Description from Flora of China
Antrophyum reticulatum (G. Forster) Kaulfuss var. parvulum (Blume) Beddome; Hemionitis parvula (Blume) C. Presl.
Rhizome short erect; scales brown, lanceolate, margin minutely denticulate, clathrate. Fronds clustered; stipe indistinct, appressed, base covered with small scales, gradually glabrous; lamina leathery, oblanceolate, spatulate, or oblong, 1-6 × 0.5-1 cm, apex acuminate or rounded, often lacerate or bifurcate, base attenuate; costa indistinct or only visible at lower 1/3; veins abundantly reticulate, invisible on both surfaces. Soral lines slightly immersed, forked but not netted; paraphyses club-shaped with a capitate head. Spores trilete, tetrahedral-globose, surface papillate.
Antrophyum parvulum might be conspecific with A. immersum (Bory ex Willdenow) Mettenius, which needs further studies. It is quite different from A. obovatum by its small size and indistinct stipe.
Epiphytic on tree trunks or on limestone; 400-1600 m. Hainan, Taiwan [India, Indonesia, Malaysia, Philippines, Thailand, Vietnam].