726 80. POLYBOTRYA, § 4. ARTHROBOTRYA. 



+ 30 c.M. long. Barren fronds 50 — 80 c.M. long, 20—^30 c.M. broaji^eWong- 

 ovate. Pinnae numerous, articulate to the rachis, stalked^ratbefSistant, spread- 

 ing, lanceolate, pinnate. Pinnulae rhomboidal^^^,a»ti(!liIate, unequal-sided, the 

 lower base narrow-cuneate, the uppej,,^Hr6re broadly cuneate and often + 

 auricled, the edge deeply tootJ)**'''Texture herbaceous; costae and veins con- 

 spicuous, scaly. Fgptite'n'onds with the pinnulae contracted, blunt, often 

 sessile. ^ — ' 



^^-''^yVnim-, np.lp.hpsq}, A tJu>. Ph.iU.pj,ir,As armss Mp.Innp.nn 



81. STTETVOSEIMIA., JPreW. 



Sori indefinite, densely covering the dorsal or both surfaces of the much 

 contracted linear segments of the fertile fronds. 



Rhizome short. Stipes not articulate to the rhizome. Fronds dimorph- 

 ous, 3 — 5-angular in general outline, the basiscopical side of the lower seg- 

 ments strongly developed; veins anastomosing ± as in Pleocnemia, i. e. form- 

 ing 1 — '2 rows of areolae against the costae and costulae. Hk. Bk., Syn. 

 Fil., tab. VII, fig. 60, t— u; Diels, in Engl. & Prantl, Nat. Pfl.Fam., 1\ fig. 

 105, A-B. 



Malayan and Polynesian. 



S. ■ Barren fronds lernale, + ^—30 c.M. long. (1) S. aurita. 

 $.$. Barren fronds pinnate. 



iif.. Barren fronds ± 30 c.M. long. (2) S. pinnala. 



)|c.*. Barren fronds 45—90 c.M. long. (3) S. Teysmanniana. 



• (1) S. aurita, l»r., Copel., Polypod. Philipp., 41 ; Pr., Tent. 

 Pterid., tab. X, fig. 24; Diels, in Engl. & Prantl, Nat. Pfl.Fam., P, fig. 105, 

 A— B ; Acrostichum aurilum, Sw., Rac, Flor. Btz., I, 52 ; Polybolrya aurita, Bl , 

 Hk., Fil. Exot., tab. LXXXI; Gymnopleris aurita. Keys., Christ. Farnkr. d. Erde, 

 fig. 124; — var. minor, Christ, Fil. Saras., Ill, 252. 



Rhizome short-creeping or erect, firm, the scales blackish, lanceolate. 

 Sterile fronds ternate, 20—30 c.M. each way, the central segment deeply pin- 

 uatifid with oblong, blunt or acute, straight or subfalcate, entire or crenate 



