Encephalartos ferox G.Bertol.

Tongaland cycad (en)

Species

Gymnosperms > Cycadales > Zamiaceae > Encephalartos

Characteristics

Stems unbranched or occasionally branched from base, majority less than 1 m tall and only rarely are they 2 m or more tall, about 30 cm diam. Leaves several to many in a whorl, 1-2 m long including petiole 20-30 cm long; rhachis nearly straight, erect spreading, at first tomentose, glabrescent except for pulvinus; leaflets mainly overlapping in the upper half, more spaced in lower half, reduced in size gradually towards base of rhachis into a few to several prickles; median leaflets broadest towards apex, more or less oblong-elliptic, up to about 15 cm long and 3.5 cm broad, rarely up to 5 cm broad, 2-4 small teeth on upper and lower margin and terminating in 3-5 broadly triangular pungent lobes at the apex. Cones 1-3 together on stout short peduncles, glabrous, shrimp-pink to red (Brazil Red, R.C.S.). Male cones subcylindric, narrowed to both ends, up to about 40 cm long, 7-10 cm diam.; median scales 3-4 cm long, 2.5-3 cm broad, 9-15 mm thick vertically with sharp lateral ridges; bulla face projecting into a decurved beak about 1 cm long, upper and lower facets somewhat rugose, terminal facet 6-10 mm broad, and about 6 mm wide vertically. Female cones ovoid to ovate-oblong in outline, 25-50 cm long, 20-40 cm diam., median scales 5-6.7 cm long; bulla 4.5-7 cm broad, 3.5-5.5 cm thick vertically, with lateral ridges extending into incurved lateral lobes almost to the main axis, upper and lower facets finely wrinkled in basal half, somewhat rugose on apical half, rounded, terminal facet slightly concave, 2-3 cm broad and about 2 cm wide vertically. Seeds scarlet, 4.5-5 cm long, 1.5-2 cm diam., angled by compression, with fleshy beak.
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A small cycad. It has an underground trunk. This can be 3 m long. It is 35 cm across. It is rarely branched but has new suckers near the base. The young leaves can be dark green or coppery brown and hairy. The mature leaves are in large numbers and form a rigid crown of obliquely erect leaves. These are stiff and 1-2 m long by 20-30 cm wide. The leaf stalk is 10-15 cm long. The lower leaflets are reduce to spine like processes. The cones are different. Male cones are 40-50 cm long by 7-10 cm wide. There are 1-10 on each stem. They have a fruit stalk 2-3 cm long. The female cone is 25-50 cm long by 20-25 cm wide. There are 1-5 on each stem. They do not have a fruit stalk. The seeds are 4.5-5 cm long by 1.5-2 cm wide. They are oblong and angular and red.
Leaves about 1 x 0–25 m.; median leaflets up to 20 x 7 cm., ovate with the margin fairly regularly divided into deltoid spinescent teeth which are c. 0–5 cm. long on the lateral margins but appear longer apically; leaflets diminishing in size towards the leaf-base, ultimately becoming bifurcated spines.
Female cone, 30 x 15 cm., 1–3, subsessile, bright red; median cone-scales up to 7 cm. long, glabrous, with a dorsiventrally flattened head of almost square outline bearing two long processes that extend to the cone-axis between the seeds of adjacent scales, the umbo concave terminally and not deflexed.
Seeds 5 x 1–5 cm., bright vermilion-red, becoming black, the fleshy part exceeding the stony inner part distally by about 2 cm.
Median male cone-scales ascending with the head deflexed; head triangular in outline with a hexagonal terminal facet.
Short-stemmed or with a trunk up to 1–3 m. tall.
Life form perennial
Growth form shrub
Growth support free-standing
Foliage retention evergreen
Sexuality dioecy
Pollination entomogamy
Spread -
Mature width (meter) 0.35
Mature height (meter) 1.0 - 1.25
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months
JanFebMar
AprMayJun
JulAugSep
OctNovDec
Fruit color -
Fruiting months -
Nitrogen fixer nostocaceae
Photosynthetic pathway -

Environment

Various habitats ranging from closed evergreen coastal forest to dense shrubland and in grassland areas, growing on deep sands of old beach dune systems, generally in the shade of taller vegetation; at elevations from 20-100 metres.
More
It suits tropical and subtropical zones. It grows in dune scrub near the beach. It grows in areas with rainfall between 100-1,250 mm each year. They cannot tolerate frost. In Adelaide Botanical Gardens.
Light 4-6
Soil humidity 3-5
Soil texture 3-4
Soil acidity -
Soil nutriment -
Hardiness (USDA) 9-10

Usage

Uses -
Edible seeds stems
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Plants can be grown from seeds or 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

Leaf

Encephalartos ferox leaf picture by Sergio Chitara (cc-by-sa)

Flower

Encephalartos ferox flower picture by S Song (cc-by-sa)

Distribution

Encephalartos ferox world distribution map, present in Mozambique and South Africa

Conservation status

Encephalartos ferox threat status: Near Threatened

Identifiers

LSID urn:lsid:ipni.org:names:297084-1
WFO ID wfo-0000667378
COL ID 39NCN
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Encephalartos ferox Encephalartos kosiensis

Lower taxons

Encephalartos ferox subsp. emersus Encephalartos ferox subsp. ferox