Brachystegia utilis Hutch. & Burtt Davy

Species

Angiosperms > Fabales > Fabaceae > Brachystegia

Characteristics

Tree 6–15(–20) m. high; bark narrowly fissured and rather finely reticulate, grey at first, becoming rough and shedding slowly in rather thick scales, often brown to black in age; crown rounded or flattish, dense, bushy; mature foliage rather dark green.. Stipules free, subulate from a broader oblique base or falcate-subfoliaceous, 0.5–1.5 cm. long, usually caducous; auricle 0.. Leaves with 5–10(–12) subequal pairs of leaflets, the pairs contiguous or slightly spaced; petiole (2–)4–8(–10) mm. long; rhachis (4–)5–9(–12) cm. long, channelled, very narrowly winged, usually pubescent to tomentose with spreading hairs; stipels consisting of short semilunar expansions, closely below each pair of leaflets, or 0; leaflets mostly oblong to elliptic and rounded at both ends, (1–)2–4(–5) × 0.5–1.5(–1.8) cm., often retuse, sometimes mucronate, rarely narrowed at apex, asymmetric but rarely very oblique at base; midrib subcentral; basal fanwise nerves 2–3(–4); surfaces usually mat and concolorous, closely reticulate, densely pubescent to glabrous.. Panicles terminal or terminal and axillary, up to 5 × 5 cm., pubescent to tomentose (more so than the leaves) with spreading brown or rusty hairs.. Flowers small, greenish; bracteoles 4–5(–6) × 3–4 mm.. Tepals usually all sepaloid and broad, imbricate; outer 5(–6) subequal, up to 3 × 2 mm., free or with 2 or 3 partly connate, thin, margin usually translucent, glabrous or shortly and sparsely ciliate; inner 0 or 1, narrow or rudimentary.. Stamens ± 10; filaments free, 6–8 mm. long.. Ovary 2–3 × 1 mm., very densely crispate-setose; style 6–7 mm. long; stigma small.. Pod thinly woody, up to 12 × 3.5 cm. (usually seen much smaller), smooth, maturing yellowish or pinkish-brown, at first ± pruinose; sutural wings thin, normally spreading, each up to 4 mm. wide.. Fig. 35/10, p. 160.
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Leaves 5–13 cm long; petioles 2–8(10) mm long; rachis deeply canaliculate above with raised and winged margins; leaflets in 6–10 contiguous pairs, the middle pairs the largest, the proximal pairs 1.5–2.5 × 0.5–1 cm, the middle ones 2.5–6 × 0.8–1.8 cm, the distal ones 2–6 × 0.8–1.2 cm, oblong or lanceolate, acute, rounded, retuse or emarginate at the apex, obliquely rounded at the base, midvein central or subcentral, 2–3(4) veins from the proximal leaflet base.
Sepals 5, 1.5–3 × 1–2.5 mm, linear, obong, rhombic or lanceolate, imbricate or valvate, ciliate on the margins.
Pods 5–12 × 2–3.5 cm, oblong or obovate, ventral flanges spreading, revolute or suberect, up to 4 mm wide.
Inflorescences in terminal and/or axillary panicles up to 8 cm long; bracts 2–3 × 1.5–2 mm, ovate.
Stipules caducous, free, erect, 2.5–15 × 3–5 mm, subulate; auricles absent.
Flowers up to 3–5 × 2–3 mm; bracteoles 4–7 × 3–4 mm, obovate or circular.
Tree up to 20 m tall; bark shallowly fissured or coarsely reticulate.
Ovary 2–3 × 1–2 mm, densely pubescent, oblong, stipe up to 2 mm long.
Stamens 10, united to 0.5 mm at the base, filaments 6–10 mm long.
Seeds up to 6, up to 20 × 15 mm, circular to oblong.
Dormant axillary buds globose.
Young branchlets pubescent.
Petals absent.
Life form perennial
Growth form tree
Growth support free-standing
Foliage retention deciduous
Sexuality hermaphrodite
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 12.0 - 15.0
Root system -
Rooting depth (meter) 2.7
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Deciduous woodland, locally dominant or co-dominant; typically in zones or groups on ridges, scarps and slopes, notably in shallow, stony or gritty soils over granite, etc.; flat sandy areas; below Brachystegia microphylla; etc.
Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 9-12

Usage

Uses environmental use fiber fuel material
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Can be grown by seedlings.
Mode seedlings
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Distribution

Brachystegia utilis world distribution map, present in Angola, Mozambique, Malawi, Tanzania, United Republic of, Zambia, and Zimbabwe

Conservation status

Brachystegia utilis threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:482264-1
WFO ID wfo-0001057428
COL ID N25P
BDTFX ID -
INPN ID -
Wikipedia (EN)
Wikipedia (FR)

Synonyms

Brachystegia diloloensis Brachystegia utilis