no 



a contribution to the orchidaceous flora of 

 Papua (British New Guinea^. 



By R. S. Rogers, M.A., M.D. and C. T. White, F.L.S. 



[Read June 10, 1920.] 



Plates V. to VIII, 



During July and August, 1918, one of us (C. T. W.), 

 through the kind invitation of H. E. the Hon. J. H. P. 

 Murray, spent five weeks botanizing in the territory of Papua. 

 Owing to the pressure of other matters the work of identify- 

 ing and describing the material gathered has been somewhat 

 delayed, but is noxv nearing completion and the examination 

 of several families has been kindly undertaken by various 

 specialists in England and Australia. Only a few orchids 

 were collected; as a general rule this family is ^^ery strongly 

 represented in Papuan collections, but the trip undertaken 

 was of a very hurried nature and the localities visited did not 

 seem particularly rich in orchids; as the area, however, from 

 which the material was obtained has not to our knov/ledge 

 been previously collected over, most of the specimens represent 

 what appear to us previously undescribed forms. All were 

 gathered in the mountainous country between Dilava and 

 Mafula at an elevation of 3 to 4,000 ft. and about sixty miles 

 inland from Yule Island on the Southern coast. 



Physurus bicalcaratus, n. sp. 



PI. Y. 



Planta + 34 cm. alta; foliis prope a basi, 3 vel 4, ellipticis 

 vel oblongo-ellipticis, acuminatus, integris, glabris, 3-4 

 nervosis, lamina 3 cm. -9*5 cm. longa et 1 •5-3*3 cm. lata, 

 petiolis (cum vaginis) 2'3 cm. -3 cm. longis basi vagini- 

 formibus dilatatis; caule fer© glabro leviter pubescenti, 

 bracteis circiter 2 acuminatis pilosis ; spica + 14 cm. alta, 

 floribus circiter 12 sessilibus remotis, rhache bracteis et 

 floribus extus hispidulis; ovario subgracili, + mm. longo, 

 tortissimo ;, sepalo dorsali anguste cucullato, erecto, 3-ner- 

 voso, + 7 mm. longo ; sepalis lateralibus liberis, labello 

 obliqui suppositis, falco-lanceolatis, 3 -nervosis, + 8 mm. 

 longis; petalis lateralibus sepalo dorsali aequantibus et 

 cum eo in galeam conniventibus, apicibus cohaerentibus, 

 membranaceis, lineari-falcatis, 1 -nervosis; labello inferne, 

 sessile, a basi columnae breviter adnato, ab apice calcaris 



