Cycas armstrongii Miq.

Species

Gymnosperms > Cycadales > Cycadaceae > Cycas

Characteristics

Stems to 3 (-6) m tall. Leaves 55-90 cm long, slightly keeled to flat in section (opposing pinnae inserted at 130-160° on rachis), with 100-220 pinnae, pale to mid-green, semi-glossy to highly glossy. Petiole 10-25 (-35) cm long, usually spinescent for 20-60% of length. Median pinnae 5.5-14 cm long, 4.5-8 mm wide, narrowed to 3.5-5 mm at base (to 50-85% of maximum width), inserted at 70-90° to rachis, 6-14 mm apart, glabrous; margins flat; midrib raised above and below. Cataphylls linear, pungent, 6-9 cm long. Pollen cones orange, 11-20 cm long, 7.5-10 cm diam., orange. Microsporophyll lamina 25-35 mm long, 14-17 mm wide; apical spine 7-10 mm long. Megasporophylls 13-22 cm long, with 2-4 ovules; lamina lanceolate, 30-70 mm long, 18-35 mm wide, regularly dentate with 20-28 lateral spines 1-4 mm long and 1-2 mm wide; apical spine 10-25 mm long. Seeds 34-37 mm long, 32-36 mm wide.
More
A palm like plant 2-4 m high. The trunk is rough and dark brown. The trunk is 10-15 cm across. Trees lose their leaves during the year. Male and female trees are separate. The leaves are up to 1 m long and made up of 100 or more leaflets. These leaflets are stiff, flat and narrow. They are 7-14 cm long by 0.5-0.7 cm wide. The stalk has thorns below the leaflets. The male cone is oval and brown. It is 12-20 cm long. It is made up of many scales arranged like a spiral. It grows at the top of the trunk. The female spike is flattened and hairy. There are usually 4 fruit. The fruit are hard and round and 2-4 cm across. They are brown when ripe. There is a single seed inside.
Life form -
Growth form tree
Growth support free-standing
Foliage retention evergreen
Sexuality dioecy
Pollination -
Spread -
Mature width (meter) 0.1 - 0.15
Mature height (meter) -
Root system -
Rooting depth (meter) -
Root diameter (meter) -
Flower color -
Blooming months -
Fruit color -
Fruiting months -
Nitrogen fixer nostocaceae
Photosynthetic pathway c3

Environment

It is an abundant species in dense and extensive populations in sand over Tertiary laterites in Eucalyptus miniata-E. tetrodonta forests.
More
A tropical plant. It grows in open forest. It suits tropical regions with seasonally dry climates. It suits hardiness zones 11-12.
Light -
Soil humidity -
Soil texture -
Soil acidity -
Soil nutriment -
Hardiness (USDA) 11-12

Usage

The nuts are eaten or made into flour after extensive and thorough preparation and cooking. They are roasted, cracked de-husked and pounded and then the pulp is soaked in water for 3 days.
Uses -
Edible seeds
Therapeutic use -
Human toxicity -
Animal toxicity -

Cultivation

Plants are grown from seed. Seed may take 6-18 months to germinate. It can be grown from suckers.
Mode seedlings suckers
Germination duration (days) -
Germination temperacture (C°) -
Germination luminosity -
Germination treatment -
Minimum temperature (C°) -
Optimum temperature (C°) -
Size -
Vigor -
Productivity -

Images

Cycas armstrongii unspecified picture

Distribution

Cycas armstrongii world distribution map, present in Australia

Conservation status

Cycas armstrongii threat status: Vulnerable

Identifiers

LSID urn:lsid:ipni.org:names:296976-1
WFO ID wfo-0000631492
COL ID 32RZS
BDTFX ID -
INPN ID -
Wikipedia (EN) Link
Wikipedia (FR) Link

Synonyms

Cycas armstrongii