Pycnanthus angolensis (Welw.) Warb.

Species

Angiosperms > Magnoliales > Myristicaceae > Pycnanthus

Characteristics

Dioecious or apparently sometimes monoecious (see note), clean straight-boled tree 9–37.5 m. tall, up to 1–1.5 m. d.b.h., with or without rounded not very prominent buttresses up to 3 m. tall; crown small, the branches restricted to the summit and ± at right-angles to the trunk; young branchlets pendulous, densely ferruginous velvety; bark greyish to dark brown, fissured, rough at base; slash deep orange with white patches and copious viscous yellow or red sap (juice said to be dark brownish or tea-coloured in Nigeria and Cameroon); wood reddish.. Leaves oblong to oblong-lanceolate or occasionally ± obovate, 7.5–31(–38) cm. long, 4.3–11(–16) cm. wide, acuminate at the apex, cordate or subcordate at the base, velvety dark brown ferruginous pubescent when young, later glabrescent, at leastabove; lateral nerves 20–40 pairs; petiole 0.9–2 cm. long, ± 4 mm. wide.. Inflorescences scented, axillary or borne on leafless branches, 10–15 cm. long, densely ferruginous velvety; bracts at base of individual clusters of heads of flowers 2–2.5 mm. long, 0.5 mm. wide, tomentose, deciduous; other bracts attain 6×4 mm. (?in young female inflorescences).. Male flowers with perianth 3(–5)-fid, ± 1 mm. long; lobes obovate, covered with minute vesicular glands outside; staminal column sometimes twisted, 1–1.2 mm. long, with 2–4 exserted anthers ± 0.2 mm. long.. Female flowers with broadly ovate perianth-lobes; ovary ± 0.5 mm. diameter.. Fruits yellow or rusty brown, narrowly ellipsoid or oblong to globular, (2–)3–4.5 cm. long, (1.6–)2–4 cm. wide, ferruginous tomentose when young; pericarp 2–10 mm. thick; fruiting pedicels, 3–6 mm. long.. Seeds dark brown, ellipsoid, 1.5–2.9 cm. long, 0.8–1.6 cm. wide; aril red or pink.
More
Leaves 7.5–31 x 4.3–11 cm, oblong to oblong-lanceolate, or ± elliptic, sometimes oblong-oblanceolate, ± long acuminate to sub caudate at the apex, cordate or subcordate at the base, dark green on upper surface, glaucous and very densely minutely glandular-punctate beneath, glabrous or with scattered dark brown stellate hairs on the lower surface more numerous on midrib especially when young; lateral nerves 15–20(40), prominent below; petiole 7–14 mm long, dark brown tomentose with caducous stellate hairs.
An large evergreen tree. It grows 35 m high. The trunk is 25 m tall and 1.6 m across. The main branches come out parallel to the ground, but high up. The leaves are alternate and simple. They are 20-30 cm long by 6-11 cm wide. The fruit are oval and 3-4 cm long by 2.5-3 cm wide. It opens in 2 valves. It has a red layer around the seed like nutmeg.
Infructescence pendulous, branches becoming stout; fruits subsessile, clustered, 3–4(4.5) x (1.6)2–3(3.8) cm, ellipsoid to oblong or pyriform, splitting vertically into two halves, dark brown tomentose when young, yellowish-orange when ripe; pericarp cartilaginous, 2–10 mm thick, becoming thickly woody-crustaceous when dry.
Evergreen tree up to 22(37) m tall; bole up to 0.7(1.5) m d.b.h., branching high up to produce a small crown; sap copious viscous yellow, turning dark red on exposure to air; branches patent, branchlets slender, ± pendulous at the tips, young growth densely tomentose, the hairs reddish-brown stellate and easily rubbed off.
Inflorescences usually borne on 2-or 3-year old branches, below the leaves, 10–15 cm long, paniculate with flowers many in numerous dense clusters on short lateral branches, densely rusty tomentose; bracts subtending the individual clusters of heads of flowers 2–2.5 x 5 mm, tomentose, deciduous.
Male flowers: perianth c. 1 mm long, deeply 3(5)-lobed; lobes obovate; staminal column 1–1.2 mm long, sometimes twisted; anthers 2–4, exserted on the elongating staminal column, the panicle falling entire after flowering.
Flowers unisexual, scented, the perianth completely covered with dark brown vesiculose hairs; plants dioecious.
Female flowers: perianth lobes broadly ovate; ovary ± 0.5 mm in diameter.
Fruit dehiscent with single seed covered by bright red laciniate aril.
Seed single, 1.5–2.9 x 0.8–1.5 cm, ellipsoid-oblong, dark brown.
Aril fleshy, laciniate almost to the base, red or pink.
Long straight bole up to 15 ft. in girth
Bark exuding red sticky juice when cut
Crown of horizontal, whorled branches
A forest tree up to 120 ft. high
Life form perennial
Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality dioecy
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 30.0 - 35.0
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months -
Fruit color
Fruiting months -
Nitrogen fixer -
Photosynthetic pathway c3

Environment

Upland and wet evergreen forest and semideciduous forest, especially abundant in old fallows and secondary forest; riverine and swamp forest in the south of its range. Mostly found in small groups or solitary, at elevations up to 1,400 metres.
More
A tropical plant. It grows in wet forest with over 1,600 mm rainfall. It needs good sunlight. It is often along river banks. It is sensitive to drought. In Nigeria it grows to 1,200 m above sea level.
Light 7-9
Soil humidity 4-6
Soil texture 1-6
Soil acidity -
Soil nutriment -
Hardiness (USDA) 10-12

Usage

An oil is made from the seeds but it is not edible. The leaves are cooked as a vegetable.
Uses coffee substitute environmental use food fuel material medicinal oil social use timber wood
Edible leaves seeds
Therapeutic use Thrush (unspecified), Vermifuge (unspecified), Medicine (unspecified)
Human toxicity -
Animal toxicity -

Cultivation

Plants are grown from seed, but seed are slow and irregular to grow. They should be sown fresh. They should be soaked in cold water for 24 hours. They may take 16-36 days to germinate.
Mode cuttings seedlings
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment soaking
Minimum temperature (C°) -
Optimum temperature (C°) 20 - 28
Size -
Vigor -
Productivity -

Images

Pycnanthus angolensis unspecified picture

Conservation status

Pycnanthus angolensis threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:586520-1
WFO ID wfo-0000476435
COL ID 4QLWL
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Pycnanthus kombo Pycnanthus niohue Pycnanthus angolensis Myristica angolensis Myristica kombo Pycnanthus schweinfurthii Myristica niobue Pycnanthus kombo var. angolensis Pycnanthus mechowii

Lower taxons

Pycnanthus angolensis var. angolensis Pycnanthus angolensis subsp. schweinfurthii