396 ' ORCHIDACEZ. 
The following are Mr. Gunn's notes upon the plants, which I have for 
the present regarded as varieties of each other. 
When collecting the various kinds of Microtis, during a period of two or 
three months, in an immense number of localities, I imagined I perceived ob- 
vious differences in the size of the upper sepals, the lip, and other parts, 
but when dried, the change of colour and shrivelled state, from their usual 
succulent appearance, alters them so much, that I candidly confess myself 
puzzled. 
The variety 9. is common at Circular Head, flowering in all November; 
soil a light loam, approaching to sandy. It is very difficult to dry, many 
being two months, Numerous specimens threw out a small tuber at the 
bottom, in the papers. The number of species of Microtis are more nu- 
merous than I at first supposed, and I anticipate many other species in 
other parts of the colony. 
5. Micnoris arenaria. 
M. sepalis lateralibus linearibus revolutis obtusis dorsali orbiculatà acu- 
minatà galeatà, petalis filiformibus obtusis, labello oblongo truncato 
apiculato plano medio carnoso : callis baseos confluentibus concavis. 
Hab. in Tasmannia in sabulo juxta mare sub fine Dec. Gunn, 916. (hab. 
s. sp. comm. cel. inventor.) 
Of a stouter habit than M. pulchella vivaz. Collected in sand near the 
sea iti the end of December. Fresh water appeared to percolate through 
from behind the neighbouring sand hills, Gunn, 
6. Micrortis rara. R. Brown Prodr. 321. 
M. sepalis lateralibus revolutis petalisque linearibus acutis, labello ob- 
longo-cuneato retuso infra apicem calloso margine subundulato nudo, 
baseos callis confluentibus, spice floribus inferioribus distantibus. 
Hab. in N. Hollandia, prope Portum Jackson, R. Brown ; ora meridionali, 
nec non in Tasmannia in paludosis abunde, Dec.et Januario florida, Gunn, 
917. (hab. s. sp. comm. cel. Gunn, &c.) 
7. Microtis media. R. Br. Prodr. 321. Bot. Mag. t. 3378. 
M. sepalis lateralibus revolutis oblongis acutis, petalis linearibus obtusis, 
labello oblongo-cuneato truncato verrucis globosis granulosis margt- 
nato basi utrinque incrassato disco bicalloso. 
Hab. in N. Hollandie ora meridionali, R. Brown ; austro-occidentali, Cun- 
ningham. 
8. Micnoris alba. R. Brown Prodr. 321. 
M. sepalis lateralibus revolutis linearibus acutis, petalis obovato-linea- 
ribus obtusis, labelli dimidià inferiore lineari superiore dilatatà bifidà : 
disco incrassatà marginibus undulatis calloso-tuberculatis. 
Hab. in N. Hollandie orà meridionali R. Brown ; occidentali ad Swan 
River, Drummond ; in sinu regis Georgii, Collie. (hab. s. sp-) 
CCXXII. ACIANTHUS. 
Acianthus. R. Br. Prodr. 1. 321. Supra p. 24. 
Sepala subringentia, acuminatissima, libera: lateralibus labello suppositis. 
