尖齿铁角蕨 jian chi tie jiao jue

Replaced synonym: Asplenium argutum Ching, Acta Phytotax. Sin. 23: 9. 1985, not A. argutum Kaulfuss, Enum. Filic. 176. 1824.

Pinnae with acute marginal teeth. Spores with lophate perispore with rounded crests (costate to costate-cristate) and very few pori (less than 1 µm in diam.), middle perispore present in areoles between outer perispore folds.

● On rocks in forests; 2600-3600 m. Sichuan.

All specimens of Asplenium tenuicaule var. argutum come from relatively high elevations in C Sichuan. They have slightly longer stipes and relatively long marginal teeth; perispore characters are constant. Due to confusion with similar taxa, the distribution of this taxon is not well known.