447 



% 1. EUMARATTIA. 



1. Main racliis rather densely scaly. 



* Scales not blackish. - (1) M. vestita. 



•• Scales UacMsh. (la) M. squamosa. 



*.*. Main racMs not densely seedy. 



2. Largest lateral leaflets at least about 2 cm. broad tohen fertile. 

 a. Largest synayigia at least 12-celled. 



V Under surface naked. (6) M. ternatea. 



VV Under surface more or less squamulose. (6a) M. papuana. 

 «.«. Largest synangia at best 12-celled. 



h. Synangia 6 — 8-celled. (66) M. obesa. 



6.6. Synangia 8 — 12-celled. 



c. Leaflets 2 — S'/j cm. broad. 



tl. Under surface not naked. (7) M. Smitliii. 



(7a) M. Teysmanniana. 



d.d. Under surface naked. (lb) M. rugulosa. 



c.c. Leaflsts 3 — 3% cm. broad. (7c) M. grandifolia. 



2.9. Largest lateral leaflets at best about 2 cm. broad when fertile. 



3. Veins partly simple partly forked., the stipes neither tuberculate 

 nor rugulose. 

 o Texture herbaceous or membranaceous. 



+ Leaflets suddenly acuminate. (4) M. pellucida. 



++ Leaflets not suddenly acuminate. (5) M. fraxinea. 

 GO Texture coriaceous or chartaceous. 



+ Leaflets not caudate. (5a) M. paleolata. 



++ Leaflets caudate. {5b) M. caudata. 



3.3. Veins simple, or the stipes tuberculate or rugulose. 

 A. Largest synangia at least 12-ceUed 



D Leaflets moderately small. (3) M. silvatica. 



DD Leaflets rather large or micldle-sised. (6) M. ternatea. 

 4E./S. Largest synangia at best 12-celled. 



5. Leaflets beneath not albo-punctidate or verruculose. 

 O Rachis tubercidate; leaflets mostly muUijiigate. 



(2) M. sambucina. 

 O O Rachis rugulose, or the leaflets to S-jugate. 



(2a) M. Brooksii. 



