ICONES FILICUM SINICARUM 
PLATE 162 
ONYCHIUM MOUPINENSE Ching 
POLYPODIACE/E 
ONYCHIUM MOUPINENSE Ching, Lingnan Sci. Journ. 13: 500 (1934) 
Rhizome wide-creeping, 1.5 mm thick, densely scaly; scales rufo-brown, subulate, 
firm; frond distant, dimorphous, sterile one narrowly linear elongate, stipe to 10 cm long, 
slender, pale straminous, lamina 10-15 cm long, 2-3 cm broad, slightly broader towards 
base, bipinnate; pinnae 10-15-jugate, rhombic, petiolate, basal pair to 3.5 cm long, upper 
ones 2 cm long, subunequally cuneate at base; pinnules 2-3-jugate, subrhombic, base 
slightly decurrent, apex obtuse; segments 2-3-jugate, small, 2-3-dentate; texture rather rigid, 
color green; fertile frond much longer and broader, stipe 15-20 cm long, straminous, lamina 
as long as stipe, broadly lanceolate, long-attenuate towards above middle, base to 6 cm 
broad, tripinnate; pinnae 10-15-jugate, long-petiolate, base unequally cuneate, basal pair to 
to cm long, 3 cm broad, long-acuminate towards simple pinnate apex; segments few, sili- 
queform, 10 mm long, 1.5 mm broad, acuminate; sori linear, 5-7 mm long, indusium con- 
forms, broad, gray, entire, reaching costule from both sides. 
Szechwan: Moupin, David (type). 
This species, confined to the highland of western Szechwan, differs from O. 
japonicum Kze. in much narrower and less divided frond and particularly the sterile one, 
which is of linear-elongate outline to 3 cm broad from somewhat broader base, and the 
fertile frond with extremely long-attenuate upper part. 
Plate 162. Fig. 1. Habit sketch (natural size). 2. Portion of sterile frond, showing venation 
(x 8), 3. Portion of fertile frond (x 8). 4. Ultimate segment of fertile frond, showing position of sori 
and indusia (x 16). 5. Scale from rhizome ( x a7)s 
