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FOC | Family List | FOC Vol. 24 | Pontederiaceae

1. Monochoria C. Presl, Reliq. Haenk. 1: 127. 1827.

雨久花属 yu jiu hua shu

Gomphima Rafinesque.

Herbs paludose or aquatic, perennial or under unfavorable conditions annual. Stems erect or creeping. Leaves radical from vegetative stem, solitary from flowering stems, curvinerved. Inflorescences racemose or subumbelliform, enveloped in broad leaf sheaths when young; peduncle bracteate at base; bract large. Flowers subsessile or shortly pedicellate; perianth segments free nearly to base, spreading during anthesis and afterward spirally contorted, inner segments wider than outer. Stamens 6, inserted at base of perianth, dimorphic: 1 with filament long, laterally with an erect, oblique tooth, anther basifixed, blue, large; other 5 subequal, anthers basifixed, yellow, small. Ovary 3-loculed; ovules numerous per locule. Style filiform; stigma subentire or minutely 3-lobed. Capsule loculicidal, 3-valved. Seeds small, longitudinally winged, transversely striate.

Eight species: tropical and subtropical Africa, Asia, and Australia; four species in China.

1 Flowering stems usually 12--35 cm; inflorescences reflexed after anthesis   4 Monochoria vaginalis
+ Flowering stems usually 30--200 cm; inflorescences remaining erect after anthesis.   (2)
2 (1) Leaf blade broadly cordate to ovate-cordate, 4--10 cm, basal lobes rounded   1 Monochoria korsakowii
+ Leaf blade sagittate or hastate to triangular-ovate, 5--35 cm.   (3)
3 (2) Peduncle distinctly shorter than associated leaf petiole   2 Monochoria hastata
+ Peduncle longer than associated leaf petiole   3 Monochoria elata

Lower Taxa


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