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1. Marsilea Linnaeus, Sp. Pl. 2: 1099. 1753.
蘋属 ping shu
Lemma Adanson; Spheroidia Dulac; Zaluzianskia Necker.
Fronds in deeper water with stipes lax and slender and pinnae floating upon water surface; fronds in shallow water or on land with erect stipes and pinnae oriented in various positions by action of basal pulvini; pinnae 4, obtriangular to fan-shaped, clustered at tip of stipe. Veins of pinnae forking dichotomously, anastomosing to form elongate areoles. Sporocarps 1 to many per frond, quadrate to elliptic in lateral view, leathery to woody when mature. Sori oblong, with few megasporangia and numerous microsporangia in each sorus. Megaspore ovoid-globose with a terminal papilla; spore wall thin, indistinctly reticulate. Microspores globose; spore wall thin, indistinctly sculptured. x = 20.
About 52 species: worldwide, with centers of diversity in tropical Africa and Australia; three species in China.
Dimensions of vegetative parts of all species can vary greatly in size depending upon water levels and season of the year; frond dimensions in the descriptions are from emergent or land fronds, not floating ones.
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| 1 |
Sporocarp quadrate in lateral view, concave on lateral sides. |
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3 M. aegyptiaca |
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Sporocarp elliptic in lateral view, convex on lateral sides |
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(2) |
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| 2 (1) |
Sporocarps (1 or)2-5(-7) per fertile frond, attached to stipe up to 25 mm above stipe base; common peduncle joining 2 or more peduncles to stipe 2-8 mm. |
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1 M. quadrifolia |
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Sporocarps 1 or 2(-4) per fertile frond, attached to stipe up to 5 mm above stipe base; common peduncle joining 2 peduncles to stipe, if present then only 1 mm. |
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2 M. minuta |
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Lower Taxa
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