Briggs and Johnson, New species of Restionaceae in Western Australia 
253 
Similar to O. laxiflorum but distinguished by one node and small sheath near the mid¬ 
point or usually in the upper half of most culms, the paler basal sheaths and glumes; 
bracts and glumes with shorter mucros. The mucro of the subtending bract of both 
male and female spikelets is 0.8-1.2 mm long, cf. (2—)3—5 mm in O. laxiflorum. Plants of 
O. nodatum may generally be slightly taller and have larger male spikelets than 
O. laxiflorum, but the collections are too few to determine the extent of variation. 
O. microcarpum differs in its lesser height, paler basal scales and glumes, and the 
females often having several spikelets per culm. 
Specimens examined: Western Australia: Irwin: 10 km N of Cataby, Dec. 1995, D. Woodman TW17 
9 (PERTH), Jan 1996, D. Woodman DWT 24 9 (PERTH); N Woolka Road, c. 8 km W of junction 
with Cooljarloo Road, 6 Nov 1988, B. Keighcry 521b 6 (PERTH); N Woolka Road, c. 8 km W of 
junction with Cooljarloo Road, 16 Oct 1990, G. Keighery 11908 6 (PERTH, NSW); Eneminga 
Reserve, Mar 1966, Bowler s.n. 6 (PERTH, NSW 259316). 
Fig. 3. a-c. Onychosepalum nodatum, a & b, female: a, habit; b, spikelet ( George 14196); c, male 
spikelet ( Keighery 52.1B). d, O. laxiflorum, female spikelet (South Stirling, Briggs 6583 & Johnson, 
NSW). Scale bar: a = 3 cm; b-d = 5 mm. 
