ICONES FILICUM SINICARUM 
PLATE 155 
PLAGIOGYRIA ASSURGENS Christ 
POLYPODIACE/E 
PLAGIOGYRIA ASSURGENS Christ, Bull. Soc. Bot. Ital. (tg0r) 293; C. Chr. Ind. Fil. 495 
(1905).; Cop. Phil. Journ. Sci. 38: 398 (1920). 
Lomaria deflexa Baker (non Col. 1844, nec Liebm. 1849), Journ. Bot. (1888) 226. 
Blechnum Fabert C. Chr. Ind. Fil. 153 (1905). 
Rhizome thick, woody; fronds caespitose, dimorphous, sterile one with stipe to 20 
cm long, rigid, dark straminous, terete beneath, broadly grooved above, base flattened, 
carinate, with 3 aerophores on each of exterior sides, lamina oblong-lanceolate, quite 
narrowed at base, to 30 cm long, 10 cm broad at middle, simple pinnate with pinnatifid 
acuminate apical part; pinnae 30-35-jugate, linear-lanceolate with upper side of base 
running upward, the lower several pairs gradually shortened and strongly deflexed, the 
middle ones to 8 cm long, 8 mm broad, horizontally patent, entire except the acuminate 
apex being with a few obsure teeth, the upper pinnae gradually shortened and oblique; 
texture subcoriaceous, glabrous in all parts, green above, glaucous or bluish-white (or 
green when young) underneath; veins distinct on both sides, oblique, mostly forked; 
fertile frond strongly contracted, on longer stipe (to 40 cm long), lamina linear-lanceolate, 
5 cm broad; pinnae contracted, linear, to 3 cm long, 2 mm broad, base broadly adnate; 
sort indefinite, completely covering the under surface, except the midrib. 
Szechwan: Tien-to-san, Scallan (type); Mt. Omei, Wilson 5284; E. Faber 1023 
(type of Lomaria deflexa); Tah Liang Shan, T. T. Yiu 4045, Sept. 22, 1934. 
This distinct endemic fern, so tar collected only thrice in mountains in the 
southwestern part of Szechwan, is closely related to P. adnata of the same region in 
general outline, differs in shortened and strongly deflexed lower pinnae and the glaucous 
underside of lamina, less serrated apice of sterile pinnae and broadly adnate base of 
fertile pinnae. Lomaria deflexa Baker represents only a young state of this species, 
having thinner leaves, less prominent veins and green color beneath. 
Plate. 155. Fig. x. Habit sketch (natural size). 2. Pinnae, showing venation and serrature 
(x 2). 3. Portion of fertile pinnz, showing position of sori ( x 16). 
4—5. Sporangium with spores 
(x 150). 
