310 A. A. HAMILTON. 



pungens. Neariog the lagoon the latter meets and enters 

 an association of Carex pumila, which extends — accom- 

 panied by the rapidly weakening Zoysia — to the verge of 

 the muddy zone fringing the lagoon, where the further 

 progress of the Zoysia is arrested, the Carex proceeding 

 alone towards the submerged area. The shallow water 

 bordering the mud is occupied by several semi-aquatic 

 species, grouped in accordance with the degree of submerg- 

 ence suited to their requirements. Mimulus repens R.Br., 

 and Selliera radicans Oav., remain in the vicinity of the 

 muddy region, Cotula coronopifolia L., Samolus repens 

 Pers., and Cotula reptans Benth., advancing in this order 

 towards the deeper water. Neither Cotula reptans, nor 

 Mimulus repens, were noted on the rocky headland, but 

 Selliera radicans, and Cotula coronopifolia, were occasion- 

 ally observed associated on the drainage soaked ledges of 

 the escarpment. 



Near the southern (sheltered) end of the beach, Sccevola 

 suaveolens R.Br., spreads a heavy succulent carpet, closely 

 investing and retaining the sand within its boundaries. It 

 is almost entirely restricted to the frontal dune slopes, 

 rarely crossing the embankment plateau. The end of the 

 beacli is flanked by a bank of shale, which curves towards 

 the rocky headland running south to Deewhy head, trailing 

 stems of Kennedya rubicunda and Mesembryanthemum 

 cequilaterale, festooning the weathered verge of the shale- 

 bank. 



On the rocky headland, a rhizomatic colony of Dianella 

 revoluta R.Br., is established in a shallow bed of soil in the 

 rock benches. This species also frequents the dune, but is 

 unable to reach the frontal slopes, and is usually found in 

 the open country at the rear among the hardy undergrowth^ 

 Its fibrous framework does not make a heavy demand upon 

 either food or water supply. A considerable percentage of 



