205. potamogeton natans, i.
"Himalayan Journals V2."
J. D. Hooker
211. potamogeton natans, Linn.
"Southern Arabia"
Theodore Bent Mabel Bent
Two of the species confined to the district, Typha angustifolia and potamogeton Friesii, are water-plants which occur only in these reservoirs or in the canals which they supply.
"Hertfordshire"
Herbert W Tompkins