Aponogeton loriae Martelli

Submerged; rootstock roundish ½-1½ cm. Leaves green or brown, distinctly petiolate (2-15 cm), blade linear-spathulate, 10-35 by 1-4 cm, mostly gradually tapering into the petiole, base narrow-cuneate, apex rather broadly cuneate and ± blunt, primary nerves 2 on both sides and a marginal vein; parenchyma opaque dotted brown-punctate; margin slightly undulate-crisped to ± flat. Scape 5-40 cm. Spathe ½-1½ cm long, ovate-acute, lengthwise nerved, persistent, decaying gradually from the apex towards the base, green, concave, subam-plexicaulous, apex mucronulate. Flowers greenish-yellow, the lower ones over 2-3 cm densely set and with developing fruits, stamens about equalling the tepals on 2 mm long filaments, the upper ones rather abruptly as it seems male with 3 mm long stamens, very small ovaries and flowers set laxly to remote. Spikes 1½-7 elongating in flower up to 18-20 cm. Tepals obovate ca 1½-1¾ by 1-1¼ mm, concave, apex broadly rounded. Stamens 6; anthers roundish oval, no dehisced ones observed by me. Carpels 3, ca 2½ mm long, ovate, ± bluntly trigonous, rather abruptly beaked by a distinct recurved rostrate style about ½ mm long. Seeds (in TEYSMANN 12792) 1-6 with a delicate loose outer coat 6-winged or-ribbed, transparently brown-reticulate-netted-celled, 2 by ⅔ mm. Inner testal coat oblong, opaque, darkbrown, smooth, 1 ¼ by ½ mm, closely enveloping the straight embryo, easily splitting on slight pressure, rounded at both sides.

Common in swiftly flowing, shallow, stony streams, 100-600 m. Fl. June-Jan.