2. Dipteris conjugata Reinwardt, Syll. Pl. Nov. 2: 3. 1825.
双扇蕨 shuang shan jue
Phymatodes conjugata (Reinwardt) C. Presl.
Rhizome to ca. 1 cm in diam., covered with hairlike scales; scales reddish brown, narrow, to 1.2 cm, stiff. Stipe stout, 40-120 cm, with hairlike scales at base, otherwise smooth and glabrous; lamina glaucous abaxially, dark green adaxially, 25-50 × 50-70 cm, leathery, glabrous, divided to base into 2 fan-shaped halves, each half deeply divided into 4 unequal lobes 4-5 cm wide, lobes less deeply divided 1 or more times, with 10-20 or more ultimate lobes in each half of lamina; lobe tapering into narrow, acute apices, margins coarsely toothed; venation prominent abaxially. Paraphyses club-shaped.
Terrestrial in clearings, ridges, forest margins; 500-1200 m. Hainan, Taiwan [Cambodia, India, Indonesia, Japan (S Ryukyu Islands), Malaysia, Philippines, Thailand, Vietnam; Pacific islands].