心叶薄唇蕨 xin ye bao chun jue

Gymnogramma cantoniense Baker, Hooker’s Icon. Pl. 17: t. 1685. 1887; Campium cantoniense (Baker) Ching; Christopteris cantoniensis (Baker) Christ; Dendroglossa cantoniensis (Baker) Copeland; Drymoglossum cordatum Christ; Leptochilus cordatus (Christ) Ching; Myuropteris cordata (Christ) C. Christensen; Polypodium cantoniense (Baker) Baker.

Rhizome 1-2 mm in diam., rounded, with only scattered strands of sclerenchyma; sclerenchyma strands 10-50; roots sparsely set; scales pseudopeltate, densely set, slightly spreading, ovate or triangular, broadest below middle, 1.5-2.5 × 0.5-1 mm, margin entire or denticulate, apex acute, center with multiseptate hairs at least when young; phyllopodia obscure. Fronds strongly dimorphic; stipe present, 1-11 cm, 0.5-1 mm in diam.; lamina simple, ovate to deltoid, 2-7 × 1.5-4 cm, 1.6-2 × as long as broad, thinly herbaceous to herbaceous, base truncate to truncate-decrescent to cordate, auriculate, margin entire, apex rounded. Fertile fronds: stipe 12-30 cm; lamina linear, 1.5-15 × 0.1-0.5 cm; each costal areole giving rise to 2 lateral veins, thus lateral veins seemingly branching at or near costa, costal areole bordered by several smaller areoles; veins 1-2 mm apart, ± sunken and indistinct, zigzag, dichotomously branched near margin, a prominent basiscopic (or sometimes acroscopic) connecting vein dichotomously branching off near costa, 2 or 3 between adjacent secondary veins, smaller veins ± sunken and indistinct, marginal vein absent. Sori acrostichoid; paraphyses present, simple uniseriate hairs with glandular terminal cells.

On rocks along streams. Guangdong, Hainan [Vietnam].