1564 CXXVII. OECHIDEiE. [Diuris, 



Labellum 3-partite (the lateral lobes divided to the base), with 2 longi- 

 tudinal raised lines on the middle lobe. 

 Lateral sepals usually much longer than the petals. 



' Flowers white I. !>■ alha. 



Flowers bluish purple 2. X>. punctata. 



Flowers secund, most part yellow 3. D. secundiflora. 



Lateral sepals usually scarcely longer than the petals. Flowers yellow, 



often spotted or blotched with purple 4. Z>. aurea. 



Labellum 3-fid (the lateral lobes separating from above the base) with 2 

 londitudinal raised lines on the middle lobe. 

 Raised longitudinal lines on the labellum at some distance apart. 



Lateral lobes of the labellum as long as or more than half as long as the 

 middle lobe. Dorsal sepal usually as long as the labellum. 



Lateral sepals scarcely so long as the petals 5. D. maculata. 



Lateral lobes of the labellum less than halt as long as the middle lobe. 

 Dorsal sepal usually shorter than the labellum. 



Raised longitudinal lines of the labellum pubescent 6. D.pediinculata^ 



Raised longitudinal lines crenulate or cristate 7. Xi. fallens. 



Raised longitudinal lines glabrous and smooth 8. D. abireviata. 



Labellum 8-partite (the lateral lobes much shorter than the middle lobe, 

 divided off from the base) with a single raised longitudinal centre 

 not furrowed. 

 Flowers yellow often with purple spots 9. D. sidphurea, 



1. B. alba (white), R. Br. Prod. 316 ; Benth. Fl. Austr. vi. 325. A rather 

 slender species, under or above 1ft. high, exceedingly difficult in the dried state 

 to distinguish from the small flowered specimens of D. punctata. Leaves usually 

 narrower and one of them often nearly as long as the stem below th& 

 inflorescence, but sometimes all shorter. Flowers white with a few dark spots 

 inside, the proportions and shape of the parts the same as in Z). 'punctata but all 

 smaller. Lateral sepals 1 to IJin. long; petals about ■Jin. ; dorsal sepal and 

 labellum nearly equal in length and shorter than the petals. Lateral lobes of 

 the column more frequently dentate than in D. punctata, but variable. — Lindl. 

 Gen. and Sp. Orch. 509 ; Eeichb. f. Beitr. 13. 



Hab.: Port Bowen" and Shoalwater passage, R. Brown; Brisbane River, Morelon Bay, A^ 

 Cunningham ; Rockhamptou and vicinity, Bowman, Tliozet, O'Shanesy ; Darling Downs, Law .- 

 Wide Bay, Bidwill ; Broadsound, Bowman; Rockingham Bay, Dallachy. 



2. S, punctata (punctate), Sm. Exot. Bot. i. 13, t. 8 ; Benth. Fl. Anstr. vi. 

 326. Stems 1 to 2ft. high or even more. Leaves 1 or 2, linear, 3 to 13in. 

 long, with 2 empty sheathing bracts above them. Flowers 2 to 5, blue or 

 purplish, often dotted but not blotched like several of the yellow species (the 

 Nerang form lilac thin making F. v. M.'s name lilacina appropriate to this 

 form), the acuminate bracts often but not always exceeding the ovary. Dorsal 

 sepal in the typical form broadly ovate-oblong, 7 to 8 lines long ; lateral 

 sepals deflexed, very narrow, nearly 2in. long. Petals broadly elliptical-oblong, 

 nearly lin. long including a claw of about 2 lines. Labellum about as long 

 as the dorsal sepal, divided at the base into 3 lobes, the niiddle-lobe obovate- 

 oblong, the lateral lobes about one-third as long, oblong-falcate, varying in 

 breadth, entire or crenulate ; disk of the middle loi)e with 8 longitudinal raised 

 lines or plates starting from the base ; the 2 lateral ones ending somewhat 

 abruptly and sometimes forming an acute tooth below the middle of the lobe,. 

 the central one not so prominent or obscure at the base, but continued 

 further along the lamina. Lateral lobes of the column as long as the anther, 

 lanceolate with undulate magins, more or less distinctly 1-nerved. Anther 

 shortly acuminate, 2 lines long. Rostellum short, bifid. Wings of the column 

 very shortly produced at the base in front, not meeting as in Thelymitra, but 

 often continuous with the raised lines of the labellum. — D. elongata, Sw. in 

 Schrad. Neu. Journ. i. 59 ; R. Br. Prod. 316 ; Lindl. Gen. and Sp. Orch. 

 509; Eeichb. f. Beitr. 13; B. lilacina, F. v. M. in Linnsea, xxvi. 239. 



Hab.: Nerang Creek, H, Schneider ; North Coast Railway. 



