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FOC | Family List | FOC Vol. 23 | Hydrocharitaceae | Ottelia

5. Ottelia acuminata (Gagnepain) Dandy, J. Bot. 72: 137. 1934.

海菜花 hai cai hua

Leaves wholly submerged; petioles varying greatly in length according to depth of water; leaf blades varying greatly in shape and size, linear to broadly cordate, base cordate to attenuate, margin entire, undulate, or serrulate, apex obtuse. Flowers unisexual. Spathe with 2-6 longitudinal ribs. Male spathe with 40-190 male flowers; sepals green; petals white with yellow base, obcordate or obovate, 1-3.5 cm; stamens 9-12; filaments hairy; anthers ovoid-elliptic; staminodes 3. Female spathe with 2-9 female flowers; perianth similar to male ones; ovary triangular-cylindric with 3 carpels; styles 3, deeply bifid; staminodes 3. Fruit triangular-cylindric to fusiform, ca. 8 cm. Seeds narrowly elliptic, with or without hairs. Fl. May-Oct. 2n = 22*.

● Lakes, ponds, channels, paddy fields, rivers, streams. Guangdong, Guangxi, Guizhou, Hainan, Sichuan, Yunnan.

1 Male spathe with 60-190 flowers; female spathe with 8 or 9 flowers.   5d var. jingxiensis
+ Male spathe with 40-50 flowers; female spathe with 2 or 3 flowers   (2)
2 (1) Male spathe without veins, with bulbs within.   5c var. lunanensis
+ Male spathe with several veins, without bulbs within   (3)
3 (2) Fruit triangular-conic; leaves not ligulate.   5a var. acuminata
+ Fruit slightly curved, fusiform; leaves ligulate.   5b var. crispa

Lower Taxa


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