Halophila.] CXXXYIII. NAIADEX. 188 
Victoria. Port Phillip and Queenscliffe, F. Mueller. 
Tasmania. Bass’s. Straits, G Gunn, 
S. Australia. M‘Donnell’s Bay, Mrs, Wehl; St. Vincent's Gulf, F, Mueller, 
The species is common on the shores of the Indian and Pacific pere often above 
low-water mark at the mouths of large rivers, or brought m depths of 
seven nume or more. AD the Australian specimens I reg cs ore without 
fructifica 
2. H. spi nulosa, S yon .—Stems slender, submerged, with simple 
branches of 3 to 6 in. in the specimens seen. Leaves opposite, dis- 
tichous sessile, bos linear or almost spathulate, rounded at the end 
and bordered by small aeute teeth or cilia, 3 to $ in. long and about 
2 to 25 lines broad, 3-nerved, without any scales or sheathing stipules 
at the base, but the margin on Lu lower side dilated into a semi-oval 
appendage folded over the lam Male flowers unknown. Females 
Within a pair of small lvii brote sessile in the axils, in fruit i in 
the only specimen seen, the capsules solitary, ovate, about 2 or 21 lines 
long, appare tly bursting irregularly. Seeds several, rather more than 
1 lin ‘eee closely resembling those figured by Gaudichaud of H. 
ovalis. Embryo almost globular, the plumula and the narrow cotyle- 
ula 
donous end curved over it, both enclosed in a aay at the top of the 
embryo,—Ca spinulosa, R. Br. Prod. 339. 
Queensland rt Denison, Kilner ; coral rem Albany Island, F. Mueller ; 
tropical Nott, y: Brown ; Cape York, Moseley 
The specimens in Brown' s herbarium have no label indicating asra baee D Eo, 
have no fructification, but, Kilner's specimen in F. Mueller's herbari 
Other respects precisely similar e species is certai very diff hon = “from Hf 
"AD to which Ascherson (Linnea, xxxv. i thought i a pi belong from 
Town's short diagnosis. F, Mueller r, Fragm. vi > fen it gen 
under the name of ao ari but that name is A Bu, uo o fruit 
and seeds of our plant agree so well with those of oni that s "pA Sk seem 
Worth while to separate it generically on account of the foliage w. s far from 
uniform in what are admit ted as true species of Halophila. 
Order CXXXIX. ALISMACEH. 
à Flowers hermaphrodite or unisexual, saps Perianth when per- 
ect of 6 Segments, imbricate in 2 series, the 3 outer ones membranous 
x berbaceous, the Sinner lar 
n 
y 
short style or with a sessile terminal stigma; ovules 1, 2 or few, erect 
the base use the cavity, or the funicle of the inner one shortly 
ate to the inn r angle, or numerous and pari In fruit the carpels 
ripen into ri Pan nutlets, or when several-seeded are variously 
