秦岭金星蕨 qin ling jin xing jue

Plants 45-60 cm tall. Rhizomes ascending. Fronds subclustered; stipes 10-20 cm, bases dark brown, with sparse brown broadly ovate scales, distally stramineous, glabrous; laminae oblanceolate, 35-45 × 8-11 cm, gradually tapering to bases, pinnate-pinnatifid, acuminate and pinnatifid at apices; pinnae ca. 25 pairs, proximally gradually shortened into small auricles, lowest ones tuberculate; middle pinnae alternate, spreading, sessile, lanceolate, 4-6 × ca. 1 cm, bases symmetrical and slightly broader, subtruncate, pinnatifid nearly to costae, apices long acuminate; segments ca. 18 pairs, spreading, oblong-lanceolate, 4-6 × ca. 2 mm, entire, obtuse at apices. Veinlets evident, simple, 5 or 6 pairs per segment, proximal pair arising from bases of costule. Laminae thickly herbaceous, grass-green when dry, abaxially with orange-yellow spherical glands, costae, costules, and margins with dense grayish white spreading fine acicular hairs, adaxially along grooves and veins with appressed short setae, along rachises with sparse long hairs. Sori orbicular, 3-5 pairs per segment, dorsifixed near ends of veinlets and close to margins; indusia medium-sized, orbicular-reniform, brown, membranous, with more setae, persistent. Spores bilateral, orbicular-reniform, perispores corrugate and obviously finely reticulate on surfaces, exospore finely reticulate.

● Pinus armandii forests, common; ca. 1800 m. Gansu, Shaanxi.

Parathelypteris qinlingensis differs from P. nipponica in having rhizomes ascending, fronds subclustered, pinnae with more orange-yellow spherical glands, fine acicular long hairs abaxially, and indusia densely covered with setae.