10. Genus Jamesoniella Spruce

Jamesoniella flexicaulis (Nees) Schiff.

J. Kirkii Steph. Hedwigia 47, 1895; Spec. Hep., ii, 94, 1906; Hodgson, Trans. Roy. Soc. N.Z., 76, 80, 1946.

J. scolopendrina Berggr., N. Z. Hep. i, 16, 1898.

There is now no doubt that Stephani's J. Kirkii is indeed J. flexicaulis, a Javan species, as determined by Hooker in the Handbook. With its flexuous stem, closely imbricate, secund, obliquely ovate leaves, it is distinct and interesting.

Additional localities are—North Island: On bark of silver beech and totara, Raukumara Range, 4,000ft, 5343, A. P. D; Silverstream Bush, track in Pinehaven Bush, near Silverstream Bush, 6784, E. A. H.

South Island: On stump in beech forest. Haast Pass, 1,800ft, H5748, H5962, K. W. A.; head of Hollyford River, 2,000ft, 10374, W. M.

Jamesoniella acinacifolium (Hook. & Tayl.) Steph.

Gymnomitrium acinacifolium (Hook. & Tayl.) G. L. et N. Syn. Hep. 616, 1846, Handb. N.Z. Fl., ii, 501, 1867.

This species discovered by Hooker, creeping among moss and on rocks, Campbell Island, was discovered in Stewart Island, on ground, summit Table Hill, 5/2/47, by W. Martin and first identified by K. W. Allison. The specimen is dark brown to blackish and is well distinguished by its ligulate leaves, somewhat smaller than those of J. flexicaulis.

Jamesoniella occlusa (Tayl.) Steph.

In Species Hepaticarum vol. ii, p. 102, 1906, Stephani places Taylor's Alicularia occlusa (1844) from Campbell Island (Hooker) in Jamesoniella as J. occlusa (Tayl.) St., although Mitten had already referred the specimen to his genus Adelanthus, a form of A. falcatus, as he thought, and the name had been dropped from the Handbook. In Vol. iii, p. 598, 1908, Stephani lists the specimen, together with one from New Zealand (Kirk), under Adelanthus magellanicus (Lindenb.) Spr. This is doubtless correct. Therefore the two plants listed under Jamesoniella occlusa in a footnote to p. 79 of Paper V, together with another from near Taupo (Allison) 6012, must now be considered as Adelanthus magellanicus.

Jamesoniella pseudocclusa Hodgson

A Latin description omitted from the footnote of p. 79 Paper V, is here supplied. Planta magna, sterilis, fusca, erecta. Caulis ad 10 cm, sub-flexuosus, simplex parum ramosus. Folia imbricata, erecta, appressa, sub-reniformia, 1.2 mm × ca 1.9 mm, secunda dorsale, marginibus ventralibus valde et constanter reflexis. Cellulae apicales ca 10μ, mediae ca. 20μ, basales ad ca. 40μ × 15μ, cum trigonis magnis, sub-nodulosis.

The species can be recognized by its tightly reflexed ventral margins. As the leaves are secund and their dorsal surfaces appressed, the reflexed margins of the ventral part are most noticeable. J. Sonderi has a plane ventral margin or maybe slightly incurved.

In addition to Ohakune and Tararuas previously mentioned, the following stations have been recorded:

North Island: Mokai Patea, Ruahines, 5,000ft, 5912, A. P. D.

South Island: Leslie Clearing, Caswell Sound, V. D. Z.; Wilmot Pass to Lake Manapouri, 5634, W. M.; waterfall, Long Island, Dusky Sound, H. H. A.; damp bank at roadside, Haast Pass, ca. 1,800ft, K. W. A. Also five specimens from Stewart Island, W. M.