Alstonia boonei De Wild.

Species

Angiosperms > Gentianales > Apocynaceae > Alstonia

Characteristics

Tree 25–30(–40) m high with white latex; trunk up to 1.4 m in diameter, with or without buttresses up to 8 m high; bark grey, white or yellowish, smooth or scaly.. Leaves in whorls of 4–9, petiolate; blade (narrowly) obovate, rarely oblong, 8–19(–24) cm long, 3.5–7.5 cm wide, acuminate, rarely obtuse or retuse at the apex, decurrent into the petiole, coriaceous; secondary veins in 25–50(–60) pairs, forming an angle of almost 90° with the midrib and a neat submarginal vein; petiole 0.6–2.9 cm long.. Inflorescence compound-subumbellate, 7.5–23 cm long, pubescent in all parts; bracts small, sepal-like; pedicel 0.2–0.6 cm long.. Flowers with sepals broadly ovate, 1–2.2 mm long, 1–2.7 mm wide; corolla yellow-green to pale green; lobes pale yellow, rarely white, salver-shaped; tube 6.5–14 mm long; lobes obliquely ovate or obovate, 2.5–6.5 mm long, acute or obtuse; pistil 4.5–11.5 mm long.. Fruits of two linear follicles, 22–57 cm long, 0.2–0.4 cm wide, pubescent, dehiscent; seeds many, in two rows, with a thickened margin, bearing long stiff hairs at the ends and much shorter ones at the side.. Fig. 20 (p. 59).
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A tree. It grows 25-30 m tall. The trunk can be 1.4 m across. It can have buttresses 8 m tall. The leaves are in rings of 4-9. They are 8-19 cm long by 4-8 cm wide. The flowers are in a compound group 8-23 cm long at the ends of branches. The fruit are 2 long follicles 22-57 cm long by 0.2-0.4 cm wide. They are hairy. There are many seeds in 2 rows.
Paired, narrowly-cylindric fruiting follicles 12-20 in. long.
Tree 30-120 ft. high with whorled leaves and branches
Many-flowered terminal inflorescences
Life form perennial
Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality hermaphrodite
Pollination entomogamy
Spread -
Mature width (meter) -
Mature height (meter) 25.0 - 30.0
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Evergreen and deciduous forest in damp situations. Primary, as well as secondary, moist evergreen to dry semi-deciduous forest at elevations up to 1,200 metres. It is sometimes found in swampy locations and by the sides of streams.
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It is a tropical plant.
Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 9-12

Usage

Uses environmental use food fuel gum material medicinal poison social use wood
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

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

Images

Leaf

Alstonia boonei leaf picture by Sylvain Piry (cc-by-sa)

Flower

Alstonia boonei flower picture by Sylvain Piry (cc-by-sa)

Distribution

Alstonia boonei world distribution map, present in Angola, Benin, Central African Republic, Côte d'Ivoire, Cameroon, Congo, Ethiopia, Gabon, Ghana, Guinea, Gambia, Guinea-Bissau, Equatorial Guinea, Liberia, Nigeria, Senegal, Sierra Leone, South Sudan, Togo, Tanzania, United Republic of, and Uganda

Conservation status

Alstonia boonei threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:76511-1
WFO ID wfo-0000951936
COL ID C8SV
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Alstonia boonei