ARETHUSEE. . 397 
Petala minora, acuminata. Labellum liberum, integrum, basi bicallosum. 
Columna semiteres, clavata. Anthera terminalis, recumbens, bilocu- 
laris. Stigma ovatum, prominens, transversum.  Pollinia 8, subpul- 
verea. Herbe tenere, glabellie. Tubercula indivisa solitaria nuda, 
novello pedicellato. Caulis unifolius, ad ipsam basin vagina brevi in- 
clusus, superné ebracteatus. Folium profunde cordatum, reticulato- 
venosum, subtus rufum, Flores racemosi, v. solitarii, rufi, aut purpurei. 
I formerly included this genus among Malaxidez, partly on account of 
its resemblance in habit to Liparis, and partly because of the firmness of 
the pollen masses. Its relation to Cyrtostylis is however so great, and 
the cohesion between the particles of pollen is so slight that it seems 
better upon the whole to place it here. There can, however, be no doubt 
that this genus, and Cyrtostylis, connect the sections of Arethusez and 
Malaxidez, as I have already stated, p. 25. 
l. Actanruus exsertus. R. Brown Prodr. 321. 
A. floribus racemosis, aristis brevissimis, galeá basi attenuata, petalis hori- 
zontaliter reflexis, labello apice papuloso, columná exserta. 
Hab. ad Portum Jackson Nove Hollandie, R. Brown; cum A. fornicato 
A. Cunningham ; nec non in Tasmannia in solo levi argillaceo, medio 
hyeme (Jun.—Jul.) florens. Gunn 752. (hab. s. sp.) 
2. Acianruus fornicatus. R. Brown Prodr. 321. Endl. ic. gen. t. 1589. 
A. floribus racemosis, aristis perianthio quadrupld brevioribus, petalis erec- 
tiusculis, labello longitudinaliter papuloso, columna inclusá. 
Hab. ad Portum Jackson Nove Hollandie, R. Brown, in preruptis obum- 
bratis abundé, 4. Cunningham. (hab. s. sp.) 
3. Actanruus caudatus. R. Brown Prodr. 321. 
A. scapo 1-2-floro, aristis longissimis, folii marginibus undulatis. 
B, ater; folio minüs undulato subrepando, aristis brevioribus et latio- 
ribus. ; 
Hab. ad Portum Jackson Nove Hollandie, R. Brown, in preruptis um- 
brosis ad littus Junio flor. rard, R. Cunningham, B in Tasmannia Juxta 
Woolnorth, Oct. Gunn. 758. (hab. s. sp.) ; 
The plant found in Van Diemen’s land by Mr. Gunn has larger flowers 
than that of Port Jackson, with shorter aristæ, and may be a distinct 
Species. I have given it to some of my friends under the name of 
4. ater. Mr. Gunn says that its small size and dark colour cause it to be 
readily overlooked. 
4. AcraNTHUs rivularis. .4. Cunningh. in Bot. Mag. Compan. 2. 376. 
A. caule unifloro folio breviore, sepalis lateralibus petalisque longissim? et 
tenuissime aristatis, galea acuminata, labello cordato acuminato venoso 
disco papilloso margine tenuissime eroso-crenulato. 
Hab. in N. Zelandia, prope Wangaroam, inter muscos in alveo rivuli 
Saxoso inter rupes altas fluentis, Nov. R. Cunningham. (hab. s. sp.) 
A most rare and curious little plant, only a few inches high, with the 
largest flowers known in the genus. 
February, 1840. rr? 
