526 
V. HEPATIC.®. 
\Microjitery(jiurn . 
keeled in the American but not in the only N. Z. species. Stipules entire 
or 2-4-fid. Fruits terminal on short lateral branches. Involucral leaves 
elongate, ciliate. Perianth long, membranous, triquetrous ; mouth laciniate. 
Calyptra slender, membranous, included. Capsule on a slender fruitstalk ; 
elaters with 2 spiral fibres. Antheridia as in Mastigobryum ? 
A small genus of temperate and tropical American species. 
1. M. nutans, Mitten in FI. N. Z. ii. 148. Stem 1 in. high, stout, 
tufted, erect from a creeping rhizome, thickened upwards, succulent, nearly 
simple ; tips incurved or nodding. Leaves pale green or whitish, cellular, 
spreading, densely imbricate, concave, broadly ovate, unequally 2-fid, sub- 
entire ; segments incurved, lower smaller. Stipules erect, broadly ovate, 2-fid 
or -toothed. Perianth lateral, large, lanceolate, trigonous above. — Mastigo- 
bryum, FI. Antarct. 160. t. 65. f. 8; Syn. Hep. 219 and 717. 
Northern Island : forests of Titiokura, Colenso. Lord Auckland’s group: wet 
places, at the roots of trees, etc., J. D. H. — Mitten observes that the 2-fid leaves and 
absence of a keel are against its association with the American species, but its habit, etc., 
is similar, and widely different from that of Mastigobryum. 
16. ISOTACHIS, Mitten. 
Stem erect, branching with innovations, almost trifarious. Leaves in- 
cubous, imbricating, conduplicate, serrulate. Stipules nearly as large. Fruit 
terminal. Involucral leaves, inner minute, outer like the cauline. Perianth 
erect, tubular, fleshy, rigid ; mouth contracted, toothed. 
A southern genus, of which its author says it may be recognized by its evenly arranged 
leaves and stipules, the latter so closely resembling leaves that the leaves may almost be 
called trifarious. It resembles Sendtnera in habit, but differs in the form of the perianth 
and free calyptra. 
1. I. Lyallii, Mitten in FI. N. Z. ii. 149. t. 100./. 7. Stem 2-4 in. 
high, erect ; branches decurved at the tips. Leaves pale brown and purple, 
imbricate, subquadrate or ^-cordate, truncate ; dorsal margin arched, toothed 
at the apex ; ventral spinulose ; segments toothed, recurved. Stipules obovate, 
3-4-fid. Perianth subcylindric, obtuse, papillose. 
Northern and Middle Islands: top of the Ruahine range, Colenso; Port Preserva- 
tion, Lyall. — A tall and handsome plant. 
2. I. subtrifida, Hook.f. and Tayl. in Fond. Journ. Bot. 1844, 579 ; — ■ 
FI. N. Z. ii. 149. Stem 1 in. high, slender, simple; tips decurved. Leaves 
pale brown, upper rosy, loosely imbricate, secund, erecto-patent, ovate, con- 
duplicate, 2-3-fid ; teeth and dorsal margin entire ; ventral entire or toothed. 
Stipules similar, smaller. — Syn. Hep. 681 ; FI. Tasman, t. 179. f. 7. 
Northern Island : Bay of Islands, J. _D. H. (Tasmania.) 
3. I. intortifolia. Hook. f. and Tayl. FI. Antarct. 150. t. 64. /. 1. 
Stems 1^-2 in. high, erect, flaccid, sparingly branched. Leaves purplish, 
spreading, imbricate, flaccid, cellular, very concave, ventricose, amplexicaul, 
orbicular oblong, unequally 2-4-fid, rarely entire ; segments acuminate, in- 
curved, toothed. Stipules imbricate, large, orbicular, very concave, emargi- 
nate 2-fid or toothed, membranous. — FI. Tasman, ii. 233. 
Campbell’s Island : bogs on the hills, J. A. II. (Tasmania.) 
