454 Mk. H. N. DIXON ON SOME 
ORTHORRHYNCHIUM ELEGANS (Hook. f. & Wils.), Broth. Kaipara, near 
Auckland (Blackwell, No. 31). 
HoMALIA AURICULATA, Hook. Г. & Wils. Waitakarei Hills (Murray, 
No. 31); Kaipara, near Auckland, North Т. (Blackwell, No. 36). There 
appears frequently to be some confusion in collections between this and 
H. pulchella, Hook. Ё. & Wils. In Hampe's Herbarium the specimens labelled 
И. pulehella clearly belong to И. auriculata. — Wilson's own. specimens show 
11. pulchela to be the smaller plant, with leaves distinctly denticulate, while 
H. auriculata is quite distinct, larger, glossy, with broader fronds and the 
leaves subentire. 
Н. rancrroLrA, Hook. f. & Wils. Kaipara, near Auckland, North I. 
( Blackwell, No. 35). 
THAMNIUM PANDUM (Hook. f. & Wils.), Jaeg. Mt. Cook district (Murray, 
Nos. 94, 111). 
THAMNIUM LATIFOLIUM (Dozy & Molkenb.), IKindb. (Th. australe, Lindb. 
МБ.). Waitakarei Hills (Murray, No. 85). А rigid, dendroid plant, with 
short, broad, very complanate frond, and close, regular, tripinnate branching, 
the branches scarcely at all Васе огт, In habit it has nothing in common 
with the Porotrichium latifolium of the * Bryologia Javanica,’ as indicated 
by the figure, or as represented by the Sumatran plant (e.g. Sumatra, 
leg. Beccari, in Herb. Kew.). But the specimen in Knights Herbarium, on 
which Lindberg’s MS. name was founded, and on which Kindberg established 
the identity with the East Indian species, is just intermediate between the 
two, though much more nearly according with the original species ; while, on 
the other hand, Murray's plant, so different in habit, agrees exactly with 
Knights in the form and structure of the leaves. Гат therefore induced, 
though with some hesitation, to refer Murray's No. 88 to Th. latifolium. 
There has been some confusion, perhaps partly caused by this plant, as to 
what is Thamnium pumilum (Hook. f. & Wils.). An Australian species, now 
determined as Th. effagellare, Anpstr., has been distributed as Th. pumilum, 
Hook. f. & Wils., but is a different plant, with the leaves much less markedly 
complanate and generally much more robust. Th. pumilum т Wilson's 
Herbarium is а very delicate small plant with complanate leaves and frond. 
The chief difference, however, from a structural point of view, lies in the 
nerve, which in Th. pumilum is comparatively slender, tapering off and 
disappearing а long way below the apex; while in Th. eflagellare and 
Th. latifolium it is very stout, and scarcely tapers at all, ending abruptly 
close under the leaf apex. In this character TA. latifolium agrees with 
Th. efagellare, while in habit and texture it is more like Th. pumilum, but 
of far larger size. Th. eflagellare really belongs to a different group, and is 
not very distantly connected with T'À. pandum. I have received he true 
