CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Receptacles sessile. 
Leaf blades pointed at the apex, obtuse to acute or apicu- 
late, oval to obovate, never obovate-oval or obovate- 
orbicular. 
Blades of the leaves 5 to 10.5 cm. long, 2 to 4 cm. wide, 
the lateral veins scarcely prominent beneath, 8 to 
12 on each side............2.22222.2222---222---- 
Blades of the leaves 8.5 to 17 cm. long, 4 to 9.5 cm. 
wide, the lateral veins prominent beneath, 7 to 9 
on each side...... wee cece eee eee eee eee eens 
Leaf blades broadly rounded at the apex, usually rounded- 
oval or obovate-orbicular. 
Blades of the leaves deeply emarginate at the base, the 
lateral veins prominent beneath.................. 
Blades of the leaves not at all emarginate at the base, 
the lateral veins not elevated.............-.-.-.-. 
Involucre symmetric, free from the receptacle or nearly so, 
the receptacle attached centrally to the peduncle or 
branch, its main axis thus forming an angle with that of 
the supporting branch. 
Receptacles sessile or, in one species, some sessile and others 
pedunculate. 
Leaf blades very large, 20 to 36 cm. long, pubescent 
beneath........-...2222--222-2 22222 e eee eee eee eee 
Leaf blades smaller, not over 16.5 cm. long and usually 
much smaller. 
Receptacles partly sessile and partly pedunculate on the 
same plant. Leaf blades nearly as broad as long, 
glabrous or nearly so........... ccc e eee eee eeeeee 
Receptacles all sessile. 
Leaf blades cuspidate at the apex, with a long acute 
acumen. Blades narrowly obovate-oblong, 9 to 
16.5 cm. long, glabrous. ...........-.----+----- 
Leaf blades not cuspidate at the apex, sometimes 
apiculate or abruptly acuminate, but the acumen 
obtuse. 
Receptacles 12 to 14 mm, in diameter or larger. 
Leaf blades oblong or elliptic-oblong, 10 to 14 
em. long....-.--------- 2-20 eee eee ee eee eee 
Receptacles 5 to 12 mm. in diameter. 
Leaf blades deeply cordate at the base, pubescent 
on both surfaces, broadly rounded at the 
2 0 . 
Leaf blades subcordate to rounded at the base, 
glabrous on the upper surface or nearly so. 
Receptacles 5 to 6.5 mm. in diameter; leaf 
blades abruptly acute or acuminate at the 
apex, with only 2 to 4 lateral veins on each 
10. F. eugeniaefolia. 
ll. F. tuerckheimii. 
12. F. tsophlebia. 
13. F. jimenezit. 
14. F. intramarginalis. 
. F. cookti. 
. F. panamensis. 
. F. williamsi. 
. F. inamoena. 
. F. colubrinae. 
