Isoetes alpina Kirk
I. multiangularis Col. in T.N.Z.I. 22, 1890, 449.
Type locality: Lake Guyon, Nelson, alt. 1,000 m.
Submerged, axis short, deeply 3-lobed; lvs up to 75, 15 cm. to 5 dm. long, slender, dark green. Sporangia about oblong, up to 5 mm. long, megaspores greyish, smooth or obscurely tubercled; microspores ∞, minute.
DIST.: N., Lake Taupo; S., frequent in montane and lower subalpine waters.