Photo Ken Hill
logo
The Cycad Pages
Macrozamia polymorpha

Macrozamia polymorpha D.L. Jones, Fl. Australia 48: 718 (1998). H—CANB
"TYPE: Australia, New South Wales, c. 4.2 km N along Dandry Road from Newell Highway, 7 June 1991, D.L. Jones 7487 & B.E. Jones (holo CANB; iso BRI, MEL, NSW)."


Etymology: Greek, poly-, many, and -morphus, -shaped, in reference to the divided and undivided leaflets.

Historical notes: Treated by Jones (1993) as Macrozamia 'species southern Pilliga'.

Distinguishing features: Distinguished within the M. heteromera complex by the bright green, broader leaflets that are usually entire, and the entire seedling leaflets.

Distribution and habitat: Locally abundant around Coonabarabran and north to the southern Pilliga Scrub, in dry sclerophyll woodlands on sandy soils over sandstone.

Conservation status: Not considered to be at risk (IUCN Red List category LR,lc).
Photo Ken Hill

Description:

Plants acaulescent, stem 10-25 cm diam.

Leaves 2-7 in crown, bright green, semiglossy, 50-100 cm long, strongly to moderately keeled, with 70-110 leaflets; rachis not spirally twisted to moderately spirally twisted, straight, stiff or recurved, arching stiffly downwards; petiole 12-22 cm long, straight, unarmed, 7-10 mm wide at lowest leaflets; basal leaflets not reducing to spines.

Leaflets simple or dichotomously branched, concolorous or weakly discolorous; margins flat to recurved (slightly); apex entire, not spinescent; median leaflets 120-260 mm long, 5-9 mm wide (ultimate segments 3-5).

Pollen cones fusiform, 16-25 cm long, 4.5-5.5 cm diam.; microsporophyll lamina 16-24 mm long, 13-19 mm wide; apical spine 2-15 mm long.

Seed cones ovoid, 13-20 cm long, 7-9 cm diam.; megasporophyll lamina 35-45 mm long, megasporophyll with an expanded peltate apex 45-50 mm wide, 15-20 mm high; apical spine 2-30 mm long.

Seeds ovoid, 26-30 mm long, 22-25 mm wide; sarcotesta red.


The Cycad Pages

© 1998-2012 Royal Botanic Gardens Sydney
Written and maintained by Ken Hill 1998-2010
Maintained by Leonie Stanberg and Dennis Stevenson 2010-2012
This site is currently not being maintained