Encephalartos hildebrandtii A.Braun & C.D.Bouché

Mombasa cycad (en)

Species

Gymnosperms > Cycadales > Zamiaceae > Encephalartos

Characteristics

A medium to large sized cycad. The trunk can be 6 m tall. There are new suckers near the base. The young leaves are reddish or brown. They have fine hairs. The mature leaves form a rounded crown. They are 2-3 m long by 30-60 cm wide. The leaf stalk is 2-7 cm long and it is swollen at the base. The leaflets are narrow and the lower leaflets from short spines. The cones are different. The male cones are 20-50 cm long by 5-9 cm wide. They are greenish yellow and with 3-8 on each stem. The fruit stalks are 5-25 cm long. The female cones are 28-60 cm long by 15-25 cm wide. They are barrel shaped and there are 2-4 on each stem. The fruit stalks are 4-6 cm long. The seeds are 3-3.8 cm long by 1.5-2 cm wide. They can be red, yellow or orange and are angular.
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Leaves up to 3 m. long, white woolly when young; median leaflets up to 35 x 4–5 cm., lanceolate, falcate, but with the tips curved forwards above, margin with 2–6 spiniferous teeth on each side which are more closely set towards the base; leaflets reducing in size towards the base, and becoming elliptic, being ultimately replaced by short spines which continue to the petiole-base.
Male cones up to 50 x 9 cm., cylindric-fusiform; peduncle 5–25 cm. long; median cone-scales distinctly ascending with the heads sharply deflexed so that the terminal facet is retained in a plane parallel to the cone-axis; heads triangular-rhomboid with a rounded adaxial margin, terminal facet rhombic and concave.
Female cones up to 60 x 25 cm., cylindric, dull yellow; peduncle 4–6 cm. long; median cone-scales truncate-deltoid in outline with the rhomboid heads deflexed; terminal facet hexagonal and concave.
Seeds 3 cm. long, oblong-ovoid, vermilion.
Trunk up to 6 m. tall.
Life form perennial
Growth form tree
Growth support -
Foliage retention evergreen
Sexuality dioecy
Pollination entomogamy
Spread -
Mature width (meter) -
Mature height (meter) 5.5 - 6.0
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer nostocaceae
Photosynthetic pathway -

Environment

They suit tropical and subtropical climates. They need a sunny position and good drainage. They cannot tolerate frost. It grows in sparse deciduous forests and in grassland. They grow from sea level to 600 m altitude. They grow in regions with hot humid summer climates and mild dry winter climates. These places have a summer rainfall of 1000-1400 mm per year. It suits hardiness zones 10-12.
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Coastal evergreen bushland, lowland forest and dry montane rainforest on red loams and sandy soil, at elevations from sea level to 1,200 metres. Sandy plains and rocky hill tops.
Light 4-6
Soil humidity 3-5
Soil texture 3-4
Soil acidity -
Soil nutriment -
Hardiness (USDA) 9-11

Usage

Flour is prepared from the seeds after they have been boiled and dried. Caution: The seeds are eaten as a famine food but are reported to cause liver cancer. The starch of the trunk can be extracted and used for food. It is chopped and heaped for a week to allow fermentation then it is washed in hot water and sun dried before pounding into flour and using in porridge.
Uses environmental use food gum material medicinal poison social use
Edible fruits seeds
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Plants are grown from seed or by removal of suckers. Suckers transplant easily.
Mode seedlings
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -7
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Encephalartos hildebrandtii unspecified picture

Conservation status

Encephalartos hildebrandtii threat status: Near Threatened

Identifiers

LSID urn:lsid:ipni.org:names:297092-1
WFO ID wfo-0000667386
COL ID 39NCX
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Encephalartos villosus f. hildebrandtii Encephalartos hildebrandtii Encephalartos hildebrandtii var. hildebrandtii