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(E) Bog
The only extensive areas of bog in the Pegasus area occur on the summit of the Tin Range and in the valley between Crooked Reach and the Frazer Peaks. The former are subalpine, the latter lowland; but there is little difference in either the phanerogamic or cryptogamic floras save that the upland bogs are somewhat richer in species. Species of moss not noted on bogs in the Frazer Peak area include Blindia tenuifolia, Holomitrium perichaetiale, and Breutelia elongata, and hepatics missing from the same area included Jamesoniella pseudoocclusa. Acromastigum colensoanum, A. martinii, and Balantiopsis rosea on the other hand were not observed on the Tin Range bogs, but the search was not extensive or intensive enough to dogmatise on these differences.
The commonest bog mosses are Dicranoloma billardieri in a variety of forms, some quite remarkable, D. integrifolium, D. sp., Campylopus bicolor, C. introflexus, Sphagnum antarcticum, and S. novo-zelandicum. Rather less common were Breutelia elongata, Blindia tenuifolia, Holomitrium perichaetiale, Polytrichum commune, Rhacocarpus australis, and Rhacomitrium lanuginosum var. pruinosum.
The following list comprises some of the commonest hepatics: Acromastigum colensoanum, Balantiopsis rosea, Isotachis montana, Lepidozia sp., L. ulothrix, Lepicolea ochroleuca, Cuspidatula monodon,
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Jamesoniella pseudo-occlusa, J. sonderi, and Radula dentata.
Notes on Individual Species (Contributed by E. Amy Hodgson)
445. Lepidolaena stangeri (G.) Martin and Hodgson. As far as can be ascertained, it is this species that in the Synopsis Hepaticarum is listed as var. stangeri of Polyotus clavigera (Hook.) G., which is a synonym for L. clavigera (Hook.) Dum. It differs from L. clavigera in its smaller size, glaucous colour, dentate-serrate branch leaves, and papillose lobules. If the original var. stangeri ever proves to be something different, then this species must be given a new name.
461. Bazzania quadrata Col. This is one of the many forms of an aggregate species with longish narrowed leaves and long apical teeth sometimes reduced to only 2. The present plant has leaves flatter than in the type, which appears to come very close to the Australian B. accreta, and may be a form of that species.
425. Lepidolaena clavigera (Hook.) Dum., var. taylori (G.) Mitt. In Taylor's herbarium this was labelled merely Jungermannia clavigera Hook. Gottsche made of it a separate species, Polyotus taylori G., which Mitten reduced to a variety of P. clavigera (Hook.) G. I agree with Mitten that it is a variety of L. clavigera (Hook.) Dum., somewhere intermediate between L. clavigera and L. palpebrifolia (Hook.) Dum.
479. Hymenophytum flabellatum (Hook.) St. (approaching). Stephani defines the species as with more than 2 primary divisions to the fan, stalk not at all winged, midrib lost below the apex and the involucre spinous.
420. Plagiochila annotina (Menz.) Ldbg. With sub-entire to entire margins, and strongly pigmented, this form appears to bear relationship to P. circinalis, or perhaps more likely it represents a separate species.
467, etc. Lepidozia pulcherrima St. Previously reported only from Okarito.
536. Lophocolea notophylla (Tayl.) comb. nov., Syn. Lophocolea okaritana St. Correctly identified in Kirk's collection No. 4863 as Jung. notophylla Tayl.
391. Radula unifera (Tayl.) Syn. Hep. Perianths in this specimen, though decurved (in some cases), are not ribbed as is usual in this species.
513. Lepidolaena clavigera (Hook.) Dum. With its purplish-brown colouring, elongate stems, shortly and regularly tri-pinnate, this specimen must come very close to L. brachyclada (L. and L.) St., which is recorded from New Zealand, but in all the descriptions is said to have ciliate stem leaves.
569 and 597. Metzgeria nitida Mitt. Evans (1923) reduced M. nitida Mitt. to M. hamata Lindb., into which it certainly merges, but with its flat margins, few, straight cilia, and sometimes very large cells, it looks very different; so different, in fact, that Stephani considered reducing M. decipiens (Massal.) Schiff. to its synonymy.
495. Metzgeria violacea (Ach.) Dum. In a recent publication,* we
[Footnote] * Svensk Botanisk Tidskrift, Bd. 42, H. 3, 1948.
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reduced this to a variety of M. decipiens, but the name of M. violacca antedates that of M. decipiens by 85 years, and therefore must be retained.
623. Bazzania monilinerve (L. and L.) Syn. Hep. This specimen is very distinct in its well-defined vitta of large cells, as in Gottsche and Lindenberg's plate, also in the narrowed, 3-spinous (spines diverging) apex, which is characteristic of B. accreta, as also figured in the author's plate. A note by the authors which may be significant is that both B. accreta and B. monilinerve were in the same clump. They are Australian species. The Handbook accredits B. monilinerve to New Zealand, but Stephani does not.
718. Radula sp. cum fr. This fruiting specimen which seems to be a bigger form of the one thought to be R. sainsburiana (Martin in Trans. Roy. Soc., 1949, 273) is not paroicous, and must be considered an undescribed species.
720. Adelanthus falcatus (Hook.) Mitt. forma non-falcata. A. magellanicus (Lindenb.) Spr. given as from Campbell Is. and New Zealand by Stephani, has entire leaves according to the Synopsis description, though Stephani does not mention this. A. falcata has toothed leaves as in this specimen.
721. Porella stangeri (Syn. Hep.) Hodgson. If Mitten and Stephani are correct in considering Madotheca partita (Tayl.) Syn. Hep. as conspecific with M. stangeri Syn. Hep., then the latter name must give way, as Taylor's name was published first.
663, etc. Frullania setchellii Pearson = F. falciloba var. setchellii (Pears.) Hodgson. On further consideration, I would like to take this opportunity of restoring F. setchelli Pears. to specific rank.
457. Frullania scandens Mont. (Syn. F. subdeplanata St.). Stephani's description of F. scandens is at variance with Montagne's.
546. Probably the most interesting association in this remarkable collection is this combination, with others, of the North Auckland Radula dentata, a 3-fid-leaved specimen of Lepidozia gottscheana, Telaranea biselula, and a new species of Acromastigum, to which I have given the MS, name of Acromastigum martinii sp. nov.