DendrMwn.] CXXVII. ORCHIDE^. 1525 



middle, obtuse, the dorsal one 4 or 5 lines broad at the base, the lateral ones 

 broader, extending down and covering the rather pointed straight spur formed 

 from the base of the column and labellum. Petals about as long as the sepals 

 obtuse, narrower, and tapering much towards the base, faintly lined with violet, 

 and frequently but not always curled. Labellum about the same length as the 

 other segments but much broader, the lateral lobes erect, stained with violet, 

 and marked by violet-coloured forked veins, embracing the column, middle-lobe 

 small and scarcely separated from the others, obtuse, emarginate, or sometimes 

 apiculate, the margins undulate ; the disk with 8 strong dark violet-coloured 

 plates with entire margins ending abruptly at the base of the middle-lobe. 

 Column of medium length, violet stained at the base, more or less arched, with 

 thick wings. Anthers flat, not prominent ; pollen-masses coherent. 



Hab.: Creek off the Johnstone River, A. G. Tofft. 



This superb species approaches D. undulatmii in habit and form of leaves. The stems, 

 however, are much more compressed, and the flowers are very different in both form and colour. 

 In the dark-coloured ribs of the stem it resembles Z>. Jtihannis. 



5. S. undulatum (undulate), 7J. Br. Prod. 332 ; Benth. Fl. Ausir. vi. 

 278. A stout species growing in large tufts and attaining with the racemes 

 several ft., the stems often swollen in the middle. Leaves bifarious, ovate or 

 elliptical, obtuse or emarginate, 2 to 4in. long, flat but thick and somewhat 

 undulate or the margins recurved. Eacemes from the upper part of the stem 

 often above lift, long, the flowers numerous, rather large, on pedicels often 

 exceeding lin. Bracts lanceolate or linear-lanceolate. Sepals and petals nearly 

 similar, spreading, linear-oblong, obtuse, very much undulate, of a dingy brown 

 usually bordered with yellow, about lin. long, the short broad basal pouch ending 

 in a short curved or straight obtuse spur. Labellum shorter than the sepals, 

 the lateral lobes large, erect, nearly flat, the middle lobe small, broadly lanceolate 

 or oblong, recurved and undulate ; the disk with 5 raised lines or plates of a light 

 violet colour, of which 2 more prominent especially near the base and sometimes 

 7 immediately below the middle lobe. Column short. — Lindl. Gen. and Sp. 

 Orch. 27; Eeichb. f. in Walp. Ann. vi. 298, Beitr. 47; F. v. M. Fragm. i. 87; 

 D. discolor, Lindl. Bot. Eeg. 1841, t. 52 ; Fitzg. Austr. Orch. ii. PI. 8. 



Hab.: Endeavour Eiver and many other places along the coast, Banks and Solaiider, 7>. Broicn, 

 A. Cunningham; Port Curtis, ili'GiZtoi'a)/ ; Curtis Island, T/tozet ; KookinghamBay, J. iinJ/ac/jy ; 

 Port Denison, E. FUzalan ; Cape York, Daemel ; Albany Island, A. G. Gregory ; und New 

 Guinea. 



Var. BroomfiehUi, Fitzg. Austr. Orch. Pt. 3, only differs in colour of flowers, \»hich is a 

 canary yellow, and in the more angular stem. 

 Hab.: Bowen. 



6. I>. Johannis (after John Veitch), Eeichb. f. in Gard. C'hroit. 1865, 

 890 ; Xen. Orch. ii. 165 ; Benth. Fl. Austr. vi. 279. Stems tufted from a 

 shortly creeping rhizome, always more or less fusiform above the bulbous base, 

 usually 7in. or more high, the internodes short and deeply corrugated the ridges 

 purple lined. Leaves narrow, thick, 4 to 6in. long, seldom more than ^m. 

 broad, tapering from the base to a sharp point, 2 to 5 to each stem, often distant. 

 Peduncle with raceme 8 to lOin. longj very slender and usually purplish. 

 Bracts minute, membranous, the lower ones closely clasping the peduncle, those 

 subtending the flowers spreading and more acuminate. Pedicels very slender 

 about lin. long. The segments all more or less twisted. Sepals brown with a 

 jellowish tint, 8 to 9 lines long, 1^ line broad, linear, obtuse at the end, marked 

 with longitudinal darkish red lines. Petals somewhat greenish, similar to 

 the sepals but rather darker, shorter and narrower. Labellum 3-lobed, 

 scarcely more than half the length of the sepals; lateral lobes oblong 

 deep-red with very oblique deeper-red veins, middle-lobe triangular, acute, 

 sulphur-coloured. Disk with 3 prominent lines of calli continued down between 



