HITHERTO UNDESCRIBED PLANTS FROM ARNHEIM's LAND. 79 



at the margin ; umbels axillary, containing several or only few 

 flowers ; peduncles thin, about as long as the pedicels or even 

 shorter ; calyx small, its divisions almost semilanceolar ; corolla 

 dull-coloured, its segments much elongated, from a semi-lanceolar 

 base filiform-linear, very much exceeding the calyx, at the inner 

 side particularly downward beset with white papillular hairlets ; 

 coronular lobes dark-coloured, erect, rounded-blunt, slightly turgid; 

 pollinia purplish-black ; ovularies slender, glabrous. 



Root to 2 inches long. Stem to 3 feet long. Leaves towards 

 the middle of the stem often about 2 inches long, but less than J- 

 inch broad. Pedicels J — \ inch long. Corolla when fully 

 developed measuring nearly 1 inch in length. Stamens about -fa 

 inch long ; terminating membranule of the anthers very short. 

 Fruit not obtained. 



This plant is singularly different from all its congeners in the 

 extreme narrowness of the leaves and in the length and slender- 

 ness of the corolla-segments, the latter reminding of those of 

 Calostigma insigne. 



The dedication is to Dr. A. Leibius, f.c.s., who through many 

 years was one of the Hon. Secretaries of the Royal Society of 

 N.S.W., and who at present occupies the distinguished presidential 

 position of that eldest of Australian Science-unions. 



HOYA AUSTRALIS. 



R. Brown according to Traill in the Transact, of the Horticultural 

 Society vu., 28. 

 Creeping over rocks near the sea-shore. Not previously traced 

 to N.-W. Australia. 



As stated in the report on the Burdekin-Expedition, this species 

 is often beset with minute hairlets. Mr. Holtze has succeeded in 

 finding also the fruit ; its characteristics are the following : Peri- 

 carp about 6 inches long, when flattened out nearly | inch broad 

 at the middle, gradually acuminated, inside and outside glabrous. 

 Placentary less than ^ inch broad. Seeds numerous, glabrous, 

 pale-brownish, hardly more than \ inch long, narrow-elliptical, 

 but attenuated upwards and truncate at the summit. Tuft of 

 hairlets attaining a length of one inch, white. 



(To be Continued.) 



