40 
(1894) and Kiikenthal (1924, 1938, 1943). 
Although we have not seen the type of 
Domin’s variety, it is clearly illustrated in his 
account and from the brief description of the 
specimen in the protologue, it differs only 
in the longer involucral bracts from typical 
C. pedunculosus. Hence, neither the name 
Cyperus montis-sellae or any of the previously 
published varieties of C. pedunculosus are 
applicable to the species being described as 
new in this paper. 
2. Cyperus alaticaulis R.Booth, D. J.Moore & 
Hodgon, species nova a Cypero pedunculoso 
inflorescentia simplici (in illo complexo), 
spiculis pluribus in quaque spica (10-25 non 
1-7) et stamine solitario (in illo 3) differens. 
Typus: Queensland. Cook District: 26 km 
WSW of Lockhart River township, 7 km SSE 
of Mount Bowden, Cape York mapping site 
679 (HEL 41), 20 April 1993, J.R.Clarkson 
9933 & V.J.Neldner (holo: BRI; iso: CNS, K, 
NSW). 
Cyperus sp. (Chester River J.R.Clarkson 
2392); Booth (2007: 58). 
Plants slender, perennial, glabrous. Culms 
tufted, erect, triquetrous, increasingly winged 
towards the distal end, 19-36 cm long, 1-3.8 
mm wide; base swollen and bulbous. Leaves 
basal, 8-20 cm long, 2.5-4 mm wide, 
septate-nodulose. Involucral bracts 2-5, 
unequal in length, longer than inflorescence. 
Proximal bract 4-12 cm long, 3-4.3 mm 
wide. Inflorescence simple, 1-2 cm long, 1- 
2.5 cm wide. Spike globose or ovoid, dense, 
10-20 mm long 10-25 mm wide, with 5-30 
spikelets. Rachis angular, winged. Spikelets 
10-20 mm long, 2.5-3.5 mm wide, 10-35- 
flowered, straight, digitate, spreading or 
reflexed, linear to linear-lanceolate. Glumes 
distichous, 2.2-2.8 mm long, apex mucronate, 
one half to two thirds imbricate, keeled, 1—1.2 
mm apart, 1 or 2 nerved, with arcuate keel. 
Rachilla straight. Stamens 1. Anthers 0.5-0.8 
mm long. Style 0.7-1.1 mm long, 3-fid, longer 
than or as long as stigmas, shorter than nut, 
flat. Nut ellipsoid, trigonous, one third to half 
as long as glume, 1.2-1.8 mm long, 0.7-1 mm 
wide, granulose, apex rounded, dark brown to 
brown. Fig. 3 A-E. 
Austrobaileya 8(1): 35-46 (2009) 
Additional selected specimens examined : Queensland. 
Cook District: 1 km SE of Heathlands, near the pump 
site. Mar 1992, Clarkson 9309 & Neldner (BRI, DNA, 
K, MBA, NSW, P); Chester River, on Eastern fall of 
Mcllwraith Range, Jul 1978, Clarkson 2392 (BRI); 9 
km N of Batavia Downs on the Peninsula Development 
Road, Apr 1990, Clarkson 8531 & Neldner (BRI, K, 
NSW). 
Distribution and habitat: Cyperus alaticaulis 
is endemic to Queensland on northern Cape 
York Peninsula where it has been recorded 
from the Chester River northwards (Map 1). 
Plants grow in dry sandy loams in eucalypt 
woodland. 
Notes: Cyperus alaticaulis is distinguished 
within this group by the simple inflorescence, 
winged culms and broad, proximal involucral 
bracts (3-4.3 mm wide). 
It is not a common species and has only 
been collected at four localities. Although 
it is found in a similar habitat to Cyperus 
eboracensis it can be easily distinguished 
from that species by the winged culms and 
broader involucral bracts. 
Etymology: From the Latin alatus (winged) 
and caulis (stemmed), so named because 
the culm becomes increasingly triquetrous 
towards the distal end. 
3. Cyperus eboracensis R.Booth, 
D.J.Moore & Hodgon, species nova a 
Cypero pedunculoso inflorescentia simplici 
(in illo complexo) et cauli basi tumido 
bulbosoque differens. Typus: Queensland. 
Cook District: 3.7 km E of the Peninsula 
Development Road on an IWS track leaving 
the main road 0.5 km N of the Laura River, 
26 April 1983, J.R.Clarkson 4721 (holo: BRI; 
iso: NSW). 
Cyperus sp. (Cape York J.R.Clarkson +8126); 
Booth (2007: 58). 
Plants slender, perennial, glabrous. Culms 
tufted, erect, triquetrous, striate, glabrous, 
30-60 cm long, 0.6-1 mm wide, base swollen 
and bulbous. Leaves basal, 12-30 cm long, 1- 
3.5 mm wide. Involucral bracts 4-6, unequal 
in length, longer than inflorescence, scabrous. 
Proximal bract 5-30 cm long, 1.5-2.8 mm 
wide. Inflorescence simple, 10-25 mm long, 
10-30 mm wide. Spike sessile, globose, 
ovoid or hemispherical, dense, 10-25 mm 
