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Hymenachne Beauv.

膜稃草属

Description from Flora of China

Aquatic perennials. Culms long, decumbent, spongy, rooting at lower nodes, internodes solid, filled with aerenchyma. Leaf blades linear or broadly linear. Inflorescence usually a cylindrical spikelike panicle, rarely with spreading primary branches. Spikelets lanceolate, dorsally compressed, veins prominent, florets 2; lower glume usually about 1/3 spikelet length, base clasping; upper glume shorter than or subequaling spikelet, 5-veined; lower lemma as long as spikelet, 5-veined, apex acute to shortly awned; lower palea absent or much reduced; upper lemma membranous, rarely thinly cartilaginous, smooth, margins hyaline, gripping edges of palea below but free toward apex, apex acute.

Hymenachne is a genus of swamp grasses similar to Sacciolepis, and both are segregates from the large genus Panicum. The culms of Sac-ciolepis are hollow, but in Hymenachne they are filled with aerenchyma.

Five species: tropics of the Old World and New World; three species (one endemic) in China.

(Authors: Chen Shouliang (陈守良); Sylvia M. Phillips)


 

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Flora of China  
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