72 
Descriptive Notes on Papuan Plants^ 
This sppcies ajrrees in its teethless petioles with C. inemis (Lour. 
Flor. Cocliinchin. ii. 770); in tlje witlth and the beneath not shining 
lejitiets with C. media and C. angulata, (R. Br. Prodr. 348) and with 
the hitter also in the form of the lamina of the female raehis. It differs 
from the two last-mentioned species in the absence of teeth on the 
petioles, in shorter perfectly Hat and less rigid segments of the leaves ; 
from C. circinalis (L. Sp. PI. 1188) in paler, shorter and narrower leaf- 
segments, which are not very conspicuously narrowed at the base, also 
in a less elongated and less incised plate of the female raehis. The male 
inflorescence, as yet unknown, may offer other distinctive notes. C. 
pectinata of Griffith seems only known by name. Ach. Richard (Voyage 
de TAstrolabe, Botanique, xxiii) mentions C. circinalis from Port Doreh. 
HYDROCHARIDE^. 
HYDUOCHAniS MoRsrs ranje. 
Linne, Spec. Plant. 1036. 
Fly-River ; D’ Albertis. 
The specimens, secured in New Guinea, are devoid of flowers and 
fruit, but the anatomic structure of the leaves leads readily to the 
recognition of the species, which otherwise from foliage alone might he 
confounded with some Limnanthemnms. 
Like Australian specimens, which were obtained at Moreton’s Bay 
by Mr. Walt, Hill and at Rockhampton by Mons. A. Thozet, so the 
Papuan plant also shows only a shallow sinus of the base of the leaves ; 
but this characteristic proves not absolute. The plant at the Fly-River 
is accompanied by Ceratophyllum demersum. Griffith found H. Morsus 
ranse in India according to his posthumous papers, t. 57. H. Asiatica 
(Miq. FL Ind. Batav. iii. 239j, if really referable to this genus, is at 
once distinguished by its oval leaves. Bentham (FL Austr. vi. 256) 
expresses some doubts, whether the Australian plant is really indigenous ; 
hut as it is associated with Drosera Aldrovandi and Cahomba peltata, 
neither of which was here ever cultivated, we have no reason to assume 
any of these plants to he introduced. 
ORCHIDE^. 
Dendrobium undulatum. 
R. Brown, Frodr, 332. 
On the Fly-River ; D’ Albertis. 
