356 Transactions.— Botany. 
Obs.—A species pretty closely allied to S. rhizobola, Nees, but differing 
considerably. 
10. S. undulata, sp. nov. 
Plant dicecious, of densely compact growth, procumbent, creeping, 
rooting from midrib below its whole length, apices free, branches frondose, 
1-1} inches long, 2-84 lines wide, forked, linear, crisp, translucent, brittle, 
much undulated and sub-sinuate, margins entire, sub-involute, apices 
orbicular and emarginate ; eolour light green, midrib broad, dark, nerve 
indistinet with long brown hairy rootlets blog fructification from the 
midrib on the upper surface, 2-3 on a branchlet at a short distance from 
each other; involucre large, sub-flabellate, trifid and laciniate, sometimes 
surrounding calyptra, front and sides ; calyptra cylindric, 14-2 lines long, 
whitish, largely tuberculate and fimbriate, particularly at apex ; tubercles at 
first white, succulent, soon becoming reddish-brown ; mouth laciniate ; 
peduncle 1-14 inches long, rather stout ; capsule yoth of an inch long, 
cylindric, linear-oblong, obtuse, sub-apiculate, shining, dark purple-brown ; 
valves cohering at apex ; spores minute, orbicular, black and tuberculated ; 
elaters geminal ; antheridia in dense brownish linear masses, with minute 
fimbriated perigonial leaves on the midrib upper surface, running nearly 
the whole length of their branchlets. 
Hab, On shady sides and hollows of decomposing and damp limestone 
rocks and cliffs, hills, at Petane, near Napier, September, 1888: Mr. A. 
Hamilton ; most profusely bearing fruit. 
Obs. This plant differs much in appearance from all other known in- 
digenous species of this genus; it often presents a very peculiar appear- 
ance from its densely-clustered and regular manner of puckered contracted 
growth, a patch of it extending a few inches each way without break ; at 
such times its regular form reminds one of the thickly-compacted small in- 
volute petals of a double Dahlia—and of the leaves of a small variety of 
our Dichondra repens closely compacted in growth, sometimes met with in 
patches on our dry upland heaths. It also grows over and on other fron- 
dose and larger Hepatice (as Marchantia), while minute Hepatice (Junger- 
mannia, sps.) often grow over it. It bears fruit plentifully—some plants, 
or patches, bristling with capsules, while others alongside are wholly 
barren. Some of the larger specimens resemble in habit Steetzia lyellii. 
A smaller and still more densely-compacted variety has also been noticed, 
which is similar though reduced in all its parts. 
11. S. marchantioides, sp. nov. 
Plant procumbent, ereeping, of irregular shape and growth, but some- 
what spreading out into a circular form from a centre, adhering strongly to 
the soil ; fronds pale green with a very broad and dark midrib, 1-14 inches 
