ICONES FILICUM SINICARUM 
PLATE 160 
ADIANTUM ROBOROWSKII Maximowicz 
POLYPODIACEZE 
ADIANTUM ROBOROWSKI! Maxomowicz, Mél. Biol. 11: 867 (1883); C. Chr. Ind. Fil. 33 (1905); 
Journ. Wash. Acad. Sci. 17: 498 (1927). 
Rhizome short, erect, densely scaly; scales rufo-brown, narrowly lanceolate, entire; 
fronds cespitose, stipe 6-10 cm long, slender, terete, castaneous, shining, rigid, lamina as 
long as stipe, 2-3 cm broad, lanceolate, bipinnate or subtripinnate at base; pinnae 5-7- 
jugate, under simple pinnate apical part, alternate, oblique, petiolate, the basal ones 
larger, 2-2.5 cm long, 1.5-2 cm broad, deltoid, rachilet castaneous, flexuose, pinnules 4-3- 
jugate, the basal pair generally forked, or very rarely pinnate, the upper ones simple, 
ultimate pinnule triangular or broadly ovate, entire, with cuneate base, and capillaceous 
castaneous petiole, the middle pinne generally simple pinnate with 1-2 pairs of pinnules; 
texture herbaceous, green, glabrous in all parts; veins visible against light, flabellulately 
forked, not reaching leaf-margin; sori generally 2 to each segment (not infrequently one), 
indusium orbicular, rufo-brown, coriaceous, attached to a deep notch at apex. 
Kansu: Tangut, N. M. Przewalski (1880), type; without locality, Purdom 78 (1910); 
Jarganar, south of Old Tao-chow, R. C. Ching 902 (1923); Moping, Man-yue-szai, Dr. D. 
Hummel 2292, 2310. 
A distinct endemic species of the group of A. venustwm Don and especially closely 
related to A. Faberi Baker, differing chiefly in smaller size, narrower leaves, smaller seg- 
ments of generally triangular shape. 
Plate. 160. Fig. 1. Habit sketch (natural size). 2. The same but young form (natural size). 
3. Ultimate pinnule. showing venation and sori (x 10). 4. Scale from base of stipe (x 30). 
