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Lagenandra
''Lagenandra'' is a genus of flowering plants in the Araceae family. It is endemic to the Indian Subcontinent (Bangladesh, Sri Lanka, and India).〔(Kew World Checklist of Selected Plant Families )〕〔(【引用サイトリンク】 Lagenandra gallery )〕 The genus is similar to ''Cryptocoryne'', but can be distinguished from it by its involute vernation. ''Cryptocoryne'' on the other hand exhibit convolute vernation. == Description == Helophytes, rarely rheophytes, with thick creeping rhizome; leaf blade simple, ovate to almost linear, fine venation transverse-reticulate; spathe tube with connate margins; spadix entirely enclosed in spathe tube; flowers unisexual, perigone absent. Differs from ''Cryptocoryne'' in having female flowers spirally arranged (pseudo-whorl in ''Lagenandra nairii'', whorled in ''Lagenandra gomezii'') and free; spathe tube "kettle" with connate margins (containing spadix) occupying entire spathe tube; spathe blade usually opening only slightly by a straight or twisted slit; berries free, opening from base; leaf ptyxis involute.〔Mayo, S.J., Bogner, J. & Boyce, P.C. 1997. ''The genera of Araceae''. ix+370 pp. Royal Botanic Gardens, Kew〕
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