Macrozamia macdonnellii (Miq.) A.Dc.

Species

Gymnosperms > Cycadales > Zamiaceae > Macrozamia

Characteristics

Plants caulescent; stem 0.4-3 m tall, 60-80 cm diam.; 50-120 leaves in crown. Leaves 150-220 cm long, moderately keeled, with 120-170 pinnae, blue, dull; petiole 12-25 cm long, 15-25 mm wide at lowest pinna. Basal pinnae reducing to spines. Median pinnae simple, 20-30 cm long, 7-11 mm wide, concolorous to weakly discolorous; margins flat; apex entire, spinescent. Pollen cones fusiform, 25-40 cm long, 8-10 cm diam.; microsporophyll lamina 30-40 mm long, 15-20 mm wide; apical spine 0-25 mm long. Seed cones ovoid, 40-50 cm long, 20-27 cm diam.; megasporophyll with an expanded, peltate apex 8-12.5 cm wide and 4-6 cm long; apical spine 0-20 mm long. Seeds ovoid, 60-80 mm long, 40-53 mm wide; sarcotesta orange or orange-brown.
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A medium sized cycad. The trunk can be erect or lie along the ground. The trunk is 3 m long and 1 m across. The young leaves are powdery blue. The bases are pink. There are many mature leaves forming a graceful rounded crown. The leaves are 1.5-2.5 m long by 30-40 cm wide. They are powdery blue green and swollen and woolly at the base. There are many leaflets crowded along the stalk. The tip is sharp. The average leaflet is 20-30 cm long by 0.7-1.1 cm wide. The cones are different. Male cones are 25-40 cm long by 8-10 cm wide. They are usually curved. Female cones are 40-50 cm long by 20-27 cm wide. They are barrel shaped. The seeds are 6-8 cm long by 3.5-5 cm wide. They are oblong and orange to red.
Life form perennial
Growth form -
Growth support free-standing
Foliage retention evergreen
Sexuality dioecy
Pollination -
Spread -
Mature width (meter) -
Mature height (meter) 0.4 - 3.0
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Nitrogen fixer nostocaceae
Photosynthetic pathway -

Environment

It grows naturally in Central Australia. It is usually on the bare sides or rock gorges. They are in a semi-arid climate. It suits temperate and drier subtropical climates. It does not do well in humid regions. It is best with full sun. It can tolerate heavy frosts.
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Widely scattered in thin soils on rocky slopes, in Triodia grassland or open woodland.
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Usage

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

Cultivation

Plants are grown from seed.
Mode seedlings
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Germination luminosity -
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Images

Macrozamia macdonnellii unspecified picture

Distribution

Macrozamia macdonnellii world distribution map, present in Australia

Conservation status

Macrozamia macdonnellii threat status: Least Concern

Identifiers

LSID urn:lsid:ipni.org:names:59233-3
WFO ID wfo-0000453785
COL ID 6R3X8
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR)

Synonyms

Macrozamia macdonnellii Encephalartos macdonelli