中日金星蕨 zhong ri jin xing jue

Aspidium nipponicum Franchet & Savatier, Enum. Pl. Jap. 2: 242, 636. 1879; Dryopteris nipponica (Franchet & Savatier) C. Christensen; Lastrea nipponica (Franchet & Savatier) Copeland; Thelypteris nipponica (Franchet & Savatier) Ching; Wagneriopteris nipponica (Franchet & Savatier) A. Löve & D. Löve.

Plants 40-60 cm tall. Rhizomes long creeping, subglabrous. Fronds approximate; stipes 10-20 cm, bases dark brown, ± covered with reddish brown broadly ovate scales, distally bright stramineous, glabrous; laminae oblanceolate, 30-40 × 7-10 cm, gradually tapering to bases, pinnate-pinnatifid, acuminate and pinnatifid at apices; pinnae 25-33 pairs, proximal 5-7 pairs subopposite, proximally gradually reduced into small auricles, lowest ones tuberculate; middle pinnae alternate, sessile, spreading, lanceolate, 4-5 × 0.7-1.2 cm, bases slightly broadened, symmetrical, truncate, pinnatifid nearly to costae, apices acuminate; segments ca. 18 pairs, slightly obliquely spreading, oblong, 3-5 × ca. 2 mm, entire or shallowly thickly serrate, rounded-obtuse at apices. Veinlets evident, simple, 4 or 5 pairs per segment. Laminae herbaceous, grass-green when dry, abaxially with grayish white, spreading, unicellular and mixed with few multicellular acicular hairs along costae and margins, interstitial region with dense micro-glandular hairs and few orange-yellow spherical glands; adaxially subglabrous except costae and veins with short acicular hairs. Sori orbicular, medium-sized, 3 or 4 pairs per segment, dorsifixed above middle of veinlets, far from costa; indusia medium-sized, orbicular-reniform, brown, membranous, with few grayish white long acicular hairs. Spores bilateral, orbicular-reniform, perispores corrugate, exospore regularly finely reticulate. 2n = 124.

On soil in open forests on hills, common; 400-2500 m. Fujian, Gansu, Guangxi, Guizhou, Henan, Hubei, Hunan, N Jiangsu, Jiangxi, Shaanxi, Shandong, Sichuan, Yunnan, Zhejiang [Japan, S Korea, Nepal].

Parathelypteris nipponica is similar to P. novoboracensis (Linnaeus) Ching in outline, but the latter plant, which grows along the Atlantic coast, differs in segments acute at apices and indusia glabrous at the back.