ICONES FILICUM SINICARUM 
PLATE 100 
PHYMATODES NIGROVENIA (Christ) Ching 
POLYPODIACEAE 
PHYMATODES NIGROVENIA (Christ) Ching, Contr. Bot. Inst., Nat. Acad. Peiping 2: 
79 (1933). 
Polypodium nigrovenium Ching, Bull. Fan Mem. Inst. Biol. 1: 150 (1930). 
Polypodium shensiense Christ var. nigrovenium Christ, Bull. Acad. Géogr. Bot. (1906) 106. 
Polypodium Vettchit Baker var. nigrovenium Takeda, Notes, R. Bot. Gard. Edinb. 8: 296 
(r915); C. Chr. Acta Horti Gotob. 1: 102 (1924). 
Rhizome rather slender, wide-creeping, about 1 mm thick, densely scaly; scales 
ovate-lanceolate, black, firm, denticulate; frond far apart, stipe 3-6 cm long, straminous, 
naked, lamina oblong-ovate, 5-8 cm long, 4-5 cm broad, cordate at tase, simple pinnate 
pinnae 2-4 pairs, the basal pair strongly deflexed and much the longest, the upper ones 
gradually decrescent, patent or oblique, margin remotely serrulate; texture chartaceous, 
color green, more or less shortly glandular pubescent especially along the midrib and 
costa above, pale green and glabrous underneath; vezms distinct, rather regularly 
anastomosing in two rows of areolae on each side of costa, each provided with one, or 
two, forked including veinlets; sori small, uniseriate, naked.. Re 
Hupeh: Changyang Hsien, E. H. Wilson 5341A (type). Szechuan: Mt. Omei, 
P. W. Fang 2966, 2985 (1928), on cliff and on the trunk of trees. 
Habit exactly similar to Ph. V eitchii (Baker), differs in black, firm rhizome scales and 
shortly glandular pubescence on the upper surface of lamina. Polypodium erythrocarpum 
Mettenius from Sikkim-Himalayas appears to be a still closer ally to the present fern, 
differs in leaves being more densely pubescent on both sides, and scales of a lighter color. 
Plate 100. Fig. 1. habit sketch (natural size). 2. a portion of lamina, showing pubescent 
upperside (x5). 3. a portion of lamina, showing glabrous underside and position of sori (x5). 
4. articulated hair from upperside of lamina (magnified). 5. scales from rhizome (X50). 
