5S. HUMATA. § 1. fiUliUMATA. ISH 



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



h. Lowest primary segments simple or pinnatifid, not much broader or 

 larger than the \ following. 

 $. Rhizome scaled adpressed. Stipes + 5 — iO c.M. long. 



(3). H. Gaimardiana. 

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



(4j H. sessilifolia. 

 b.b. Lowest primary segments at least pinnatifid, distinctly broader or 

 larger than the higher once. £f-tto-wT/y^-^ 



c. Fronds wmform. -y^r '^o<-<. ■cy.^e^-^^j ^^ f^'^'^''^ '^f" 

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

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



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

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

 ■.1,1 Tiohet Iff ihp Imvpit primfiry—^ffmi'fi4^i^-fn'^~ 

 £^ ^fits. Primary segments deltoid-lanceolate. 



(6) H. pinnatifida. 

 ( i-Sit^ Primary segments linear-oblona. (7) H. pectinata. 



Fronds m oT o . or le s s- dimorphous ; -tT-er-lht- fertile segments narr-ower 

 than the-- barren ones- or the fertile fronds much larger than the 

 barren fronds. 7e» i 



1. Barren fronds small, _L ."'/jini^ c.M. long. 



;(c. Fertile fronds A_ m largo - ae the bai'i-vn ones, - with the 



segments contracted. Mil d/mijrfy hMt uaJr (9) H. pusilla. 



>(c.>|c. Fertile fronds much larger than Iho barren ohcs ; with 



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



±.1. Sothr3arren and fertile fronds_4 — 20 c.M. long when fully 



developed. 



2. Fertile fronds with the segments not toothed. 



(11) H. neoguineensis. 

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

 very sharp. * 



I 3. Lowest pinnae of barren fronds pinnatifid or 

 \ pinnate, at best 2-pinnatifid at the very base. 



4:. Secondary segments entire or crenate in the 

 barren fronds. (12) H. alpina. 



