|Photo Ken Hill
|The Cycad Pages
- Macrozamia douglasii W. Hill ex F.M. Bailey, "Syn. Queensland Fl., 500" (1883).
- "TYPE: Australia, Queensland, Fraser Island, Sheridan s.n. (lecto K, fide Jones et al. 2001)."
Honouring pastoralist and politician John Douglas (1828-1904), Premier of Queensland 1877-1880 and collector of the type.
M. douglasii is a member of the M. miquelii complex,
recognisable by its large stature, darker green leaves with only the
lowermost 4-8 leaflets reduced to spines, and the very large size of the
male and female cones and the seeds. Leaflets also show distinctive
large white callous bases.
Distribution and habitat:
Queensland, in rainforests or wet sclerophyll forests on deep white
sands of old coastal dune systems on Fraser Island and the Cooloola
Not considered to be at risk (IUCN Red List category LR,lc).
|Photo Ken Hill
Plants arborescent, stem 0-0.6 m tall, 40-70 cm diam.
Leaves 30-100 in crown, deep green, highly glossy, 160-340 cm long,
flat (not keeled) in section, with 120-200 leaflets; rachis not spirally
twisted, straight, lax and pendulous; petiole 45-65 cm long, straight,
spinescent, 12-18 mm wide at lowest leaflets; basal leaflets reducing to spines.
Leaflets simple, strongly discolorous; margins flat; apex entire,
spinescent; median leaflets 270-380 mm long, 7-12 mm wide.
Pollen cones not seen.
Seed cones narrowly ovoid, 40-50 cm long, 15-18 cm diam.;
megasporophyll lamina 55-60 mm long, stipe 35 mm long, megasporophyll with an
expanded peltate apex 55-60 mm wide, 25-30 mm high; apical spine 5-28 mm long.
Seeds oblong, 36-40 mm long, 24-27 mm wide; sarcotesta orange, or