45a. PTERIS. § 1. EUPTERIS. C*. BIPINNATIFIDAE. _ 365 



Stipes 15 — 45 c.M. long, naked, erect, pale-coloured. Fronds 30-65 c.M. 

 long, 15 — 25 c.M. broad, ovate-lanceolate, pinnate. Terminal pinna with the 

 lower half sinuate and furnished with a few short, linear lobes. Lateral 

 pinnae usually in 4 — 6 opposite pairs, erecto-patent, the higher ones linear- 

 lanceolate, 7'/j — 15 c.M. long, + 1 c.M. broad, simple or here and there 

 with 1 — 2 lobes or ears near the base, lower pinnae 5 — 10 c.M. apart, 

 10 — 30 c.M. long, cut down nearly to the costa with + 4 — 6 oblong or 

 linear-oblong, + spreading lobes on each side near the base below the often 

 very long terminal segment, the lateral lobes varying from very short to ± 

 2*/j c.M. long, Vi"^l ^■^- broad, the margin entire or sinuato-subcrenate, 

 the apex provided with 1 — 5 minute spines. Texture subcoriaceous ; rachis 

 and both surfaces: naked; the margin rather sligh I ly crisped; veins conspi- 

 cuous, usually once forked. Indusium narrow, membranaceous. — Very 

 variable; the lowest pinnae sometimes with 1 — 12 lateral lobes on each side. 

 The javan plant found by Mr. Buysman has the lobes of the terminal pinna 

 in + 9 pairs, linear, to 4 c.M. long. 



Java (Pasuruan), Celebes, Philippines; Burmah. 



* (20) Pt. Dalhousiae, MU., Hk. Bk., Syn. Fil, 157; Hk., Spec. 

 Fil., II, 170, tab. CXXI, A. 



Rhizome short. Stipes + clustered, strong, erect, reddish-brown and 

 naked like the rachis, polished, + 30^40 c.M. long. Fronds oblong, 30 — 60 

 c.M. long, the apex deeply pinnatifid with + 5 erecto-patent, distant, linear, 

 acuminate segments below the long terminal one, + slightly joined by their 

 suddenly dilated, decurrent bases; below this + 4—5 distant, erecto-patent, 

 upcurved, + stalked pinnae on each side. Higher pinnae with a long, undivided, 

 acuminate terminal segment, and with the lower side provided with 1—4 

 lateral segments similar to those of the apex of the frond, the upper side 

 undivided, (+ as in Pt. semipinnata, L., but the segments distant), central and 

 lower pinnae similar, but with 4 — 5 segments on the lower and a few similar 

 ones on the upper side near the base (+ as in Pt. dispar, Kze), lower 

 pinnae 20—30 c.M. long, with the lowest segment on the lower side simple, 

 or divided like the upper pinnae. Ultimate sesments linear, upcuirved, acu- 

 minate, the longest 10- 15 c.M. long, 5 — 8 m.M. broad in both barren and 

 fertile fronds, the edges finely crenate in the barren region. Texture firm; 

 rachis polished; surfaces naked; veins distinct, simple or forked, the apices 

 not thickened. 



Java, Sumatra, Penang. 



