Encephalartos lehmannii Lehm.

Karoo cycad (en)

Species

Gymnosperms > Cycadales > Zamiaceae > Encephalartos

Characteristics

Plant unbranched or more frequently branched from the base with stems up to about 1.5 m tall, rarely up to 2 m, 25-45 cm diam. Leaves 1-1.5 m long including petiole up to 25 cm long, glabrous, glaucous when young, dark green with age; rhachis straight, or sometimes slightly recurved and rarely with the apex twisted sideways, with stout tomentose pulvinus with conspicuous red-brown collar; leaflets spaced in the lower half of the leaf and reduced in size possibly to one prickle, closely set in the upper half but not much overlapping, in V disposition; median leaflets linear-lanceolate, 12-18 cm long, 1.7-1.9 cm broad, pungent, entire or rarely with 1 or 2 small teeth on lower margin. Cones solitary, on short stout peduncles, blackish-red because of short dense blackish hairs on the terminal half of the bulla face or sometimes greyish on the terminal facet. Male cones subcylindric narrowed to apex and base, 25-35 cm long, 8-10 cm diam.; median scales 2.25-2.5 cm broad, 1 cm thick vertically; bulla face projected into a beak about 1.5 cm long with acute lateral ridges, terminal facet 5-8 mm broad and about 5 mm wide vertically. Female cones ovoid or barrel-shaped, 30-50 cm long, 15-23 cm diam.; median scales about 6-7 cm long and 6 cm broad and 3-5 cm thick vertically with lateral ridges extending into the incurved lateral lobes 1-1-5 cm long; bulla face protruding about 2 cm, almost smooth, the upper facet with a central ridge, lower facet rounded, terminal facet 1.5-1.8 cm broad, 1-1.5 cm wide vertically, slightly concave with acute upper margin. Seed red, angled by compression, 4.7-5 cm long, about 2 cm diam., with fleshy beak.
More
Plant dioecious, palm-like. Stem aerial or decumbent, 0.5-2.5 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, entire, pungent-pointed; reduced in size towards base of rachis. Cone Feb.-Dec., single, appears sessile, maroon or green. Male cone oblanceoloid. Female cone cylindric to ovoid, broader than male, facets glabrous, central facet not raised.
Dioecious tree to 2 m, often branched from base. Leaves pinnate, dark green but glaucous when young, leaflets linear-lanceolate, pungent, sometimes 1-or 2-toothed. Female cones green, to 50 cm.
Life form perennial
Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality dioecy
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 1.25 - 1.75
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer nostocaceae
Photosynthetic pathway -

Environment

Light 4-6
Soil humidity 2-4
Soil texture 3-4
Soil acidity -
Soil nutriment -
Hardiness (USDA) 9-9

Usage

Uses environmental use material
Edible -
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Mode -
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -7
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Habit

Encephalartos lehmannii habit picture by Daniel Barthelemy (cc-by-nc)

Distribution

Encephalartos lehmannii world distribution map, present in South Africa

Conservation status

Encephalartos lehmannii threat status: Vulnerable

Identifiers

LSID urn:lsid:ipni.org:names:297107-1
WFO ID wfo-0000667408
COL ID 6F84Q
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Encephalartos lehmannii f. spinulosus Zamia glaucescens Encephalartos spinulosus Encephalartos lehmannii var. spinulosus Zamia spinulosa Zamia lehmanniana Encephalartos lehmannii f. dentatus Encephalartos mauritianus Encephalartos lehmannii