连珠蕨 lian zhu jue

Dryostachyum meyenianum (Schott) Brause; Pleopeltis meyeniana (Schott) Alderwerelt; Polypodium meyenianum (Schott) Hooker; Psygmium elegans C. Presl.

Rhizome shortly creeping, 2-3 cm in diam. or more; dilated frond bases imbricate; rachises not persistent. Rhizome scales spreading, pseudopeltate, 6-15 × 0.4-1(-1.3) mm, basal auricles short, apex narrowly acuminate to long filiform, strongly dentate; midrib absent. Fronds internally dimorphic, sessile, dilated base lobed, upward pinnatifid, 35-90 × 15-30 cm, glabrous or abscission vein with tufts of very short acicular hairs, apical pinna present. Sterile pinnae without basal constriction, 7.5-15 × 1.5-3.5 cm, apex rounded or acute to acuminate. Fully fertile pinnae in upper 2/3 of frond, distinctly narrowed, up to 5-20 × 0.4-0.8 cm, contracted between sori. Soral patches in 1 row along pinna midrib, protruding and beadlike, orbicular, 1-3 mm wide. Sporangia glabrous. Spores verrucate.

Epiphytic, forming a ring-shaped basket around tree trunks, or epilithic, or terrestrial, usually in exposed areas in primary forests; 100-800(-?1600) m. E and S Taiwan [Philippines].