[Proc. Eoy. Soc. Victoria, 30 (N.S.), Pt. II., 1918]. 



Akt. XI. — Chiloglottis Pescottiana, s]). nov. 



By K. S. ROGERS, M.A., M.D. 



(Coiiimunicated by Professor A. J. Ewart, D.Sc). 



(With Plate XX v.-*. 



[Read 8th November, 1917]. 



A slender glabrous plant 3 to 7 inches high ; with two basa\ 

 leaves on long petioles, oblong-lanceolate, of varying length and 

 width, usually li-2 inches long; one bract, sheathing, acuminate,, 

 situated above the middle of the stem. Flowers single, greenish- 

 bronze, with dark purple calli. 



Lateral sepals linear-lanceolate, recurved, connate at the extreme 

 base; dorsal sepal spathulate-acuuiinate, more or less incurved 

 over column and about same length as lateral sepals. Lateral 

 petals spreading, lanceolate, much wider, but about same length 

 as lateral sepals. Labellum oblong, quite rounded at tip, on a 

 very short moveable articulation, rather shorter than lateral 

 sepals, slightly recurved about the middle of lamina. Calli dark- 

 purple distributed as follows : — (1) One large crescentic sessile 

 callus in middle line in advance of all the others; (2) a large 

 bilobed stalked callus about midway between this and base of 

 lamina; (3) numerous stalked calli, small and medium sized, be- 

 tween (1) and (2); (4) a somewhat irregular row of small stalked 

 calli running on either side of the middle line from the bend in the 

 lamina to its base. Column shorter than dorsal sepal, winged 

 especially in its upper part, the wings being produced into two 

 short falcate processes above and behind the anther; anther blunt, 

 situated on apex of column immediately above the circular stigma, 

 as in a Caladenia. 



The genus Chiloglottis includes six recorded Austi-alian species, 

 four of which have been described by the late R. D. Fitzgerald. 

 One of the latter occurs also in New Zealand and another in- 

 digenous species is also recorded from those islands. 



The new species is very distinctive and the shape of the label- 

 lum alone readily distinguishes it from all others. 



The following analytical table Avill differentiate it from other 

 Australian members of the genus. 



