福氏肿足蕨 fu shi zhong zu jue

Nephrodium fordii Baker, J. Bot. 27: 177. 1889; Hypodematium humile F. G. Wang & F. W. Xing.

Plants (8-)35-50 cm tall. Rhizomes prostrate, densely scaly together with swollen stipe base; scales reddish brown, lustrous, narrowly lanceolate, (0.9-)1-1.5 cm × 1-2 mm, membranous. Fronds approximate; stipe stramineous, (4-)15-20 cm × ca. 1.5 mm, thin, upward with sparse golden, rod-shaped, short glandular hairs; lamina ovate-pentagonal, (4.5-)15-20 × (5-)12-18 cm, herbaceous, both surfaces with sparse golden glandular hairs, densely covered on rachis, costae, and costules with glands, broadly cordate and 4-pinnate at base, acuminate and pinnatifid at apex; pinnae (6 or)7 or 8 pairs, subopposite, oblique; basal pair largest, triangular-ovate, 8-13 × 6-9 cm, base subcordate, with a 1-2 cm stalk, 3-pinnate, 4-5.5 cm apart from second pinnae, apex acuminate; ultimate pinnules ca. 15 pairs, nearly connected, oblong, cuneate and decurrent at base, pinnatifid, apex obtuse; segments 3 or 4 pairs, oblong, margin entire or with 1 or 2 crenations; second and upper pairs of pinnae gradually shorter, oblong, base cordate, apex obtuse or acute. Veins obvious on both surfaces, ending at margin. Sori 1 or 2 per segment, orbicular, small, at middle of veinlets; indusia grayish white, reniform, small, with sparse glandular hairs es-pecially along margins. Spores ellipsoid, bearing inflated folds.

Limestone crevices; below 900 m. Anhui, Fujian, Guangdong, Guizhou (Guiyang), Jiangxi [Japan].