148 



Contributions to the orchidology of Australia 

 AND New Zealand. 



By R. S. Rogers, M.A., M.D. 



[Read July 13, 1922.] 



I. Additions. 



Diuris brevifolia, n. sp. Planta gracilis, glabra, cir- 

 cit^r 15-40 cm. alta. Folia 4-8, linearia v. setacea, acum- 

 inata, non torta, erecta, 7-12 cm. longa. Flores 1-4, laxe 

 racemosi, lutei oum notationibus bruneis paucis. Sepalum 

 dorsal© ovatum, recurvum, circiter 15 mm. longum ; sepala 

 lateralia herbacea, linearia, acuminata, parallela, patentia. 

 Petala breviter petiolata, circiter 14 mm. longa, lamina 

 elliptica. Labellum sepalo dorsali aequale aut paulo lon^iore; 

 lobus intermedius rhombo-cuneatus, basi intus carina 

 duplici, lateralibus plus quam duplo longior. 



Slender, glabrous; leaves generally 4-8, linear or 

 setaceous, acuminate, not twisted, very erect, rarely reaching 

 beyond the middle of the stem. Flowers solitary, or in a loose 

 raceme of 2-4, on slender pedicels, yellow with a few brown 

 markings, much smaller than those of T). sulphurea. Dorsal 

 sepal ovate, recurved; yellow with two dark-brown spots on 

 the dorsum, one on each side of the base. Lateral sepals 

 much longer, green, linear, parallel, spreading below the 

 labellum or slightly recurved. Petals nearly as long as tlie 

 lateral sepals, shortly stalked, spreading or recurved ; lamina 

 a canary-yellow, elliptical, about 11 mm. long. Labellum 

 yellow, at least as long as the dorsal sepal and generally 

 longer ; lateral lobes less than half as long as the central 

 lobe, generally about 5 mm., not very wide, margins entire, 

 tips recurved ; middle lobe rhombo-cuneate with depressed 

 antero-lateral margins; lamina with two closely approximated 

 parallel raised lines on the basal half continuous with the 

 anterior central keel, the lines surrounded by a conspicuous 

 dark-brown border. Anther without a definite point, rather 

 higher than the viscid disk of the rostellum. Lateral 

 appendages of the column subulate or linear-falcate, about 

 the same height as the viscid disk. 



South Anstralia : Longwood and other parts of the Mount 

 Lofty Range ; Myponga ; Mount Compass ; Port Elliot ; 

 Kangaroo Island. November-December. 



This plant has long been confused with D. Hnlphu^rea, 

 which it superficially resembles, but from which it dijffers 



