剑叶书带蕨 jian ye shu dai jue

Vittaria amboinensis Fée, Mém. Foug. 3: 14. 1852; Taeniopsis amboinensis (Fée) Beddome; V. chingii B. S. Wang; V. ensata Christ; V. latifolia Ching (1959), not Benedict (1914); V. lauana Ching.

Rhizome thick, long creeping, bearing roots with very numerous water-absorbing root hairs; scales dark brown, obscure iridescent, subulate-lanceolate, 3-5 mm, ca. 0.5 mm wide at base, margin prominently denticulate, apex acuminate, apical areole not transparent, wall thick, obviously verrucate, dark colored. Fronds clustered, 2-4 mm apart; stipe 4-10 cm, slender, appressed, base covered with scales; lamina stiffly papery, or thinly leathery, brown when dry, lanceolate, 20-40 × 1-2.5 cm, gradually narrowed to both ends, base long attenuated along stipe, margin slightly revolute when dry, apex long acuminate; costa ± invisible and narrowly concave adaxially, raised abaxially, flattened, veins evident. Soral line submarginal, superficial, or slightly immersed, infra-medial and apical part sterile; paraphyses many, long, with head obconic, ca. 2 × as long as wide. Spores monolete, oblong in outline, surface papillate.

Epiphytic or epilithic in evergreen forests. Guangdong, Guangxi, Hainan, Yunnan [Cambodia, N India, Indonesia, Japan, Laos, Malaysia, Myanmar, Thailand, Vietnam].