﻿734 86a. poecilopteris. leptochilus. 



^. Barren fronds i — i'/2 ^•^^- broad. Areolae without free veinlets. 



(2) L, Linnaeanus. 

 :^.iii. Barren fronds 4 — iO c.M. broad. Areolae with free veinlets. 



(3) L. decurrens. 

 a.a. Barren fronds typically 3-fid, hut sometimes simple or pinnate. 

 X. Segments of the fertile fronds lanceolate-oblong, rather short. 



(4) L. trifidus. 

 X'X. Segments of the fertile fronds narroivly linear, rather long. 



(5) L. latifolius. 

 a.a.a. Barren fronds typically 3-foliale or pinnate, but some of them sometimes 

 simple, or very rarely 2-pinnate in No. 10a. 

 b. Fronds pedatisect. (6) L. HoUrungii. 



h.h. Barren fronds with i — 6 pairs of lateral pinnae. 

 c. Fronds small, under i2^j^ c.M. long. 



+. Lateral pinnae i-jugate. (7) L. zeylanicus. 



-i-.+. Lateral pinnae 2—6-jugate. (8) L. inconstans. 



c.c. Fully developed fronds larger, more than i2^l^ c.M. long. 



d. Lateral pmnae truncate at the base, the edge I roadly crenate 

 arid finely toothed. (9) L. prolifer. 



d.d. Lateral pinnae cuneate or rounded at the base, the edge entire, 

 repand, toothed or sinuate. 



e. Fronds scattered. ■ (10a) L. heteroclitus. 



(106) L. stolonifer. (*) 

 e.e. Fronds approximate. (11) L. diversifolius. 



b.b.b. Barren fronds as a rule copiously pinnate. 

 1. Fronds to 30 c.M. long. 



§. Pinnae entire or crenate. 



^. Pinnae entire, acuminate, narrowed at the base. 



(12) L. Preslianus. 

 i(i.-^. Pinnae crenate, acute, truncate at the base. 



(13) L. exsculptus. 

 §.§. Pinnae lobed. (14) L. celebicus. 



1.1. Fully developed fronds mostly 30 — lO c.M. long. 



2. Pinnae herbaceous or subchartaceous, under 4 c.M. broad. 

 3. Rachis narroivly winged. Pinnae under 8 c.M. long. 



(15) L. vireiis. 



(*) I don 't know whether this species is well-classified here. 



