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FOC | Family List | FOC Vol. 16 | Menyanthaceae

2. Nymphoides Seguier, Pl. Veron. 3: 121. 1754.

荇菜属 xing cai shu

Limnanthemum S. G. Gmelin.

Perennials [or annuals], aquatic, usually carpeting surface of lakes and ponds, with short basal rhizomes producing many, slender, and petiolelike stolons [or lacking rhizomes]. Stems usually long, floating, sometimes producing rootlets from nodes. Leaves alternate, rarely apparently opposite; leaf blade floating, veins palmate. Flowers clustered at nodes, (4 or) 5merous, distylous or occasionally homostylous. Calyx lobed to near base. Corolla rotate, lobed to near base, rarely less deeply lobed and campanulate, throat with 5 bundles of long fimbriae. Stamens inserted on corolla tube. Style linear. Nectaries 5, attached at ovary base. Capsules indehiscent, few seeded. Seeds compressed or globose, smooth or ornamented.

About 40 species: temperate and tropics; six species in China.

1 Stem unbranched; leaves apparently opposite at stem apex, alternate at stem node; corolla, 2.5-3 cm in diam., lobe margins broadly membranous; capsules 1.7-2.5 cm; seeds compressed, 4-5 mm, densely ciliate .   1 Nymphoides peltata
+ Stem branched; leaves solitary at stem apex, sometimes also 1-3 leaves at stem nodes; corolla 0.5-1.5 cm in diam., lobe margins not membranous; capsules 0.2-0.6 cm; seeds not compressed, 1-1.5 mm, not ciliate.   (2)
2 (1) Flowers 2 per node; corolla yellow; seed coat reticulate .   2 Nymphoides aurantiaca
+ Flowers many per node; corolla white or white with a yellow center; seed coat smooth, scabrous, or spinescent.   (3)
3 (2) Leaves densely glandular and abaxially scabrous; corolla white with a yellow center.   (4)
+ Leaves glabrous on both surfaces; corolla pure white.   (5)
4 (3) Corolla lobes densely long pilose inside, without a longitudinal fold .   3 Nymphoides indica
+ Corolla lobes glabrous inside, with a longitudinal fold   4 Nymphoides cristata
5 (3) Corolla campanulate, lobes shorter than tube; seed coat irregularly short spinescent .   5 Nymphoides hydrophyllum
+ Corolla rotate, lobes longer than tube; seed coat smooth or with a denticulate margin .   6 Nymphoides coreana

Lower Taxa


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