131 



Key to the Species of Caladexia (Sect. Piilebociiilus;. 

 Labellum-margin entire. 



Calli in two rows ; labellum orbicular, shortly stalked ; 



sepals lanceolate shortly acuminate. Cairusiana* 



Calli crowded, lower ones connate ; labellum broadly ovate 



or rhomboidal, long-stalked ; sepals lanceolate, tapering- 



into long fine points. multidavia. 



Labellum-margin ciliated, toothed or serrate. 



Labellum ciliate-fringed, broadly ovate or orbicular. 



Calli crowded ; labellum contracted at the base ; 

 sepals subulate-acuminate. discoidea. 



Calli in four rows ; labellum short-stalked ; sepals- 

 lanceolate, shortly-acuminate. reticulata. 

 Labellum toothed or crenate, 



Calli in two rows ; labellum narrow ovate-rhomboid, 

 sessile, bluntly serrate ; sepals subulate-acuminate. 



tentacidata, 

 Calli crowded or in four rows ; labellum crescent- 

 shaped with a short lanceolate middle lobe, on a long^ 

 stalk, toothed ; sepals narrow-lancoolate. toxochila. 

 Schoenus discifer.f 

 Dwarf, densely tufted perennial. Leaves radical, linear, erect, 

 flat, longitudinally veined, under two inches long ; leaf-sheaths 

 short, membranous, reddish-]3rown, neither bearded nor pointed. 

 Stem solitary, about one inch ; spikelet two and a half to three 

 lines long, solitary, terminal, erect, sessile, ovate-lanceolate, pale- 

 coloured ; the erect leafy involucral bract continuing the stem, 

 about one inch long. 



Flowers about three in each spikelet, the two lower ones fer- 

 tile ; glumes glossy, straw-coloured, membranous, with a promi- 

 nent green keel, acute ; hypogynous bristles absent ; stamens 

 three, as long as the style ; style-branches three. Nut ovoid, 

 three-ribbed, smooth, black, with white streaks and blotches, or 

 white mottled witli black, raised on a bluntly triangular lamelli- 

 form disk. 



Wet heath-ground, Central Dudley Peninsula, Kangaroo Island 

 {R.T., November, 1883). 



This species belong to the Section Oligostachyte of Bentham's 

 arrangement in the Fl. Austral., and is related through its 

 hypogynous disk to the leafless S. minutidus. In habit it resem- 

 bles *S'. Tepperi, but is distinguished by its flat and veined leaves, 

 by its two fertile flowers, and by its smooth ovoid disk-bearing nut. 



* Since describing C. cardiocJiila, certain discrepancies in the diagnosis of 

 C. Cairnsiana given in the Fl, Australiensis have been cleared away by refer- 

 ence to the original description ; and it seems probable that the former name is 

 synonymous with the ktter. 



t Havmg a disk. 



