104 
Additional selected specimens examined : Queensland. 
Wide Bay District: Eli Creek, 5 km N of Happy Valley, 
Fraser Island, Nov 1994, Bean 8072 (BRI). Moreton 
District: Alexander Clark Memorial Park, Loganholme, 
Jan 1995, Bean 8184 (BRI); end of Wallaby Way, 
Pimpama, May 2003, Bean 20424 (BRI); near landing 
ground, Aug 1998, Dowling W281 & Stephens (BRI). 
New South Wales. Mangrove Creek, c. 3 km upstream 
from Back Channel off Clarence River, N of Maclean, 
May 2005, Phillips 1299 & Phillips (BRI); Seale Road, 9 
km ESE of Kempsey, Dec 2007, Bean 27131 (BRI). 
Distribution and habitat : Enydra woollsii 
extends from near Bundaberg in Queensland 
to Sydney in New South Wales. It is confined 
to areas within a few kilometres of the coast, 
and on some adjacent islands. It inhabits poorly 
Austrobaileya 8 ( 1 ): 103-105 ( 2009 ) 
drained flats beside rivers and creeks that may 
often be tidal. These areas may occasionally 
be inundated by fresh or brackish water. The 
plant communities in such places are often 
dominated by Casuarina glauca Sieber ex 
Spreng. or Melaleuca quinquenervia (Cav.) 
S.T.Blake. Sometimes it grows in swampy 
areas behind frontal beach dunes where 
Casuarina equisetifolia L. is present, and 
where some salt would be received from 
maritime winds. 
Notes: Enydra woollsii differs from 
E.fluctuans in several significant ways, as 
outlined below in Table 1. 
Table 1. Character differences between Enydra fluctuans and E. woollsii 
Enydra woollsii 
Enydra fluctuans 
Habitat 
terrestrial 
semi-aquatic to aquatic 
Habit 
flowering stems prostrate or 
weakly ascending 
flowering stems more or less erect 
Lower stems 
solid, to 3 mm diameter 
hollow, 5-10 mm diameter 
Leaf base 
cuneate 
hastate 
Leaf margins 
strongly serrate, with 3-7 
teeth per side 
obscurely serrulate, with 10-20 
teeth per side 
Petioles 
2-5 mm long 
0-2 mm long 
Outer involucral 
bracts 
4-10 mm long 
11-20 mm long 
Palea indumentum 
sessile glands only 
sessile glands and ciliate hairs 
Acknowledgements 
I am grateful to the Director of SING for 
sending specimens of Enydra fluctuans on 
loan, to Brendan Lepschi for sending an image 
of the type of E. woollsii , and Tony Orchard 
(Australian Botanical Liaison Officer 2008- 
2009) for confirming the absence of type 
material of E. woollsii at K. 
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