196 THE TASMANIAN FLORA. 



then sharply recurved on itself, very broad, with a pulvinate centre and a 

 spreading coarsely denticulate margin. 



Very common in damp situations ; also throughout extra-tropical Australia. 

 Doubtfully distinct from C.Jimbriata, R. Br. Fl. all the year. 



3. C. DIEMENICA, Lind. Very similar to the last, but smaller. Flower about 

 \ inch, the dorsal segment rather narrow, green, spotted with dark red. 

 Labellum exceeding the dorsal sepal, not as closely recurved as in C. pruinosa, 

 the pulvinate centre yellow and pubescent, the margin incurved and minutely 

 denticulate. 



Very common in numerous situations ; also Southern Australia. Fl. 

 Jun.-Dec. 



4. 0. BiCALCARATA, R. Br. Leaf membranous, dark red below, about 1 inch 

 diameter. Flower-stalk about I inch long, bearing a small linear bract near the 

 base, the stalk, bract, and flower very dark red. Dorsal segment over-arching, 

 very convex, acute, the apex usually, but not always, upturned, about f inch 

 long. Labellum very much smaller, the tubular base rather long, and extended 

 below into 2 horn-like auricles that appear conspicuous in front of the stem, 

 expanded portion narrow, about 3 lines diameter, with a plain recurved 

 margin. Column narrowly but distinctly winged, and bearing a thick cushion 

 at its anterior base. 



Near George's Bay. It also occurs in New South Wales and Queensland, 

 Fl. May. 



14. PTEROSTYLIS. 



Three upper perianth-segments adhering, and forming an over-arching hood ; 

 two lower segments connate at the base, erect or recurved. Labellum ovate to 

 linear, thickened, or filiform and clothed with hairs, bearing a basal, linear, 

 usually penicillate, process, articulated on a slender, flat, irritable stalk. Column 

 erect, rather slender, bearing a pair of somewhat hatchet-shaped wings near the- 

 apex. Anther valvular. 



The genus is principally Australian, but extends to New Caledonia and New 

 Zealand. 



Lower perianth-lobes erect, the tips embracing the 

 upper ones. 

 Leaves in a rosette round the base of the stem. 

 Tips of lower lobes long and slender. 

 Labellum bifid ... 



Labellum oblong. Stem pubescent . . . 

 Labellum ovate. Stem glabrous 

 Tips of lower lobes shorter than the upper ones 

 Flower erect 

 Flower nodding .. . 

 Leaves dispersed on the stem or none. 

 Leaves or bracts large. 



Bracts large, spathe-like 6. P. cucuUata. 



Bracts leafy, the lowest largest .. ... 7. P furcata. 



Bracts small. Leaves on separate stems or none. 

 Flowers solitary. Tips of lobes long and 

 slender. 

 Labellum tapering to an acute point ... 8. P. preecox. 



Labellum oblong-linear, nearly obtuse ... 9. ^. obtusa. 

 Flowers usually 2 or more together. Lobes 

 rather obtuse. 



Labellum oblong 10. P. parviflora 



Labellum ellipsoid 11. P. aphy'lla. 



1. P. concinna. 

 5. P. nana. 



4. P. pedunculata.. 



2. P. curta. 



3. P. nutans. 



