124 ORCHIDACEOUS FLORA OF QUEENSLAND 



Column very short, bicarinate in front. Rostellum 

 deeply bipartite, erect, its segments lanceolate, membranous, 

 reaching about 3 mm. above the base of the column. 

 Anther narrowh' elongated, membranous as high as the 

 rostellum. Stigmata two, rather small, lateral, at the base 

 of the rostellum. 



Mackay, L. J. Xugenf, 13-9-1895. 



The material available for examination is fragmentary ; 

 no further specimens having apparently been gathered 

 since Nugent collected the original material nearly twenty- 

 five years ago. 



The habit of the sjiecies is entirely different from that 

 of the other Australian representative of the genus, the 

 stem being exceedingly slender with basal leaves, and 

 terminated bj' a single bloom or by two or three pedicellated 

 flowers in a loose raceme ; whereas in Z. ohlonga the 

 stem is much stouter with alternate leaves distributed over 

 its lower half or third and ending in a moderately- crowded 

 spike of sessile flowers. Further, in the former the labellum 

 is relatively much longer, more slender and narrow, with 

 very different calli and with wider and differentl}'- shaped 

 terminal lobes. Owing to poverty of material, the 

 structure of the pollinarium could not be definitely 

 ascertained, but there is reason to suppose that it differs 

 considerably in type (especially as regards connection 

 between pollinia and gland) from that which prevails in 

 Z. ohlonga. 



Indications point to a root of tuberous origin. 



