resemble in a measure the primary successions on such slopes, with the modifications due to the presence of relies of the original grassland cover, the presence of exotic plants in the neighbourhood, and the presence of stock.

Concave slopes revert to an open débris community in which Pteriduim esculentum is dominant. Rubus australis, R. subpauperatus, R. cissoides occur, usually in quantity, and Epilobium cinereum, E. hirtigerum, *Verbascum Thapsus, *Rumex Acetosella, Coriaria sarmentosa and *Hypochaeris radicata may be abundant. Where consolidated tracks cross these débris slopes Pteridium esculentum disappears and Poa caespitosa or Festuca novae-zealandiae may be plentiful.

In the rabbit-infested area of the Orari side certain burnt-over slopes covered in fine débris are still further depleted of their grassland species, and *Verbascum Thapsus is now present in great quantities, with little else but *Rumex Acetosella and Epilobiun nerterioides. In a few cases spp. of Epilobia are almost the sole plants present.

On other slopes a succession somewhat resembling that occurring on the river-beds is set up. Here on the very open ground Raoulia subsericea, R. Monroi and Celmisia spectabilis are early comers, the mats of the scabweeds forming a seed-bed for grasses and herbs from the adjacent areas. Leucopogon Fraseri and Helichrysun filicaule are also common. Acaena Sanguisorbae var. pusilla, a quite minor feature of the grassland, here becomes aggressive forming mats of fair size. *Rumex Acetosella and *Hypochaeris radicata also spread rapidly and occupy, much ground, as does Blechnum penna marina. Festuca novae-zealandiae gradually regains possession; the seabweeds having played their parts, succumb, and low tussock-grassland is restored.

On the richly manured ground where sheep camp the following form a distinct, if small, community: *Rumex Acetosella, *Stellaria media, *Geranium molle, *Myosotis caespitosa, *Poa pratensis, with which may be *Sisymbrium officinale, *Senecio sylvaticus, *Marrubium vulgare (this last not here forming the large colonies often so characteristic of sheep camps). In some camps there are patches of Cotula squalida forming a dense turf.