THE TASMANIAN FLORA. 191 



,4 D. SULPHUREA, R. Br. Tall and robust, stems often 2 feet high. Leaves 

 long, narrow, linear, sheathing, usually 1 or 2, and 1 or 2 reduced to bracts above 

 them Flowers larger than in previous forms, sulphur-yellow with few spots of 

 dark purple. Over-arching segment about f inch long, ovate, acute, usually, with 

 1 large round spot on each side. Reflexed segments about 1 inch long, the 

 linear lower pair about the same length. Labellum rather shorter than the 

 upper segment, the central lobe rhomboid ; lateral lobes short, obovoid. 



Very common, chiefly in heathy land. It occurs in New South Wales, Victoria, 

 and South Australia. PL Oct.-Nov. 



5. D. LONGiFOLiA, R. Br. A plant about as tall and robust as the last. Leaves 

 long, sheathing, narrow-linear, but broader than in D. mlphurea, usually 2 or 3, 

 the upper one partially bract-like. Flowers usually 3 or 4, yellow^ marked with 

 a paler colour than the allies, and hardly spotted. Over-arching segment short 

 and very broad ; linear lower ones about 1 inch long, usually crossing. Labellum 

 about \ inch long, the middle lobe very truncated, lateral lobes broadly obovate 

 and nearly as long as the middle one. D. corymbosa. Hook. 



Common in the north and north-east ; also in Victoria, South Australia and 

 West Australia. Fl. Oct. 



9. 0RTH0CERA8. 



Segments of the outer series : upper one erect, convex over the column, lower 

 pair narrow-linear, very long ; inner series : upper pair small and hidden. 

 LabelluTn .S-lobed, the central one exceeding the others, a hemispherical eminence 

 developed near the base. Column very short ; the lateral lobes linear free. 

 Anther erect, valvular. 



The genus contains but one species, and is confined to Australian and New 

 Zealand distribution. 



0. STRiCTUM, JR. Br. Stem tall, 1-2 feet high. Leaves usually 3 or 4, 

 sheathing, linear, passing above into the bracts. Flowers usually many, in a 

 loose spike, each flower erect and subtended by a large bi'act, usually slate- 

 colonred in Tasmanian specimens, or greenish, but varying to brown-purple or 

 yellow. Upper- segment and labellum about \ inch long ; the lower linear 

 segments very slender, erect, 1-1| inch long. 



Near George's Bay, near Trial Harbour, West Coast. It occurs also in New 

 Sonth Wales, Victoria, and South Australia ; also in New Zealand. Fl. Jan. 



10. CRTPTOSTTLIS. 



Flowers inverted. Perianth-segments all narrow-linear. Labellum exceeding 

 the other segments, oblong, broad, sheathing the column at the base. Column 

 very short, with short, broad, connate, irregular, lateral lobes. Anther 

 valvular, rather shorter than the rostellum. 



A small genus, confined to the East Indies and Australia. 



C. LONGIFOLIA, R. Br. Stem slender, erect, mostly about 1 foot high, arising 

 from a thickened rootstock. Leaves 1-3, inserted at the head of the rootstock 

 ovate-lanceolate, 2-4 inches long, contracted below into a stalk about half as long 

 as the lamina. Flowers few, in a terminal raceme, purple-brown, the linear 

 perianth-segments about f inch long. Labellum about 1 inch long, oblong, the 

 margin and apex recurved, with 2 thickened longitudinal lines in the centre, and 

 a thickened crest near the end. 



Bellerive, Bruni Island, Oyster Cove, Huon, Southport, Circular Head and 

 many other localities in the north. Principally in damp heathy country ; also 

 .throughout Eastern Australia. Fl. Dec. 



11. PRASOPHYLLUM. 



Flowers inverted. Outer series of perianth-segments herbaceous, the lower 

 one ovate, concave below the column, the upper pair narrower, erect, often 



