nORN EXPEDITION — ROTANV. 185 



II DiPLACiiNE LOLiiFORMis, F. V. M. Botweoii Alice Sprin<Ts ixiid Charlotte 

 Waters (C Giles), as at Mount Squire near Engoordina !. 



II DiPLACiiNE FUSCA, PiiHsot. River Fiuke at Fiuke Gorge and Jieiil)ury !, 

 also River Stevenson !. 



Tkiodia pungens, R. Broivn. The chief vegetation of the rocky tablelands 

 and hill slopes. 



TiiiODiA irritans, R. Brfl7vn. Ubiquitous (Kenipe). Also sandhills as far 

 north as Macumba !. 



The porcupine grass was seen rarely in flower, and then always with the floral 

 characters and viscid leaf-sheaths of T. pungens ; if one may judge of the species by 

 the pi'esence or absence of a viscid exudation, then the ubiquitous species is 

 T. pungens and not T. irritans ; indeed I have not observed T. irritans as a 

 saxatile species, if at all, even in the Larapintine region. Beuthani in Fl. Aust., 

 vol. \ii., pp. 006 and 607, indicates T. pungens as a more nt)rtheru species 

 than T. irritans, whilst the latter is " probably the ' porcupine gi'asses ' of the 

 southern interior deserts of Australia ;" my observations ai"e in accord therewitli, 

 and I am afraid that Mr. Kempe's determination is in the main, at least, incorrect. 

 The young leaves in life are flat and copiously covered with a varnish, which for 

 its tenacious adhesiveness may lie compared to copal varnish ; on drying the leaves 

 roll up into a cylinder, and with age the same thing happens concuri'cntly with the 

 disappearance of the viscid exudation from the surface of the leaves, though some 

 may be retained on the less exposed leaf-sheaths. 



Triodia sp. (? T. Mitciielli, Bentham). " Old-man porcupine." Forming 

 exceedingly large tussocks, up to eight feet high and twelve feet diameter, foliage 

 of a dull ashen grey ; flowers not seen. Tempe Downs, Rudall Creek by Mereenie 

 Blufl', under INlount Bonder !, Palmer River (Spencer). 



li Eragrcstis tenella, Palisot. ]\lcDonnell Range and Charlotte Waters 

 (C. Giles). Henbury, Running Water and Reedy Creek !; also Stevenson River ! 

 (Stuart) and Giddea Creek near Oodiiadatta !. 



Eragrostis triciiophylla, Bentlmni. No locality (Tietkens). 



Era(;rosti.s diaxdra, Steudel. Glen Helen (Tietkens); Carmichael Creek!. 



II Eragrcstis Brownii, Nees. Hermann.sburg (Kempe). 



Eragrostis speciosa, Steudel. Running Water by Ijanks of Finke River!; 

 also at the Goyder Ri\er ! and Hamilton River (Stuart). ^^ 



