217 



Spike from 1| to nearly 5 in., flowers 10 to 24, iiot 

 crowded, about 7 lines long, sweet-scented, with prune-col- 

 oured labella. Expansion of flowers begins in the middle of 

 spike, extending upwards and down^Yards. 



Lateral sepals, 3 to 3|- lines, free in mature flower (they 

 are shown too far apart in Fitzgerald's plate), dull-green, 

 lanceolate, concave, and with incurved margins at the top. 



Dorsal sepal about 3 lines, greenish, broadly lanceolate, 

 flat, spreading, and recurved at the top in mature flower. 



Lateral petals 2 to 2h lines, green with dark-red longi- 

 tudinal stripe, rather bluntly linear, divergent (though not 

 markedly so) in mature flower. 



Lateral index about 69. 



Labellum prune-coloured, sessile, slightly contracted at 

 base ; an erect, rather gibbous portion with entire margins ; 

 and a broadly triangular laminar portion with crenulated 

 edges passing forward almost at a right angle to the erect 

 portion ; callous portion deep-prune-coloured, raised pubes- 

 cent, ending abruptly near the tip ; membranous portion of 

 lighter hue and rather smaller in area than callous part. 



Lateral appendages of column membranous, widely 

 quadrangular with rounded angles, as high as rostellum, 

 with wide rounded basal lobe reaching to about the middle. 



Anther-case reddish-brown with rather blunt anther- 

 point (recurved after removal of pollinia). 



Pollinia 2 ; vertically bilobed. 



Rostellum triangular with shallow bifid apex for recep- 

 tion of disc. 



Stigmatic surface just below rostellum, wide, almost rec- 

 tangular, with wide transverse opening into pollen tube. 



Caudicle rather short, attached in the usual way to the 

 rostellum side of the conjoined pollinia. 



Ovary about 3^ lines, rather turgid, standing well out 

 from the axis of the spike. 



Found blooming in alluvial soil in October and early 

 November in National Park, and other parts of the Mount 

 Lofty Ranges. 



A distinct but rare form. 



DESCRIPTION OF PLx\TES. 

 Plate VII. a. 



Fig. 1. Side riew of flower, x4: Is, lateral sepals; ds, dorsal 

 sepal; J p, lateral petals; I, labellum; lap, lateral 

 appendage of column; o, ovai-y. 

 ,, 2. Dorsal view, x4: lettering as in fig. 1. 



