Encephalartos arenarius R.A.Dyer

Dune cycad (en)

Species

Gymnosperms > Cycadales > Zamiaceae > Encephalartos

Characteristics

Plant unbranched or more usually branched from the base; stem up to about 1 m tall and at this length often somewhat reclinate, 20-30 cm diam. Leaves 1-1.5 m long including petiole 15-20 cm long; rhachis spreading, recurved in upper half, glabrous except for brown tomentose pulvinus; leaflets somewhat glaucous, light green when young gradually darker green with age, overlapping in the apical half and in V disposition, more spaced in the lower half and reduced in size occasionally to one prickle; median leaflets oblong-lanceolate, flat or slightly twisted and slightly curved upwards, 12-16 cm long, 2.5-4 cm broad with 1-1.5 cm broad attachment, closely but not prominently veined on lower surface, pungent with upper margin entire or occasionally a single tooth and lower margin usually with 3 rarely 4 flat or slightly twisted pungent lobes. Cones single on short stout peduncles. Male cones (incomplete); median scales 3-3.5 cm long, 2.25-2.5 cm broad; bulla face projected into a beak about 1 cm long. Female cones mainly barrel-shaped with rounded base and apex, 35-45 cm long and 20 cm diam., somewhat glaucous; median scales about 6.5-7 cm long, 5 cm broad and 4 cm thick vertically, with lateral ridges extending into incurved lateral lobes up to 2 cm long; bulla face projecting about 2 cm, upper and lower facets with or without ridges and surface slightly and irregularly undulate or minutely papillate; terminal facet 10-12 mm broad and about the same in width vertically, concave. Seeds coral-red, up to about 5 cm long, 2-2.5 cm broad with fleshy beak.
More
Plant dioecious, palm-like. Stem aerial or decumbent, 0.5-3.5 m long, unbranched or branched from base, covered by alternating series of woody bracts and persistent, swollen, truncated leaf bases. Leaves petiolate, pinnate with rachis recurved; median leaflets lobed, pungent-pointed, margins not markedly rolled under abaxial surface; reduced in size towards base of rachis. Cone Feb.-Dec., single, appears sessile, green. Male cone lanceoloid. Female cone cylindric to ovoid, broader than male, facets flattish, glabrous.
Life form perennial
Growth form shrub
Growth support free-standing
Foliage retention evergreen
Sexuality dioecy
Pollination -
Spread -
Mature width (meter) 1.0
Mature height (meter) 1.5
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer nostocaceae
Photosynthetic pathway -

Environment

Light 4-7
Soil humidity 2-7
Soil texture 5-6
Soil acidity -
Soil nutriment -
Hardiness (USDA) -

Usage

Uses medicinal
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Encephalartos arenarius unspecified picture

Distribution

Encephalartos arenarius world distribution map, present in South Africa

Conservation status

Encephalartos arenarius threat status: Endangered

Identifiers

LSID urn:lsid:ipni.org:names:871771-1
WFO ID wfo-0000667345
COL ID 39NC2
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Encephalartos arenarius