BY R. S. ROGKRS AN* I) C T. WHITE 143 



Spur filiform, about the same widtli throughout, 

 rather long, equal to at least half the length of 

 the pedicellated ovary. Leaves basal, linear 

 lanceolate. Lateral lobes of the labellum 

 narrowly triangular, acuminate, shorter than 

 middle lobe H . jtropinqxtior 



Spur ovoid or rotund, very short, approximating in 

 length to the column. Laliellum tridentate. 



Leaves distributed over lower half of stem, widely 

 elliptic ; stem markedly bracteate. Plant 

 rather stout. Middle lobe of trident wider 

 and either equal to or longer than lateral 

 lobes ; a linear-oblong callus extending 

 along centre of lamina from liase of claw 

 nearly to tip of middle lobe H. Banjieldii 



Leaves at the base, oblong-elliptic. Plant slender, 

 stem- bracts few. Middle lolie of trident 

 about L5 mm. long, narrower and much 

 stouter than lateral lobes ; lateral lobes 

 about 3 mm. long, falco-lanceolate ; an 

 almost quadrate callus occupying the 

 posterior halt of the claw H. ovoidea 



Excluded Species. 



Habenaria mesophyUa. Kraoiizlin, ( )rciiid. C'eu. ct S}). I 204. 



Kraonzlin (I.e.) inchides this ^ijecies among Australian 

 representatives of the genus. The material was supplied 

 by Baron von Muelk^r from the Melbourne Herljariiuu, but, 

 as it was itnaccompanied by names of locality and collector,, 

 it is unsafe to assume that it is of Australian origin. It 

 has, in fact, the features of Ceratopetalae, an African 

 section of Habenaria. The dried flowers show an apparently 

 undivided labellum, owing to the adhesion between the 

 lateral lobes of that organ and the anterior divisions of the 

 petals. 



Owing to defective data, it has not been included in 

 the above key. 



