细毛碗蕨 xi mao wan jue

Davallia hirsuta Swartz, J. Bot. (Schrader) 1800(2): 87. 1801; D. pilosella Hooker; Dennstaedtia pilosella (Hooker) Ching; Fuziifilix pilosella (Hooker) Nakai & Momose; Humata hirsuta Desvaux; Microlepia lipingensis P. S. Wang; M. pilosella (Hooker) T. Moore; Trichomanes japonicum Poiret (1808), not Thunberg (1784).

Plants ca. 30 cm tall. Rhizome creeping or ascending, with dense, gray-brown, long hairs. Fronds ± clustered; stipe straw-colored, 9-14 cm, ca. 1 mm in diam., with dense, gray, articulate hairs when young, abscising to leave scabrous marks when old; rachis and stalk concolorous, rachillae with dense, gray, articulate hairs; lamina green or yellow-green when dried, 2-pinnatisect, oblong-lanceolate in outline, 10-20 × 4.5-7.5 cm, herbaceous, both surfaces with dense gray, articulate, long hairs, apex acuminate; pinnae 10-14 pairs, opposite or almost alternate, 1.5-2.5 cm apart, spreading obliquely upward or slightly curved, lower pinnae pinnatifid or pinnatisect, 3-5 × 1.5-2.5 cm, with short, narrowly winged stalk or almost sessile; ultimate segments 6-8 pairs, oblong or broadly lanceolate, 10-17 × ca. 5 mm, anadromous; basal acroscopic pinnules longest, parallel with rachis, base cuneate, decurrent and connected with costa, both sides lobed, apex sharply 2- or 3-serrate; lobules with 1-3 small sharp teeth at apex. Veins pinnate and furcate, not reaching tip of teeth, each small sharp tooth with one veinlet, hydathode obscure. Sori orbicular, axillary on lobules; indusium green, shallowly bowl-shaped, hairy.

Shaded rock crevices on mountains; 200-2200 m. Chongqing, Gansu, Guangdong, Guangxi, Guizhou, Heilongjiang, Hubei, Hunan, Jilin, Liaoning, Shaanxi, Sichuan, Taiwan, Zhejiang [Japan, Korea, Russia (Far East)].

Thunberg (Fl. Jap. 337. 1784) incorrectly applied the name Trichomanes hirsutum Linnaeus to this taxon.