434 COMPOSITE. 



flowers with either truncate or appendiculate tips. Pappus mostly pal- 

 eaceous or none. 



Hints of the Ciieiiera. 



* Bracts of the involucre in 2 or 3 series and somewhat imbricated. 



Receptacle globose or hemispherical; achenes with paleaceous pappus - - 72 



Receptacle flat; pappus 0; 



Large herb, with broad thin leaves -.----.-71 

 Low salt-marsh herb, with fleshy leaves ------ 85 



Receptacle flat; pappus present; achenes 2— 4-angled, villous - - - - 82 



* * Bracts of the involucre in 1 or 2 series and nearly equal. 



Receptacle flat, or nearly so; 



Rays present, narrow; 



Leaves divided; pappus 0, -------8(5 



" entire; pappus paleaceous; 



Achenes flat, villous-ciliate, ----- 76 



" terete, rugose, ----- 83 



Rays none, or not ligulate; pappus hyaline: 



Achenes slender, angled or striate; 



Outer flowers of the head larger, - - - - 80 



" " not enlarged, - - - -80,81 



Achenes compressed, villous on the margin - - - - 77 



Receptacle low-convex to conical or even subulate; 



Bracts of involucre joined feto a cup; 



Opposite-leaved glabrous herbs, - - - - 73 



Leaves opposite or alternate, floccose-tomentose 



at least beneath, - - - - - 75, 79 



Bracts of involucre not united; 



Plants white-woolly; achenes 4-angled, - 78, 79 



Plants hirsute or glabrous, not viscid, - - 74 



" glabrous, viscid, fragrant, - - - - 84 



71. VENEUASIA, De Candolle. Stout perennial, branching and 

 leafy, with scattered large heads of yellow flowers. Involucre hemis- 

 pherical, broad, the round-ovate bracts imbricated in several series, the 

 outer somewhat foliaceous, the innermost narrow and scarious. Recep- 

 tacle flat, naked. Rays many, long and narrow. Disk corollas cylin- 

 drical. Style-tips of the disk-flowers very obtuse. Achenes oblong- 

 linear, 5-angled, many-nerved, destitute of pappus. 



1. V. carpesioitles, DC. Prodr. vi. 43 (1837). Tall, widely branch- 



