Hepatice, by W. Mitten.] FLORA OF TASMANIA. 233 
marginatis marginibus uno binisve dentibus armatis, amphigastriis paulo majoribus conformibus, foliis invo- 
lucralibus exterioribus latioribus interioribus minutis, perianthio cylindrico rugoso apice contracto dia- 
phano. (Tas. CLXXIX. Fig. 8.) 
Has. Arthur's Lakes, Gunn, Archer. 
Fusca. Caulis cespitosus, uncialis biuncialisve, erectus. Folia divaricata, subverticalia, involucralia caulinis 
similia, interiora minuta et perianthio adpressa. Perianthium cylindricum, crassum, rugosum, apice albidum, dia- 
phanum, minute plicatum. 
Very nearly allied to 7. madida in size, colour, and habit, but with wider and less deeply notched leaves, which 
are also more distant and divaricate. The perianth, like that of 7. Lyellii and I. madida, is remarkably thick and 
fleshy ; in the last-named species it is composed of five strata of cells, the roughness on its exterior surface appears 
to be caused by the partial breaking up of the external wall of cells, and resembles that of the calyptre of the Sar- 
eomitria —PLATE CLXXIX. Fig. 8; 1, a portion of the stem, with leaves and stipule; 2, a leaf, and 3, a stipule, 
removed from the stem; 4, the perianth, removed from the involucral leaves; 5, the involucral leaves and stipule, 
showing the smaller internal leaves :—all magnified. 
9. Isotachis intortifolia (Mitten).—Jungermannia intortifolia, Hook. fil. et Tayl. Crypt. Antarct. 
p. 38. pl. 64. f. 1. 
Has. On rocks: Rivulet near Cumming's Head, Western Mountains, Archer. 
Gen. XI. SCAPANIA, Ldbg. 
l. Scapania obtusifolia (Mitten).—Jungermannia obtusifolia, Hook. Brit. Jung. t. 26; G. L. et 
N. Syn. Hep. p. 16. J. domestica, Gottsche, Plante Muelleriana. 
Has. Rivulet near Cumming's Head, Western Mountains, Archer. Grass-tree Hill, Oldfield. 
These specimens appear to agree in every respect with British examples; and although Dr. Gottsche has re- 
cently, from the Australian specimens gathered by Dr. F. Mueller, described it as a distinct species, yet the sum of 
the characters he has given amount only to this,—that the stems are a little longer, and the perianth a little shorter, 
than in European specimens of Jungermannia obtusifolia, with which he admits that it otherwise agrees : the Tas- 
manian specimens, evidently the same species as those from Australia, have not that appearance presented by Dr. 
Mueller's, from his having grown in a compact tuft. A careful examination of the insertion of the leaves of this 
species, as well as of those of Jungermannia albicans, has confirmed the fact, already suspected from the substance of 
the leaves themselves, that they belong to that section of the leafy Hepatice whose leaves are inserted with the dor- 
sal angle nearest towards the apex of the stems,—incubous,—in this particular they are at once removed from Jun- 
germannia, and agree with Scapania, excepting that the perianth is not appressed, but contracted at the mouth, con- 
trary to the characters ascribed to Seapania ; nevertheless precisely the same kind of perianth is sometimes produced 
by S. undulata, but whatever variations may take place in the form of the perianth, Scapania, with the additions here 
proposed, forms a most natural genus, whose place must be near to Gottschea. 
2. Scapania densifolia (Nees ab E.; G. L. et N. Syn. Hep. p. 72).—8. vertebralis, Tayl. ; G. L. 
et N. l.c. pp. 72 et 663. Jungermannia densifolia, Hook. Musc. Exot. t. 36. 
Has. Tasmania, Gunn. 
There appears to be no difference, excepting the paler colour, to distinguish S. rertebralis from the present, and 
the perianth is, as in other species of the genus, flattened, and at the apex truncate. : 
Gen. XII. GOTTSCHEA, Nees ab E. 
1. Gottschea pinnatifolia [ Hook.] (Nees; Syn. Hep. pp. 22 et 625). 
Haz. In a rivulet near the Acheron River, with Chiloscyphus conjugatus, Gunn. 
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