Hygrobiella laxiflora

Leaf margin entire No microphyllous branches
Cuticle smooth
Dioicous
Underleaves present
Capsule valves vertical
Gemmae absent
Perianth present
Green to reddish brown
Perianth long emergent
Lobes symmetrical
Perianth terete
Leaf bases not decurrent
Shoots mainly ascending
Rhizoids not prominent
Leaves transverse
Shoot isophyllous
Underleaves >.5 X leaves
Underleaves bilobed
Sinus acute
Perigynium absent
Perianth mouth narrow
Shoots mainly prostrate
Leaves spreading
Trigones not thickened
Leaves overlap slightly
Divided < 0.5 leaf length
Leaves bilobed
Lobe tips obtuse
Perianth trigonous
Corners not winged
Vitta absent
Irregular branching
Leaves remote
Perianth mouth dentate
Small: 0.5 - 1.5 mm wide
Cell walls evenly thick
Lobes asymmetrical
Microphyllous branches
Perianth mouth ciliate
Oil-bodies absent