﻿3^. HUMATA. § 1. EUHUMATA. ^SB 



n.a. Barren fronds varying from pinnatifid to 3-pinnate. 



h. Lowest, primary segments simple or pinnati/id, not much broader or 



larger than the higher ones. 



$. Rhizome scales ad/pressed. Stipes + 5 — iO c.M. long. 



(3) H. Gaimardiana. 



$.$. Rhizome scales spreading. Stipes ivanting or to + 5 c.M. long. 



(4j H. sessilifolia. 



b.b. Lowest primary segments at least pinnati/id, distinctly broader or 



larger than the higher ones. 



c. Fronds uniform. 



d. All the divisions very narrow, almost filiform, at utmost i 



m.M. broad. Fronds under 5 c.M. long. (5) H. parvula. 



d.il. The divisions not almost filiform, at least 3 m.M. broad. 



Fully developed fronds 5 — 20 c.M. long. 



e. Lobes of the lowest primary segments entire. 



f. Primary segments deltoid-lanceolate. 



(6) H. pinnatifida. 



f.f. Primary segments linear-oblong. (7) H. pectinata. 



e.e. Lobes of the lowest primary segments crenate or lobed, 



(8) H. repeiis. 



c.c. Fronds more or less dimorphous; i. e. the fertile segments narrower 



than the barren ones or the fertile fronds m\ich larger than the 



barren fronds. 



1. Barren fronds small, + 2^1^ — 4 c.M. long. 

 t. 



■^. Fertile fronds + as large as the barren ones, with the 



segments contracted and sharply toothed. (9) H. pusilla. 



•^.if.- Fertile fronds much larger than the barren ones, with 



the segments not contracted. (10) H. lepida. 



1.1. Both barren and fertile fronds 4—20 c.M. long when fully 



developed. 



3. Fertile fronds with the segments not toothed, 



(11) H. neoguineensis. 



2.3. Fertile fronds with the segments toothed, the teeth often 



very sharp. 



3. Lowest pinnae pinnati/id or pinnate in the barren 



fronds. 



A. Secondary segments entire or crenate in th& 



barren fronds. (12) II. alpina. 



