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Volume 77, 1948-49
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(F) Bog.

The areas examined comprised the summit bogs of Mt. Anglem, Table Hill, and Mt. Rakiahua (visited in 1928 when interest was centred more in the phanerogamic flora). All three have a similar florula, both phanerogamic and cryptogamic. The mosses listed by me on the summit moorland of Mt. Anglem, comprised the following:— Sphagnum cuspidatum (in a wide sense), S. novo-zelandicum, Breutelia elongata, B. pendula, Blindia tenuifolia, Dicranoloma robustum

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var. pungens, D. robustum var. setosum, D. integrifolium, Rhacocarpus australis, Rhacomitrium lanuginosum var. pruinosum, Polytrichum alpinum, Campylopus clavatus, C. introflexus, and Acrocldium auriculatum.

Associated hepatics were—Jamesoniella colorata, J. sonderi, Gymnomitrium stygium, Lepidolaena clavigera, Chiloscyphus menziesii, and Cuspidatula monodon, all of which grow also on sub-alpine rocks. Lichens were not uncommon and included Cladonia aggregata, C. fimbriaria, and C. retipora, the last in small amount. Sphaerophora tener was abundant, but other lichens have not yet been determined.

Table Hill bogs have much Sphagnum, in small patches only as a rule, and including S. antarcticum, S. novo-zelandicum, S. magellanicum, and a variety of forms grouped by Mr. Sainsbury under S. cuspidatum pending a much-needed revision of this genus. One patch of Sphagnum has built up what appears to be a very local and restricted area of “high moor,” which locally is known as the Swan's Nest. In the centre of this mound Blindia tenuifolia was remarkably luxuriant, with stems close on 1 ft. long. Dicranoloma integrifolium and Holomitrium perichaetiale, here associated with it, were equally luxuriant, as was the hepatic well-named Isotachis gigantea. Dicranoloma pungentella and D. billardieri are locally plentiful, Bryum laevigatum occurs, Campylopus clavatus is abundant, and C. introflexus, also common, has the terminal arista scarcely bent. C. bicolor, usually very dark in colour, is not very common, and C. kirkii was not observed, but the relations of these two mosses require critical study.

Rhacocarpus australis and Rhacomitrium lanuginosum var. pruinosum are everywhere common at the higher levels. Breutelia elongata was less common than on Mt. Anglem. The presence of Holomitrium perichaetiale in Sphagnum bog both on Mt. Anglem and on Table Hill and its remarkable luxuriance were notable in a moss more usually epiphytic. A beautiful plush-green Campylopus was abundant on Table Hill from 1,500 to 1,600 feet altitude, which may be a form of C. clavatus.