• Scientific Name: Isoetes sinensis Palmer
• Ref: Amer. Fern J. 17:111. 1927
• English Common Name: Chinese quillwort
• Chinese Common Name: 中华水韭 Zhōnghuá shuǐjiǔ, 华水韭 Huá shuǐjiǔ
• Japanese Common Name: シナミズニラ [シナ水韮] shinamizunira
• Family: Isoetaceae
• Genus: Isoetes
• Distribution: Shallow water, beside ponds, sludge in gullies, intertidal zones along rivers and in streams; 100-300 m. Anhui (Dangtu, Tunxi, Xiuning), Guangxi (Guilin), Jiangsu (Nanjing), Zhejiang (Hangzhou, Jiande, Lishui, Zhuji).
• Photo: 04/19/2013, Chenshan Botanical Garden, Shanghai
• Note: Also spelt as Isoëtes sinensis

Plants helophytic, 15-30 cm tall. Rhizome slightly 2- or 3-lobed, bearing numerous forked roots. Microphylls 20-90 tufted, erect to spreading, imbricate adaxially, bright green, linear, 15-30 cm, 1-2 mm wide, succulent, herbaceous, apex acuminate, base broadly sheathlike, membranous, yellowish white, concave adaxially; peripheral fibrous bundles present; central intrastelar canals 3 or more. Ligules triangular, 2-3 mm, acuminate. Sporangia with white membranous velum cover. Megasporangia ca. 9 mm, ca. 3 mm in diam.; megaspores few, white, granular, tetrahedral, 330-475 μm in diam., proximal hemisphere spinulose to spinulose-cristate, distal hemisphere cristate. Microspores numerous, gray, powdery, dihedral, 25-30 μm, spinulose. Spores mature late May to end of Oct. 2n = 44*. (Flora of China)