|The Cycad Pages
- Macrozamia macdonnellii (F. Muell. ex Miq.) A. DC., Prodr. 16(2): 537 (1868). ?H—MEL
In reference to the occurrence in the MacDonnell Ranges.
The distinct clear petiole and amphistomatic leaves suggest that this
species is allied to the Western Australian taxa. It is readily
distinguished by the strong blue colour and the very large seeds and
Distribution and habitat:
Northern Territory, the MacDonnell Range and associated range systems.
Widely scattered on thin soils on rocky slopes, in Triodia
grassland or open woodland.
Not considered to be at risk (IUCN Red List category LR,lc). Gazetted under Northern Territory legislation ...
1997 IUCN Red List of Threatened Plants category V.
Plants arborescent, stem 0.4-3 m tall, 60-80 cm diam.
Leaves 50-120 in crown, blue, dull, 150-220 cm long, moderately
keeled, with 120-170 leaflets; rachis not spirally twisted, recurved,
arching stiffly downwards; petiole 12-25 cm long, straight, spinescent, 15-25 mm
wide at lowest leaflets; basal leaflets reducing to spines.
Leaflets simple, concolorous to weakly discolorous; margins flat;
apex entire, spinescent; median leaflets 200-300 mm long, 7-11 mm wide.
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
lamina 70-100 mm long, stipe 50-70 mm long, megasporophyll with an expanded
peltate apex 80-125 mm wide, 40-60 mm high; apical spine 0-20 mm long.
Seeds ovoid, 60-80 mm long, 40-53 mm wide; sarcotesta orange, or