Chracter Psammogeton hirsuta P. Canescens P. Shivalikense
Plant (cm tall) 3–6, hirsute (5-) 8–30, pubescent 1–3, pubescent
stem distinctly Zig-zag Straightened Straightened
Leaves densely hirsute softly pubescent softly pubescent
Flowers upto 6 per umbellet upto 12 per umbellet upto 5 umbellet
Peduncle (cm) upto 1.2 upto 9 upto 1
Rays ±5 ±12 ±4
Bracts ±3, densely hairy on ±4, hairy on midribs ±2, hairy on midribs
both surfaces & margins and margins and margins
Bracteoles Obovate oblong Oblong Obovate or oblong
Stylopodium conical narrowly conical conical
Style 0.8 – 1.0 1–1.5 mm long 1–1.2 mm
Fruit hair ± 1.7 mm ±1.5 mm ±1.4 mm
Fruit Oblong Ellipsoid oblong Ovoid oblong