258 CXVIII. HYDROCHARIDEJX. | [Blyza. 
S BEVA Dg... ' 
Besides the Australian species, which is spread over tropical Asia, there is another | 
m the Mascarene islands. 
. B. Roxburghii, Rich. in Mem. Inst. Fr. 1811, 77, t. 5. Leaves - 
entirely submerged, long and narrow like those of Vallisneria spiralis, 
about 23 lines long, the inner twice as long. Stamens about 8, the - 
filaments short, the linear anthers not exceeding the outer perianth- - 
a 
‘seeds not very numerous.— Vallisneria octandra, Roxb. Pl. Corom. ii. 34, - 
` t. 165; Blywa octandra, Planch. Mss.; Thw. Enum. Pl. Ceyl. 332. - 
N. Australia. Robinson river, Gulf of Carpentaria, F. Mueller; Port Darwin, 
Schultz, n. 423. 
eensland. Water-holes, Bockingbem bay, and Burdekin river, Dallachy. 
S. Australia. Waters near Lake Torrens, F. Mueller. — 
Our specimens are not sufficiently perfect to show the form of the female perianth, nor — 
whether it bas the three stamens mentioned: by Decaisne and by Thwaites, but which — 
do not appear to be always present in the Indian plant. 
4, VALLISNERIA, Linn. 
or bifid. ary narrow | 
cylindrical, enclosed in the spathe. Seeds numerous, cylindrical— — 
Submerged herbs, the leaves and peduncles tufted at the bottom o [ 
water, the leaves very long, without any lamina. i; 
