming glabrous in the proximal third), leaflets sessile, in 9 - 13 pairs, upper and middle leaflets opposite, lower 2 - 3 pairs sub-opposite, 10 - 15 x 1 - 3.5 mm, narrowly oblong, base asymmetric, proximal margin tapering towards apex, glabrous above, lower surface appearing glabrous with a hand lens but sparsely appressed puberulous under a microscope, fringing hairs c. 0.5 mm long, present particularly on the lower margins of young leaflets but absent in mature foliage; midvein central, prominent above and below for most of its length, becoming obscure just before the apex, a single small gland, not visible with a hand lens but visible under a microscope present on the distal half of the lower surface, positioned about midway between midvein and margin, always present on basal pair, often absent from upper pairs and not seen on the uppermost pair of leaflets
Morphology Reproductive morphology Inflorescences
Inflorescence a 10 - 18-flowered raceme, axis 2.5 - 4.5 cm long including a peduncle c. 2 mm long, light green, with a moderate to dense indumentum of golden patent hairs 1- 1.5 mm long; bud scales pale green; floral bracts obovate to spathulate, 7 - 10.5 x 1.5 - 3 mm, pale green to white, outer surface moderately pubescent, margins ciliate in upper half but often glabrous in lower half, inner surface glabrous; pedicels white, portion of pedicel below bracteoles 3 - 8.5 mm long, hairs up to 1 mm long; bracteoles opposite, linear to narrowly oblong, 6 - 8.5 x 1.1 - 2.5 mm, tapering towards the apex in upper third, white, glabrous or with a few scattered hairs outside, margins often ciliate; portion of pedicel above bracteoles 1 - 2 mm long, scattered spreading pubescence
Morphology Reproductive morphology Flowers Hypanthium
Hypanthium narrowly campanulate, white, 0.7 - 1.3 mm deep, outer surface with scattered hairs in the lower half, otherwise glabrous, inner surface glabrous
Morphology Reproductive morphology Flowers Calyx
Sepals 4, white, cucullate, outer surface glabrous, inner surface glabrous or with scattered erect hairs, 0.3 - 0.7 mm long around the base, apex with a tuft of ciliate hairs at the margins; adaxial sepal 4 - 5 x 3.5 - 4.5 mm, apex sometimes emarginate, with a tuft of hairs either side of the sinus, lateral and abaxial sepals 4 - 5.5 x 2.3 - 3.5 mm
Morphology Reproductive morphology Flowers Corolla
Petals absent (rarely a poorly developed linear petal present, 1 x 0.05 mm)
Morphology Reproductive morphology Flowers Androecium Stamens
Stamens 10 (- 12), filaments free, 5 - 9 mm long, white, glabrous or with some scattered hairs, anthers oblong-elliptic, c. 1 mm long, orange
Morphology Reproductive morphology Flowers Gynoecium Ovary
Ovary 1.5 - 3.5 x 1 - 1.3 mm, pale pink, white tomentose (golden when dry), on stipe 1 - 2 mm long, fused to the adaxial side of the hypanthium, free part of stipe very short, c. 0.3 mm long, velutinous, ovules 2 - 3, style 4 - 6 mm long, greenish white, glabrous except for some long hairs at the base, stigma capitate, pale yellow
Morphology Reproductive morphology Fruits
Pod compressed, 4.2 - 5.5 x 1.8 - 2.7 cm, triangular, broadest towards apex, upper suture slightly broadened, 3 - 4 mm wide, surfaces and suture moderately golden puberulous, beak 2 - 3 mm long; single developed seed c. 12 x 9 mm, discoid, testa deep reddish brown (Reitsma 3010)
Seedling
Seedling unknown.
Distribution
Cameroon, Gabon and Congo-Brazzaville.
Ecology
Inselberg, rocky outcrops or rocky plateaus, savanna-edge and river banks; 500 - 900 m.
Conservation
Using the criteria of IUCN (2001) we here assess this species as Critically Endangered (CR D) because it is known from only six mature individuals. However, these seven collections are from different localities spread over a circular range of approximately 350 km in diameter. We suspect that a concerted search in areas of suitable habitat (inselberg areas) between the known localities might result in the discovery of more individuals of Talbotiella batesii. However, since the habitat type of this species is quite rare, until such a search has been undertaken, we recommend an assessment of CR D.
Note
Named for the collector of the type, the American missionary, George Latimer Bates, who collected about two-thousand numbers in Cameroon, Equatorial Guinea and northern Gabon between 1895 - 1928 (Letouzey 1968, WAG database). At the outset of this study, Talbotiella batesii was known only from the type gathering from Cameroon. However, during the course of the work, the authors found six additional conspecific collections, one from Cameroon, four from Gabon and one from Congo-Brazzaville. An updated description of T. batesii has been prepared using all the collections.
[KBu]

IUCN Red List of Threatened Species https://www.iucnredlist.org/species/172492744/172492755

Conservation
VU - vulnerable
[IUCN]

Sources

  • Herbarium Catalogue Specimens

  • IUCN Categories

    • IUCN Red List of Threatened Species
    • http://creativecommons.org/licenses/by-nc-sa/3.0
  • International Legume Database and Information Service

    • International Legume Database and Information Service (ILDIS) V10.39 Nov 2011
    • http://creativecommons.org/licenses/by/3.0
  • Kew Backbone Distributions

    • The International Plant Names Index and World Checklist of Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 World Checklist of Vascular Plants. 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 Vascular Plants 2024. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2023 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0