45 



species of Salsolacese, notably Atriplex nummularium (" Cab- 

 bage salt-busb"), A. semibaccatum and Bassia salsuginosa, 

 Epaltes australis, Senecio Cunniughami, Heliebrysum lucidum, 

 Exocarpos stricta, Limosella aquatica, Griossostigma, G-ratiola, 

 twosp,, StemodiaMorgania, Eremopliila divaricata, Cjperaceae,. 

 species of Panicum, Andropogon, Eragrostis, &c., Marsilea 

 quadrifolia. 



(c) Cliffs at tbe water line: — Swainsonia Grejana, Wablen- 

 bergia, Aspidium molle, also stragglers from the alluvial tracts- 

 Some of tbe above-named species are more or less restricted 

 to one or tbe otber section of tbe river, tbus : — 



rPPER SECTION. 



LOWER SECTiox. Gljcjrrbiza psolaroides 



Limnantberaum exaltatum L. crenatum 



Gratiola Peruviana Gr. pedunculata 



Aspidium molle Ottelia ovalifolia 



Azolla rubra A. pinnata 



II. TABLE LAND OE MURRAY DESERT OF THE LOWER SECTIOX. 



On tbe wevstern side of tbe river, as far nortb as Morgan, 

 tbe surface of tbe plateau is more or less stony (rubbly traver- 

 tine) and covered witb mallee scrub ; but on tbe eastern and 

 northern sides tbe oyster banks are succeeded by clays, and 

 tbese at bigber levels by sands. In accordance witb tbese 

 different petrological features so tbe prevailing floral 

 characters vary. The greatest number of species occurs alon^ 

 the trail of the sand over tbe underlying clays as might be 

 expected from bygrometric conditions ; here, also, exist the 

 *' native wells." 



(a) ^tony Surfaces. — Tbe constituents of tbe '''mallee scrub," 

 in tbe open parts of which prevail Casuarina siiherosa, many 

 shrubby Asters, Acacias, Cassias, Templetonia egena, and 

 G-revillea Huegelii ; and during early spring many humble 

 annuals appear in considerable profusion, such as Alyssum, 

 Erysimum, composites, Goodenias, Bromus arenarius. 



(h) Clay Surfaces. — Tbe mallee scrub of the stony surfaces 

 is interspersed with glades, which occupy clay depressions 

 on which water remains for some time after heavy rains. Here 

 the mallee does not grow, from which we may infer that its 

 seed cannot withstand prolonged immersion in water. This is, 

 however, the favourite habitat of JSlyo-porum flaytycar-pum, so- 

 called " sandal wood." Tbe vegetation on the lacustrine clays 

 is the same as that of the glades, and its chief constituents are 

 the better kinds of fodder plants, Ehagodias, Kochias, Lycium, 

 Dodonsea spp., Tetragonia expansa. 



