VASCU1 I R PLANTS. 27 



19. Filago, L. 



Superfhia. Head oo-flowered ; £> flowers tu- 

 bular, 4-dentate : ? flowers oo seriate, iiliforin ; 

 external rows hidden between the scales of the 

 involucre and the pale*. Scales of the involu- 

 cre imbricate, similar to the palere. Recepta- 

 cle elongate (like the axis of a spike). Pappus 

 of oo, capillary bristles, depauperated towards 

 the periphery. External row, ? flowers ; pap- 

 pus 0. 



0. flowers inconspicuous. 



•20. Anaphalis, DC. 



Necessaria. Superflua. Head oc-flowered; 

 S tubular, 5-dentate ; style undivided, blunt: 

 ? flowers oo-seriate filiform. Scales of the in- 

 volucre imbricate, oo-seriate, radiating ; exter- 

 nal rows ovate ; internal longer and narrower; 

 receptacle flat, naked ; pappus of 1-seriate, 

 distinct, scabrous bristles. %. 



21. Gnaphalium, L. 



Superflua. Head oo-flowered; ¥ flowers tu- 

 bular, 5-dentate ; style 2-cleft : 9 filiform, 

 oo -seriate ; involucre, ovate ; scales imbricate, 

 oo -seriate, sc;irious, as long as the head ; re- 

 ceptacle flat, naked ; pappus of 1-seriate, capil- 

 lary bristles. 



0. It- flowers pale. 



