TOPOGRAPHICAL, ECOLOGICAL, AND TAXONOM1C NOTES. 353 



folia typica. In the centre of the depression, Cupaniopsis 

 anacardioides Radlk. is a shrub of four to six feet, but as 

 it retreats down the sheltered rearward slope of the dune 

 embankment it increases in height, until on reaching the 

 flat at the base of the slope it has attained its normal 

 arboreal growth. 



On the rocky ledges of the escarpment on the headland 

 near Port Hacking, the exposure has again reduced it to a 

 shrub. The fragrant flowered Coast Mignonette, Stack- 

 honsia spathulata Sieb., a prostrate succulent herb, creeps 

 out of the valley to the verge of the frontal embankment. 

 This species is doubtfully recorded by Bentham (PI. Austr. 

 i, 406) from the grasslands of the interior, but, as he sug- 

 gests, it has doubtless been confused with S. tnonogyna 

 Labill., which is common in grazing country throughout 

 the State. It is not represented in the National Herbarium 

 from any station other than the coastal beaches. 



On the rearward slope of the embankment in the shelter 

 of the arboretum of Cupaniopsis anacardioides, and Banksia 

 integrifolia, several shade loving species are established, 

 of which Vitis clematidea F.v.M., a tendril climber, and 

 Solatium pungetium R. Br., a trailer, are typical represen- 

 tatives. The introduced Oenothera longiflora Jacq., has 

 found in the loose sandy soil a suitable habitat, and has 

 spread in close ranks along the unoccupied ridges. 



On the headland south of Cronulla Beach the hardy 

 Monotoca scoparia R. Br. mingles sparsely with the shrubs 

 on the rocky hillside, and the herbaceous Goodenia hetero- 

 phylla Sm., sends up straggling stems in the open spaces. 

 The xerophytic Trachymene Stephensonii Turcz., does not 

 discard its leaves in this situation, to the same extent as 

 when growing in the shallow soil on rock benches in the 

 flat ill-drained country near Botany, the centre of its 

 activity. 1 



1 Proc. Linn. Soc. N.S. Wales, 1916, p. 219. 

 W— October 3, 1917. 



