ORCHIDACE.E. 
Tribe VI. Nxorrzz. 
OrcHipex, Tribus NEorriExm. Lindi. Orch. Scel. No.7. Nat. Syst. ed. 2. p. 341. 
Endlich. gen. p. 212. 
Pollen pulvereum, aut in lobulos elastic’ coherentes colligatum. . Stigma 
sepits in rostellum fissile productum.  Anthera dorsalis, persistens, 
cum stigmate aut columna facie subparallela. Herbs omnes terrestres, 
radicibus fasciculatis ; nunc casu quodam arboribus innascentes, regiones 
temperatas et tropicas humidas montanas utriusque hemisphere habi- 
tantes, circulo arctico ignote ; quadam aphylle, in radices plantarum 
parasiticee, rufæ. Folia membranacea, ensiformia v. petiolata, sepits in 
vaginam caulem circumdantem expansa ; rard dura, plicata, arundinacea. 
Flores spicati, rarissime paniculati, sepits glanduloso-pubescentes, in 
plurimis parvi semiherbacei. 
These plants are distinctly separated from Arethusee by their dorsal, 
not opercular anther; but they cannot be distinguished by their pollen, 
Which is either pulverulent, farinaceous, granular, or sectile. In the 
majority of cases too, tlie stigma is prolonged into a rostellum which is 
divisible into two setze or membranous arms, in consequence of the portion 
connecting them adhering to the pollen masses and falling away. The 
parts are very difficult to examine in a dried state, and require the patient 
observation of botanists who possess the opportunity of studying and draw- 
ing them when fresh. 
Thebard dry plaited form of leaf which occursin Sobralia among Arethusez 
exists here in Tropidia, Cnemidia, and Chloidea, but I cannot combine 
those genera into a section by any good character. Thelymitra may be 
considered to form a transition from the whole order to Iridacez. 
Neottez pass into Arethusez more especially from Epipactis to Cepha- 
lanthera, and from Prasophyllum to Microtis ; into Malaxee from Listera 
to Liparis; and into Ophrez from Neottia to Platanthera, They naturally 
separate into the following divisions : 
Div. Y. Craxicutpm. Columna recta, carnosa, teres. Labellum difforme 
(posticum) concavum, in columnam incumbens eamque ab- 
scondens. Sepala patula v. revoluta. (Rostellum truncatum.) 
Div. II. Liısrerınæ. Columna recta, carnosa, teres. Labellum difforme 
(anticum) patens, ecalcaratum. Sepala patula aut reflexa. 
Div. III. SergaNTu:D8. Columna in pedem producta, carnosa, teres. 
Labellum difforme, (anticum) c. columná parallelum, canalicula- 
tum, nunc in calcar v. cuniculum intra sepalorum bases latentem 
productum. Flores ringentes ; nemp2 sepalis et petalis in 2 labia 
coharentibus. 
September, 1840. M M M 
