Family

Pteridaceae

Nomenclature

Pteris deltodon Baker, J. Bot. 26: 226. 1888; Tardieu & C.Chr., Fl. Indo-Chine 7(2): 145. 1939.

Description

Description from Liao Wenbo et al., Pteridaceae [Draft] from Flora of China at http://flora.huh.harvard.edu/china/mss/volume02/Pteridaceae-MO_reviewing.htm

Plants 15-25 cm tall. Rhizome erect, short, ca. 1 cm in diam., apex with black-brown scales. Fronds clustered, monomorphic; stipe brown at base, upper part straw-colored, slightly lustrous, 10-20 cm × 1-2 mm; lamina ovate to triangular-ovate, 10-20 × 4-7 cm, 3-forked or pinnate; pinnae 3-5; apical pinnae broadly lanceolate, 5-8 cm, middle part 1.2-2 cm wide, base broadly cuneate, sessile or shortly stalked, sterile margins triangular-serrate toward apex, remainder entire, apex acuminate; lateral pinnae smaller, decumbent, opposite, falcate, base obtuse and oblique, sessile, apex mucronate; sterile fronds similar to fertile fronds in shape but shorter and wider, apical pinnae oblong-lanceolate, lateral pinnae ovate, margins serrate except at base; lamina light brown, papery when dried, glabrous on both surfaces; costae straw-colored, abaxially convex; veins conspicuous, simple or forked .

Distribution in Laos

Khammouane.

Wider Distribution

China, Japan, Vietnam.

Proposed IUCN Conservation Assessment

Least Concern (LC). This species is widespread and not under any known threat.