7. Oreogrammitis sinohirtella Parris, sp. nov.
隐脉滨禾蕨 yin mai bin he jue
Type: China. Guangdong: Tsung-hwa District, Cheung Uk village, Sam Kok Shan, 1-16 Mar 1935, W. T. Tsang 24913 (holotype, E! [barcode 00194227]; isotype, LU).
Oreogrammitis sinohirtella resembles O. reinwardtii in having the acroscopic vein branch very short and not extending beyond the sorus, but it differs in having the veins invisible. It differs from O. hainanensis in having a shorter stipe and lamina and mostly longer stipe hairs.
Stipe 0.3-1.1 cm, with dense simple solitary pale to dark reddish brown hairs 0.2-1.8 mm; phyllopodia absent. Lamina narrowly elliptic to narrowly oblanceolate, 1.4-5.4 × 0.2-0.7 cm, gradually attenuate or cuneate to stipe, margin entire, apex obtuse to acute; midrib brown to dark brown, slightly prominent abaxially, sometimes slightly prominent adaxially; lateral veins hidden, 1-forked, acroscopic branch shorter than basiscopic branch, not extending beyond sorus, endings with hydathodes; hairs sparse to dense on all parts of lamina, simple, solitary, medium to dark reddish brown, 0.1-3.1 mm. Sori orbicular or elliptic, superficial, close to midrib. Sporangia setose.
Rupestral in mountain forests; 700-1400 m. ?Fujian, Guangdong, Guangxi, Guizhou, Hunan, ?Jiangxi, ?Zhejiang [Thailand, Vietnam].