ICONES FILICUM SINICARUM 
PLATE 138 
ADIANTUM DAVIDI Franchet 
POLYPODIACEA 
ADIANTUM DAVIDI Franchet, Nouv. Arch. Mus. II. 10: 112 (1887); Diels in Engl. u. 
Prantl: Nat. Pflanzenfam. 1: 4. 284 (1899); Christ, Bull. Soc. Bot. France 
52: Mém. 1. 62 (1905); Bull. Acad. Géogr. Bot. (1906) 136; C. Chr. Ind. Fil. 
25 (1905); Acta Hort. Gothob. 1: 94 (1924); Contr. U. S. Nat. Herb. 26: 310 
(1931). 
Adiantum aristatum Christ, Bot. Gaz. 51: 345 (1911): C. Chr. Ind. Fil. Suppl. I. 4 (rgr2); Bot. 
Gaz. 56: 331 (1973). 
Adiantum Davidi var. aristatum C. Chr. Acta Hort. Gothob. 1: 94 (1924). 
Adiantum monochlamys var. latedeltoideum Christ, Nuov. Giorn. Bot. Soc. Ital. n.s. 4: 88 (1897). . 
Adiantum latedeltoideum C. Chr. Acta Hort. Gothob. 1: 94 (1924). 
Adiantum venustum Christ, (non Don) Bull. Soc. Bot. France 52: Mém. 1. 62 (1905). 
Adiantum monochlamys C. Chr. Bot. Gaz. 56: 331 (1913). 
Rhizome wiry, wide-creeping, densely scaly at growing tip; scales nitide, 
atro-brown, ovate-lanceolate, entire; frond far apart, stipe slender, firm, terete, 
glossy, castaneous, 10-20 em long, glabrous above the scaly base, lamina deltoid- 
ovate, much shorter than Stipe, tripinnate; pinne 3-5-jugate under elongate pin- 
natifid apex, all petiolate, basal ones much the largest, deltoid-lanceolate, to 7 cm 
long, 3-4 em broad; pinnules oblong, petiolulate, obtuse, with 1-4 pairs of ultimate 
close pinnules which are of flabellate shape with rounded, aristately serrate outer 
margin, distinctly petiolulate, 4-7 mm each way, rachis, rachilets, costa and 
petiolules shining castaneous; texture crass herbaceous, surfaces glabrous, green 
above, more or less glaucous underneath; veins fine, flabellately forked, more or 
less projecting out from the sharp teeth; sori medium-sized, generally solitary to 
each ultimate pinnule, indusium brown, thick, rotundo-reniform, 2-8 mm long, 
with the sterile margin on both sides aristately serrate. 
Szechwan: Moupin, Darid (type) (1870); Tchen-kou-tin, Farges 689; Yen- 
guen, Handel-Mazzetti 2789; Wilson 5254 (type of A. aristatum); Mo Tien Ling, 
F. T. Wang 22453; Teng-hsiang-ying, Harry Smith 1918; Drogochi, Harry Smith 
4948. Yunnan: The Red River, Mo-so-yu, Delavay 1698; Hokin, Delavay 1198; 
Lonkong, Yen-tze-hay, Delavay 1878, 1687; Teng Kou valley, Forrest 12483; Yung- 
peh Mt., Forrest 17049; Ducloux 3368. Shensi: Lun-san Huo, Giraldi, Oct. 1895: 
Miao-nan Shan, Giraldi, Jan. 1899; Thai-pei Shan, Giraldi August, 1893; August 
10-20, 1894 & 1895; Purdom 79 78; ibid., Hopingsze, K. S. Hao 4272, Sept. 12, 1932. 
Tibet Border: Capt. Kingdon Ward 479 (1918). 
Burma: Simila, Burhe 23 (1867). 
This distinct endemic species belongs to the group of A. venustum Don of 
Northern India. The underside of leaves sometimes appears conspicuously 
glaucous, or sometimes only bluish as in A. aristatum. A. latedeltoidewm ©. Chr. 
from the southern part of Shensi is only a somewhat ampler form; and most speci- 
mens from the same region have ultimate pinnules rolled up, due evidently to 
the dry habitat. 
Plate 138. Fig. 1. Habit sketch (natural size). 2. Pinnule (x 8). 3-4. Scales from rhizome 
xX 25). 
