Hydrilla verticillata (L.f.) Royle Water Thyme
Ill.Bot.Himal.Mts. 376 (1839)

Conservation Code: Not threatened
Naturalised Status: Mixed (Native in Part of Range, Naturalised Elsewhere)
Name Status: Current

Brief Description
Grazyna Paczkowska, Wednesday 13 July 1994

Submerged, attached, much branched, aquatic perennial, herb, leaves in whorls, flowers emergent, male flower is a detached, air filled bud; air pollination. Fl. green & other, Apr to Jul. Sand. In stagnant or slow-flowing freshwater.


Beard’s Provinces: Northern Province, South-West Province.

IBRA Regions: Central Kimberley, Dampierland, Ord Victoria Plain, Swan Coastal Plain, Victoria Bonaparte.

IBRA Subregions: Hart, Ord, Ord-Victoria Plains P1, Perth, Pindanland, Victoria Bonaparte P1.

IMCRA Regions: Leeuwin-Naturaliste.

Local Government Areas (LGAs): Broome, Canning, Cockburn, Halls Creek, Swan, Vincent, Wyndham-East Kimberley.