359 



ADDITIONS TO AUSTRALIAN ORCHIDACEOUS PLANTS. 



By R. S. Rogers, M.A., M.D. 



[Read October 8, 1914.] 

 Plate XVIII. 



Caladenia Bryceana, sp. nov. 



This interesting little Caladenia was found by Miss Bryce 

 Maclntyre at Gnowangerup, Western Australia, early in 

 September. She states that it was growing in sandy soil near 

 the bank of a salt pool. 



Description : — 



Plant diminutive (my specimens \\ inches), very hairy, 

 leaf broadly lanceolate; two hairy, lanceolate bracts about 

 ^-inch long on the upper part of the stem a little below the 

 ovary. 



Flower single, rather more than \ inch in length, 

 segments of perianth greenish. Dorsal sepal hairy, spathu- 

 late, incurved over, and about the same length as the column. 

 Lateral sepals rather widely crescentic, ecaudate, about as 

 long as the dorsal sepal. Lateral petals linear-lanceolate, 

 approximating in length to the sepals. Labellum freely move- 

 able on a rather long claw; margins entire; with wide green 

 lateral lobes; middle lobe (tip) short, blunt, triangular, 

 studded with dark reddish-purple glands, recurved and then 

 reduplicated on itself so as to form a sigmoid flexure; upper- 

 surface of lamina convex, renif orm ; lower-surface concave ; 

 calli dark reddish-brown, stalked, standing up conspicuously 

 from surface of lamina in four dense rows and reaching almost 

 to the tip ; on the claw near the. base of the lamina is a large 

 conspicuous, purplish-green, clavate, bilobed process. The 

 column is much incurved, with large hatchet-shaped wings 

 resembling those in genus Pterostylis; greenish, with reddish 

 dots on anterior surface except at the base, where there is a 

 small depression into which fits the head of the bilobed process 

 when the labellum is raised; anther quite blunt, overhanging 

 the stigma. 



The two yellow glands so commonly found at the base of 

 the colmun in Caladenia are not present in this species. 



Caladenia Bryceana is so characteristic that it is un- 

 likely to be mistaken for other members of the genus. It 

 finds its place within Bentham's section Calonema, and is most 



