EXPLORING EXPEDITION. 79 



GRAMINEAE. 



Panicum deeompositum, R. Brown. Glen Helen 



Andropogon bombycinus, R. Brown. Mount Razorback 



Pappopborum commune, F. v. M. Ayers' Rock 



Sporobolus actinocladus, F. v. M. Glen Helen 



Dantbonia bipartita, F. v. M. A variety witb often only one fertile flower in 



tbe spikelet 

 Eleusine cruciata, Lamarck. S. shore of Lake Macdonald ; Mount Conner 

 Eragrostis diandra, R. Brown. Glen Helen 



RHIZOSPERMAE. 



Marsilea guadrivalvis, Linne. Mount Sonder 



FILICES. 



Ophioglossum vulgatum, C. Baubin. Plains S.W. of Erldunda 



Cbeilantbes vellea, F. v. M. Mount Sonder 



Cbeilantbes tenuifolia, Swartz. Bond Spring; Mount Sonder ; Glen Helen ; 



Laura Vale ; Mount Leisler ; Mount Olga 

 Grammitis rutaefolia, R Brown. Mount Connor 



DESCRIPTIONS OF NEW SPECIES. 



By Baron Sir F. von Mueller and Professor R. Tate. 



Eeiostemon argyreus, F. v. M. and Tate. 



Very lepidote all over, with narrow or elliptic-lanceolar leaves, but gathered 

 -without any flowers or fruits. Allied to E. anceps as far as foliage is concerned. 

 Central Australia. 



Sida podopetala, F. v. M. and Tate. 



Extensively bearing a close but short indumentum ; leaves rather small, on 

 short petioles, from orbicular to lanceolar-ovate, irregularly denticulated except 

 towards the base ; stipules linear-filiform, early deciduous ; penduncles mostly 

 axillary and solitary, articulated near the flower, as long as the latter ; calyx 

 comparatively large, its lobes deltoid, shorter than the tube or nearly as long; 

 the latter semiovate or finally almost semiglobular, faintly many-streaked; 

 petals yellow, nearly equilateral, by about one-third longer than the calyx, 

 slightly bilobed, the upper half much dilated, the lower half cuneated, and to 

 wards the base densely ciliolated ; staminal tube short ; styles numerous, only 

 connate near the base ; ovularies much beset with very short hairlets, con- 

 nected into a much depressed mass, and this surrounded by a conspicuous, 

 somewhat crenulated disk. Central Australia. 



This plant has the aspect of an Abutilon, but its ovularies are uniovulate. 

 The width of the expanded flowers is somewhat more than an inch. Tbe form 

 of the petals is rather exceptional in the genus, they being somewhat suddenly 

 contracted into the long, almost stalk-like basil portion. 



This species differs from S. cleisocalyx in broader and pointed leaves, in longer 

 peduncles, and in organization of the flowers, though S. cleisocalyx may be 

 dimorphous and is known to us as yet in the clandestinely flowering state only ; 

 the fruits of the two may also be different. From S. platycalyx our new plant 

 is separated by narrower leaves, by the calyces being not provided with very 

 prominent ridglets, and further by the petals emerging beyond the calyx. 



