125 
found in such habitats are not the one causing a nuisance 
in the stirf. Like the Colpomenia this latter species may 
originate in estuarine localities, though a brief search of 
the Nerang River estuary during the pollution of Christ- 
mas, 1952, revealed no sign of any attached plants and 
further observations will be necessary to determine the 
source of the infestation. 
ORCHIDS OF THE MOUNT BALLOW AREA 
T. E. HUNT 
The following species were noted during the Easter 
Camp, 1953 : — Thelymitra sp., *ChilogloiUs reflexa 
(Labill.) Druce, *Acianthus fornieatus R.Br., *Caktrienia 
alba R.Br., *Pterostylis obtusa R.Br., *P. nutans R.Br., 
*P. baptist ii Fitzg., *8piranthe& sinensis (Pers.) Ames, 
*Liparis reflexa (R.Br.) Lindl., Calanthe veratrifolia 
R.Br., Dendrobiuni acmulum R.Br., I). gracilicaule F. 
Muell., D. kingianum Bidw., D. linguiforme Sw., I), 
monophyllum F. Muell., D. speciosum Sm.. />. teretifolium 
R.Br., Bulboph ijllum aurantiacurn F. Muell., *B. 
exiguum F. Muell B. elisae (F. Muell.) Bentli., Dipodium 
punctatum (Sm.) R.Br., Sareanthus tridentatus (Lindl.) 
Rupp, Bhinerrhiza divitiflora (F. Muell.) Rupp, 
Sarcochilus falfcatus R.Br., B. eeciliae F. Muell.. and 
two or tln-ee further Sarcanthinae unidentifiable with- 
out flowers. 
Only those marked * were in flower. 
This list by no means exhausts the known orchid 
flora of the area. The autumn is not a very good time 
of the year for orchids in the south of Queensland as few 
of the epiphytes are in bloom and most of the terres- 
trials are either completely dormant and below ground 
or just producing their first leaves. 
The area comprises rain-forest open forest, rocky 
hillsides, grassy ridges, and creek flats, and orchids are 
to be found in all of them. Perhaps the most interest- 
ing small area near the camp was the rocky cliff beside 
the swimming hole. On its face were colonies of Liparis 
reflexa, Dendrobium speciosum, I), linguiforme, and 
Sarcochilus eeciliae; while the crevices and upper edges 
carried D. kingianum, Pterostylis nutans, P. obtusa, 
Acianthus fornieatus, Chiloglottis reflexa, and the young 
leaves of Thelymitra sp. 
.VII of the orchids noted have a wide distribution 
