444 
Telopea 8(4): 2000 
The two leaf forms are here considered to be sufficiently distinct to be treated as two 
separate — but closely related — species, which accord with the types of X. tcismanica 
(with elliptic leaf segments), and X. huegelii (with linear, oblong, lanceolate or 
oblanceolate leaf segments). 
Keighery (1982) determined the chromosome numbers for many Western Australian 
Apiaceae, and lists all but one species of Xanthosia as having n=10. Only X. pustlla was 
found to have n=20. The chromosome voucher specimens were redetermined in line 
with the two species recognised here. The chromosome numbers for X. huegelii are 
both «=10 (seven specimens) and »=20 (10 specimens), and for X. tcismanica are also 
n=10 and ii=20 (one specimen and two specimens respectively; Table 1). 
Table 1. Current determinations of chromosome voucher specimens following the author's 
concepts. 
Chromosome numbers taken from Keighery (1982) and from sheet information where available. 
Locality 
Xanthosia huegelii 
n 
Voucher and Herbarium 
16 km NW of Cataby, W.A. 
10 
G.J. Keighery s.n., PERTH 3620700 
170 km N of Perth on Brand Highway, W.A. 
10 
G.J. Keighery 97, PERTH 4878728 
5 km S of Corbanup River Store, 
Busselton/Margaret River Road, W.A. 
10 
G.J. Keighery 690, KPBG 
8.5 miles [13.6 km] N of Eneabba, W.A. 
10 
G.J. Keighery 1338, PERTH 3620506 
Cannington Swamp, W.A. 
10 
G.J. Keighery 2102, PERTH 3620581 
24 miles [38 km] S of Nannup on Pemberton 
road, W.A. 
10 
G.J. Keighery 2166, PERTH 3620891 
1.2 miles [1.9 km] W of Brand Highway 
on Mimegarra road, W.A. 
10 
G.J. Keighery 2753, PERTH 3620530 
Inlet River, Walpole to Manjimup, W.A. 
20 
G.J. Keighery 351, PERTH 3621278 
32 km N of Walpole, W.A. 
20 
G.J. Keighery 81, PERTH 4878744 
Mt Burnett Wittenoom Hills 
c.70 km NE Esperance, W.A. 
20 
G.J. Keighery 424, PERTH 3621286, 
CANB 370637 
Mt Merivale c. 30 km E of Esperance, W.A. 
20 
G.J. Keighery 431, PERTH 3621421 
395 mile peg, Ravensthorpe to Esperance road, W.A. 
20 
G.J. Keighery 492, PERTH 1867547 
47.2 miles [75.5 km] E of Albany 
on Jerramungup road, W.A. 
20 
G.J. Keighery 494, PERTH 3621243 
22 miles [35 km] E of Esperance, W.A. 
20 
G.J. Keighery 653, KPBG 
10.2 km N Walpole on Manjimup road, W.A. 
20 
G.J. Keighery 677, PERTH 3621189 
Nicholls road Mt Lofty Ranges, S.A. 
20 
G.J. Keighery 2248, PERTH 3621383 
Mt Merivale E of Esperance, W.A. 
Xanthosia tasmanica 
20 
G.J. Keighery 2887, PERTH 3621448 
18 miles [29 km] S of turnoff to Busselton 
on Yallingup to Karridale Road, W.A. 
10 
G.J. Keighery 2165, PERTH 3620859 
46 km W of Ravensthorpe, W.A. 
20 
G.J. Keighery 104, PERTH 4878752 
25 km NW Denmark on Walpole Road, W.A. 
Not located: listed as X. pusilla by Keighery (1982) 
20 
G.J. Keighery 673, PERTH 3628590 
Nannup, W.A. 
20 
G.J. Keighery s.n. 
24 km S of Manjimup, W.A. 
20 
G.J. Keighery 78 
